Repair and Diagnosis (Single Page)
You are viewing the full "tree" of links on one page. This can load slowly, but is easier to search. The same page can appear multiple times under a different folder, that is why the page is so large.View "split tree" where inner folders are split out. where inner links are on separate pages.
Quick Lookups
Common Specs & Procedures
DTC Index
Electrical Component Locations- Diagnostic Connector (DLC) Locations
- ELECTRICAL COMPONENT LOCATOR - 4.3L VIN [Z] P Series
- ELECTRICAL COMPONENT LOCATOR - 5.7L VIN [K] P Series
- ELECTRICAL COMPONENT LOCATOR - 6.5L VIN [F] P Series
- ELECTRICAL COMPONENT LOCATOR - 7.4L VIN [N] P Series
Technical Bulletins
Wiring Diagrams- System Wiring Diagrams - P35
- Using lemon2025'S System Wiring Diagrams
- Wiring Diagrams - P Series Van
- Accessories & Equipment
- Cruise Control Systems
- Gauges & Instrument Panels
- Instrument Panel.
- Description & Operation
- Notes
- Instrument Panels
- Brake Warning Light System
- Charging System Warning Light
- Coolant Temperature Gauge
- Fuel Gauge
- Glow Plugs Light
- Low Coolant Indicator
- Oil Pressure Gauge
- Parking Brake Warning Light
- Service Engine Soon Light
- Service Fuel Filter Or Water In Fuel Warning Light
- Service Throttle Soon Warning Light
- Speedometer/Odometer
- Vehicle Speed Sensor
- Voltmeter
- Testing
- Removal & Installation
- Wiring Diagrams
- Description & Operation
- Instrument Panel.
- Steering Column Switches.
- Wiper/Washer Systems
- Brakes
- Mechanical - Hydraulic
- Disc Brake System & Drum Brake System - P Series Van
- Model Identification
- Description & Operation
- Bleeding Brake System
- Adjustments
- Testing
- Removal & Installation
- Automatic Parking Brake (MOTORHOME)
- Front Brake Caliper
- Front Brake Rotor
- Rear Brake Caliper
- Rear Brake Rotor
- Rear Brake Drum
- Rear Brake Shoes
- Wheel Cylinder
- Master Cylinder
- Power Brake Booster
- Combination Valve
- Rear Axle Bearing & Oil Seal (Semi-Floating Axle)
- Rear Axle Hub Bearings & Oil Seal (Full-Floating Axle)
- Overhaul
- Torque Specifications
- Drum Brake Specifications
- Disc Brake Specifications
- Power Brake Booster.
- Disc Brake System & Drum Brake System - P Series Van
- Mechanical - Hydraulic
- Drivelines & Axles
- Differentials & Drive Axles
- Drive Axle - DANA 10.5" & 11" (Full-Floating).
- Drive Axle - EATON Locking Differential.
- Drive Axle Ratio Identification.
- Driveshaft & Universal Joints
- Differentials & Drive Axles
- Electrical
- Charging Systems
- Charging System - DELCO-REMY.
- Description (Charging System - DELCO-REMY)
- Operation (Charging System - DELCO-REMY)
- Adjustments (Charging System - DELCO-REMY)
- Trouble Shooting (Charging System - DELCO-REMY)
- On-Vehicle Testing (Charging System - DELCO-REMY)
- Bench Testing (Charging System - DELCO-REMY)
- Removal & Installation (Charging System - DELCO-REMY)
- Overhaul (Charging System - DELCO-REMY)
- Generator Specifications (Charging System - DELCO-REMY)
- Torque Specifications (Charging System - DELCO-REMY)
- Wiring Diagrams (Charging System - DELCO-REMY)
- Charging System - DELCO-REMY.
- Component Locations
- Diagnostic Connector (DLC) Locations
- ELECTRICAL COMPONENT LOCATOR - 4.3L VIN [Z] P Series
- ELECTRICAL COMPONENT LOCATOR - 5.7L VIN [K] P Series
- ELECTRICAL COMPONENT LOCATOR - 6.5L VIN [F] P Series
- ELECTRICAL COMPONENT LOCATOR - 7.4L VIN [N] P Series
- Gauges
- Instrument Panel.
- Description & Operation
- Notes
- Instrument Panels
- Brake Warning Light System
- Charging System Warning Light
- Coolant Temperature Gauge
- Fuel Gauge
- Glow Plugs Light
- Low Coolant Indicator
- Oil Pressure Gauge
- Parking Brake Warning Light
- Service Engine Soon Light
- Service Fuel Filter Or Water In Fuel Warning Light
- Service Throttle Soon Warning Light
- Speedometer/Odometer
- Vehicle Speed Sensor
- Voltmeter
- Testing
- Removal & Installation
- Wiring Diagrams
- Description & Operation
- Instrument Panel.
- Starter
- Wiring Diagrams
- System Wiring Diagrams - P35
- Using lemon2025'S System Wiring Diagrams
- Wiring Diagrams - P Series Van
- Charging Systems
- Engine Mechanical
- Accessory Drive Belts
- Drive Belt Routing
- Belt Adjustment
- Serpentine Belt Routing
- Notes
- Serpentine Belt Routing ("C" & "K" With 4.3L, 5.0L & 5.7L)
- Serpentine Belt Routing ("C" & "K" With 6.5L Diesel)
- Serpentine Belt Routing ("C" & "K" With 7.4L)
- Serpentine Belt Routing ("G" With 4.3L, 5.0L & 5.7L)
- Serpentine Belt Routing ("G" With 7.4L)
- Serpentine Belt Routing ("G" & "P" With 6.5L Diesel)
- Serpentine Belt Routing ("G" & "P" With 6.5L Turbo Diesel)
- Drive Belt Routing
- Auxiliary Emission Control Systems
- Engine Cooling Fan
- Cooling System (Mechanical)
- Cooling System Specifications
- Drive Belt Routing
- Belt Adjustment
- Serpentine Belt Routing
- Notes
- Serpentine Belt Routing ("C" & "K" With 4.3L, 5.0L & 5.7L)
- Serpentine Belt Routing ("C" & "K" With 6.5L Diesel)
- Serpentine Belt Routing ("C" & "K" With 7.4L)
- Serpentine Belt Routing ("G" With 4.3L, 5.0L & 5.7L)
- Serpentine Belt Routing ("G" With 7.4L)
- Serpentine Belt Routing ("G" & "P" With 6.5L Diesel)
- Serpentine Belt Routing ("G" & "P" With 6.5L Turbo Diesel)
- Mechanical
- Engine Mechanical 4.3L V6 - VIN [Z]
- Engine Identification
- Adjustments
- Removal & Installation
- Overhaul
- Lubrication
- Torque Specifications
- Engine Specifications
- Engine Mechanical 5.7L V8 - VIN [K]
- Engine Identification
- Adjustments
- Removal & Installation
- Overhaul
- Lubrication
- Torque Specifications
- Engine Specifications
- Engine Mechanical 6.5L Turbo Diesel - VIN [F]
- Engine Identification
- Adjustments
- Trouble Shooting
- Removal & Installation
- Overhaul
- Lubrication
- Torque Specifications
- Engine Specifications
- Engine Mechanical 6.5L V8 Diesel - VIN [P]
- Engine Identification
- Adjustments
- Trouble Shooting
- Removal & Installation
- Overhaul
- Lubrication
- Torque Specifications
- Engine Specifications
- Engine Mechanical 7.4L V8 - VIN [N]
- Engine Identification
- Adjustments
- Removal & Installation
- Overhaul
- Lubrication
- Torque Specifications
- Engine Specifications
- Engine Mechanical 4.3L V6 - VIN [Z]
- Starter
- Accessory Drive Belts
- Engine Performance
- Engine Controls - Adjustments - 4.3L.
- Application
- Emissions
- EGR Function Testing - General Motors Trucks
- Emission Applications - Diesel
- Emission Control Abbreviations
- State Emission Standards - Diesel
- State Emission Standards - Gas
- ALASKA
- ARIZONA
- CALIFORNIA
- Colorado
- CONNECTICUT
- DELAWARE
- District Of COLUMBIA
- GEORGIA
- IDAHO
- ILLINOIS
- INDIANA
- KENTUCKY
- MARYLAND
- MASSACHUSETTS
- MISSOURI
- NEVADA
- New Jersey
- New MEXICO
- New YORK
- North CAROLINA
- OHIO
- OREGON
- PENNSYLVANIA
- RHODE Island
- TENNESSEE
- TEXAS
- UTAH
- VIRGINIA
- WASHINGTON
- WISCONSIN
- U. S. EPA ASM2525 & ASM5015 Start-Up Emission Standards
- U. S. EPA Revised Final ASM Emission Standards (ASM5015 & ASM2525)
- U.S. EPA Im240 Emission Standards
- Pin Voltage Charts
- Engine Controls - Pin Voltage Charts - 4.3L.
- Introduction
- Pin Voltage Charts
- "C" & "K" Series With 4L60-E A/T & Pcm
- 4.3L "C" & "K" Series With 4L80-E A/T & Pcm
- 4.3L "C" & "K" Series With M/T & Pcm
- 4.3L "G" Series With 4L60-E A/T & Pcm
- 4.3L "G" Series With 4L80-E A/T & Pcm
- 4.3L "M" & "L" Series With Pcm
- 4.3L "G" & "P" Series With A/T & Pcm
- "P" Series 4.3L With M/T & Pcm
- 4.3L VIN W "S" & "T" Series Pickup & Utility With A/T & Pcm
- 4.3L VIN Z - "S" & "T" Series Pickup With A/T & Pcm
- 4.3L VIN Z - "S" & "T" Series With M/T & VCM
- 4.3L "S" & "T" Series With A/T Or M/T & VCM-A
- Engine Controls - Pin Voltage Charts - 5.7L.
- Engine Controls - Pin Voltage Charts - 6.5L Diesel
- Introduction
- Pin Voltage Charts
- 6.5L Diesel - "C" & "K" Series With A/T & M/T
- Notes
- PCM Pin Voltage Chart (6.5L Diesel - "C" & "K" Series With A/T & M/T)
- PCM Terminal A-B Connector ID (6.5L Diesel - "C" & "K" Series With A/T & M/T)
- PCM Terminal C-D Connector ID (6.5L Diesel - "C" & "K" Series With A/T & M/T)
- PCM Terminal E-F Connector (6.5L Diesel - "C" & "K" Series With A/T & M/T)
- 6.5L Diesel - "P" Series With 4L80-E A/T
- 6.5L Diesel - "C" & "K" Series With A/T & M/T
- Engine Controls - Pin Voltage Charts - 7.4L
- Engine Controls - Pin Voltage Charts - 4.3L.
- Remove, Overhaul & Install
- Engine Controls - Remove/Install/Overhaul - 4.3L
- Introduction
- On-Vehicle Adjustments
- Powertrain Control Module (Pcm)
- Fuel System
- Ignition System
- Throttle Position (TP) Sensor
- Oxygen Sensor
- Torque Specifications
- Engine Controls - Remove/Install/Overhaul - 5.7L.
- Introduction
- On-Vehicle Adjustments
- Powertrain Control Module (Pcm)
- Knock Sensor (KS) Module
- Fuel System
- Ignition System
- Throttle Position (TP) Sensor
- Oxygen Sensor
- Torque Specifications
- Engine Controls - Remove/Install/Overhaul - 6.5L Diesel.
- Engine Controls - Remove/Install/Overhaul - 7.4L
- Introduction
- On-Vehicle Adjustments
- Powertrain Control Module (Pcm)
- Fuel System
- Ignition System
- Throttle Position (TP) Sensor
- Oxygen Sensor
- Torque Specifications
- Engine Controls - Remove/Install/Overhaul - 4.3L
- Sensor Range Charts
- Specifications
- System
- Engine Controls - Basic Diagnostic Procedures - 4.3L
- Model Identification
- Introduction
- Preliminary Inspection & Adjustments
- A-3, No-Start Diagnosis
- A-4 Injector Circuit Diagnosis
- A-7, Basic Fuel System Checks
- A-8, Injector Coil Test
- C-4, Basic Ignition System Checks
- Idle Speed & Ignition Timing
- Diagnostic Circuit Check
- On-Board Diagnostic (OBD) System Check
- Diagnostic Circuit Check & Work Flow Chart
- Summary
- Wiring Diagrams
- Engine Controls - System/Component Tests - 4.3L.
- Model Identification
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Relays, Solenoids, Motors & Modules
- Fuel System
- Ignition System
- Emission Systems & Sub-Systems
- Miscellaneous ECM/Pcm/VCM Controls
- Diagnostic Charts
- Notes
- Chart C-10, A/C Compressor Clutch Circuit Diagnosis - 4.3L (VIN W & Z) S" & "T" Series A/T & 4.3L (VIN W) "T" Series M/T
- Chart C-10, A/C Compressor Clutch Circuit Diagnosis 4.3L (VIN Z) "S" & "T" Series M/T (1 Of 2)
- Chart C-10, A/C Compressor Clutch Circuit Diagnosis 4.3L (VIN Z) "S" & "T" Series M/T (2 Of 2)
- A/C Request Signal Circuit Diagnosis - 4.3L VIN W & Z ("C", "G", "K", "L", "M" & "P" Series)
- Auxiliary Cooling Fan Circuit Diagnosis
- Component Locations
- Wiring Diagrams
- Astro & Safari - VIN W
- "C" & "K" Series - With A/T
- "C" & "K" Series Pickup & Sierra - With M/T
- "P" Series - With M/T
- "P" Series - Commercial Van/MOTORHOME - With 4L80-E
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/VCM
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/VCM
- Van - With 4L60-E
- Van - With 4L80-E
- Engine Controls - System/Component Tests - 7.4L
- Model Identification
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Notes
- A/C On Switch/System Test
- Brake Switch
- Engine Coolant Temperature (ECT) Sensor
- Intake Air Temperature (IAT) Sensor
- Knock Sensor
- Manifold Absolute Pressure (Map) Sensor
- Oxygen Sensor (O2S)
- Oxygen Sensor Heating Element
- Throttle Position (TP) Sensor
- Transmission Range Switch
- Vehicle Speed Sensor (Pm Generator)
- Relays, Solenoids, Motors & Modules
- Fuel System
- Ignition System
- Emission Systems & Sub-Systems
- Miscellaneous ECM/Pcm/VCM Controls
- Diagnostic Charts
- Component Locations
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 4.3L
- Model Identification
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- Code 13, Open Oxygen Sensor Circuit - All Models
- Code 14, Coolant Sensor Signal Voltage Low - All Models
- Code 15, Coolant Sensor Signal Voltage High - All Models
- Code 16, VSS Buffer Fault - "S" & "T" Series, (VIN W) Utility A/T & (VIN Z) Pickup A/T
- Code 21, TPS Signal Voltage High - All Models
- Code 22, TPS Signal Voltage Low - All Models
- Code 23, Intake Air Temp. Low - "L", "M", "S" & "T" Series
- Code 24, VSS Transmission Output Signal - A/T - All Models
- Code 25, Intake Air Temperature High - "L", "M", "S" & "T" Series
- Code 28, Transmission Range Pressure Switch - All Models
- Code 32, EGR Circuit Error BACKPRESSURE EGR With Solenoid - "C", "K" & "P" Series
- Code 32, EGR Circuit Error With EVRV Solenoid - "C", "G", "K" & "P" Series
- Code 32, EGR Circuit Error - "L", "M", "S" & "T" Series W/ Linear EGR
- Code 32, EGR Circuit Error - "C", "G" & "K" Series W/ Linear EGR
- Code 33, Map Sensor Signal Voltage High - All Models
- Code 34, Map Sensor Signal Voltage Low - All Models
- Code 35, Idle Speed Error - All Models
- Code 36, Idle Speed Actuator Fault - "C", "G", "K" & "P" Series A/T
- Codes 37/38, TCC Brake Switch On/Off - All Models A/T
- Code 39, TCC Stuck Off - "C", "G", "K" & "P" Series With 4L80-E Transmission
- Code 42, Ignition Control - All Models
- Code 43, Knock Sensor W/O Spark Module (Dual Sensors)
- Code 43, Knock Sensor Without Spark Module (Single Sensor)
- Code 43, Knock Sensor With Spark Control Module "C", "K" & "P" Series
- Code 44, Lean Exhaust Indication - All Models
- Code 45, Rich Exhaust Indication - All Models
- Code 51, Prom Error (Faulty Or Incorrect Prom)
- Code 52, Faulty CALPAK
- Code 52/53, System Voltage High - All Models
- Code 54, Fuel Pump Circuit - All Models
- Code 55, ECM/Pcm Error
- Code 58, Transmission Fluid Temperature High - All Models
- Code 59, Transmission Fluid Temperature Low - All Models
- Code 66, 3-2 Control Solenoid CKT Fault 4L60-E Transmission
- Code 67, TCC Solenoid Circuit Check - 4L60-E Transmission
- Code 68, Overdrive Ratio Error - 4L80-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L60-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L80-E Transmission
- Code 72, VSS Circuit Loss Trans Output Signal - All Models
- Code 73, Pressure Control Solenoid (Current Error) - All Models
- Code 74, Transmission Input Speed Error 4L80-E Transmission
- Code 75, System Voltage Low - All Models
- Code 79, Transmission Fluid Temperature High - All Models
- Code 81, Transmission 2-3 Error - All Models
- Code 82, Transmission 1-2 Error - All Models
- Code 83, TCC Solenoid Circuit Fault - All Models
- Code 85, Undefined Gear Ratio - All Models
- Code 86, Low Gear Ratio Error - All Models
- Code 87, High Gear Ratio Error - All Models
- Code P0106, Map Sensor Range Problem - "S" & "T" Series 4.3L (VIN W)
- Code P0107, Map Sensor CKT - "S" & "T" Series 4.3L (VIN W)
- Code P0108, Map Sensor CKT - "S" & "T" Series 4.3L (VIN W)
- Code P0112, IAT Sensor Circuit Low Input - "S" & "T" Series 4.3L (VIN W)
- Code P0113, IAT Sensor Circuit High Input - "S" & "T" Series 4.3L (VIN W)
- Code P0117, Coolant Temperature Sensor Temperature Low "S" & "T" Series 4.3L (VIN W)
- Code P0118, Coolant Temperature Sensor Temperature High "S" & "T" Series 4.3L (VIN W)
- Code P0121, TP Sensor Range/Performance Problem "S" & "T" Series 4.3L (VIN W)
- Code P0122, Throttle Position Sensor Signal Low "S" & "T" Series 4.3L (VIN W)
- Code P0123, Throttle Position Sensor Signal High "S" & "T" Series 4.3L (VIN W)
- Code P0123, Throttle Position Sensor Signal High 4.3L "S" & "T" Series (VIN Z)
- Code P0125, Coolant Sensor Excessive Time To Closed Loop "S" & "T" Series 4.3L (VIN W)
- Code P0131, Heated Oxygen Sensor Low Signal Voltage (Lean) "S" & "T" Series 4.3L (VIN W)
- Code P0132, Heated O2 Sensor High Signal Voltage (Rich) "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0133, Heated Oxygen Sensor Slow Response
- Code P0134, Heated Oxygen Sensor Open Circuit - "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0135, Heated Oxygen Sensor Heater Circuit Malfunction "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0137, Heated Oxygen Sensor Low Signal Voltage (Lean) "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0138, Heated Oxygen Sensor High Signal Voltage (Rich) "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0139, Heated Oxygen Sensor Open Circuit "S" & "T" Series 4.3L (VIN Z) Bank 1, Sensor 2
- Code P0140, Heated Oxygen Sensor Open Circuit "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0141, Heated Oxygen Sensor Heater Circuit Malfunction "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0171, Fuel Trim Lean - "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0171, Lean Exhaust - "S" & "T" Series 4.3L (VIN Z)
- Code P0172, Fuel Trim Rich - "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0172, Rich Exhaust - "S" & "T" Series 4.3L (VIN Z)
- Code P0300, Random Misfire Detected - "S" & "T" Series 4.3L (VIN W)
- Code P0301-306, Cylinders 1-6 Misfiring - "S" & "T" Series 4.3L (VIN W)
- Code P0320, Ignition Control Error - "S" & "T" Series 4.3L (VIN Z)
- Code P0325/326, Knock Sensor Open Or Shorted "S" & "T" Series 4.3L (VIN W)
- Code P0327, Knock Sensor Grounded - "S" & "T" Series 4.3L (VIN Z)
- Code P0328, Knock Sensor Open - "S" & "T" Series 4.3L (VIN Z)
- Code P0337/338, Crank Sensor Input - "S" & "T" Series 4.3L (VIN W)
- Code P0340, Cam Sensor Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P0341, Cam Sensor Range - "S" & "T" Series 4.3L (VIN W)
- Code P0400, EGR Error - "S" & "T" Series 4.3L (VIN Z)
- Code P0401, EGR Flow Test Failure - "S" & "T" Series 4.3L (VIN W)
- Code P0420, Catalyst Efficiency Low (Bank 1)
- Code P0441, Incorrect EVAP Purge - "S" & "T" Series 4.3L (VIN W)
- Code P0500, VSS Circuit - "S" & "T" Series
- Codes P0502/P0503, VSS Circuit Low/High - "S" & "T" Series 4.3L (VIN W)
- Code, P0506/507 IAC Counts Low/High - "S" & "T" Series 4.3L (VIN W)
- Code 560, System Voltage Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P0703 - TCC Brake Input Circuit "S" & "T" Series 4.3L (VIN W)
- Code P0712, Transaxle Temperature Sensor Signal Voltage Low "S" & "T" Series 4.3L (VIN W)
- Code P0713, Transaxle Temperature Sensor Signal Voltage High "S" & "T" Series 4.3L (VIN W)
- Code P0742, TCC Stuck On - "S" & "T" Series 4.3L (VIN W)
- Code P0748, Pressure Control Solenoid - "S" & "T" Series 4.3L (VIN W)
- Code P0753, 1-2 Shift Solenoid - "S" & "T" Series 4.3L (VIN W)
- Code P0756, 2-3 Shift Solenoid Performance - "S" & "T" Series 4.3L (VIN W)
- Code P0758, 2-3 Shift Solenoid Electrical "S" & "T" Series 4.3L (VIN W)
- Code P1106, Map Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1107, Map Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1111, IAT Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1112, IAT Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1114, ECT Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1115, ECT Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1121, TP Sensor Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1122, TP Sensor Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1133, Oxygen Sensor Insufficient Activity "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P1221, Fuel Pump Secondary System Circuit Low "S" & "T" Series 4.3L (VIN W)
- Code P1222, Fuel Pump Voltage Low - "S" & "T" Series 4.3L (VIN Z)
- Code P1345, Crankshaft/Camshaft Sensor Correlation Error "S" & "T" Series 4.3L (VIN W)
- Code P1351, Est Output High - "S" & "T" Series 4.3L (VIN W)
- Code P1361, Est Not Toggling - "S" & "T" Series 4.3L (VIN W)
- Code P1406, EGR Valve Pintle Position - "S" & "T" Series 4.3L (VIN W) (1 Of 2)
- Code P1406, EGR Valve Pintle Position - "S" & "T" Series 4.3L (VIN W) (2 Of 2)
- Code P1441, Evaporative System Continuous Purge "S" & "T" Series 4.3L (VIN W)
- Code P1442, Evaporative System Vacuum Switch Static Test Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P1508/1509, Idle Speed Low/High - "S" & "T" Series 4.3L (VIN W)
- Code P1632, System Voltage High - "S" & "T" Series 4.3L (VIN Z)
- Code P1810, Transmission Range Switch Assembly Circuit "S" & "T" Series 4.3L (VIN W)
- Code P1812, Trans Fluid OVERTEMP - "S" & "T" Series 4.3L (VIN W)
- Code P1860, TCC PWM Solenoid Electrical Circuit "S" & "T" Series 4.3L (VIN W)
- Code P1864, TCC Solenoid Electrical Circuit "S" & "T" Series 4.3L (VIN W)
- Code P1870, Transmission Component Slipping "S" & "T" Series 4.3L (VIN W)
- Code P1886, 3-2 Solenoid Electrical Circuit "S" & "T" Series 4.3L (VIN W)
- Summary
- Wiring Diagrams
- Astro & Safari
- "C" & "K" Series With A/T
- "C" & "K" Series Pickup & Sierra - With M/T
- "P" Series - With M/T
- "P" Series - Commercial Van/MOTORHOME - With 4L80-E
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/VCM
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/VCM
- Van - With 4L60-E
- Van - With 4L80-E
- Engine Controls - Tests W/Codes - 5.7L
- Model Identification
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- DTC 13: Open Oxygen Sensor Circuit
- DTC 14: Coolant Sensor Signal Voltage Low
- DTC 15: Coolant Sensor Signal Voltage High
- DTC 16: VSS Buffer Fault
- DTC 21: TPS Signal Voltage High
- DTC 22: TPS Signal Voltage Low
- DTC 24: VSS - "C" & "K" Series Except 5.7L M/T
- DTC 24: VSS Transmission Output Signal - A/T
- DTC 24: VSS - M/T
- DTC 28: Transmission Range Pressure Switch
- DTC 31: Engine Speed Governor - "G" Series
- DTC 32: EGR Circuit Error BACKPRESSURE EGR With Solenoid
- DTC 32: EGR Circuit Error With EVRV Solenoid
- DTC 32: EGR CKT Error - "C", "G", "K" Series W/ Linear EGR
- DTC 33: Map Sensor Signal Voltage High
- DTC 34: Map Sensor Signal Voltage Low
- DTC 35: Idle Speed Error
- DTC 36: Idle Speed Actuator Fault - A/T
- DTC 37/38: TCC Brake Switch On/Off
- DTC 39: TCC Stuck Off - 4L80-E Transmission
- DTC 42: Ignition Control
- DTC 43: Knock Sensor Without Spark Module (Dual Sensors)
- DTC 43: Knock Sensor Without Spark Module (Single Sensor)
- DTC 43: Knock Sensor With Spark Control Module
- DTC 44: Lean Exhaust Indication
- DTC 45: Rich Exhaust Indication
- DTC 51: Prom Error (Faulty Or Incorrect Prom)
- DTC 52: Faulty CALPAK
- DTC 52/53: System Voltage High
- DTC 55: ECM/Pcm Error
- DTC 54: Fuel Pump Circuit
- DTC 58: Transmission Fluid Temperature High
- DTC 59: Transmission Fluid Temperature Low
- DTC 66: 3-2 Control Solenoid CKT Fault 4L60-E Transmission
- DTC 67: TCC Solenoid Circuit Check - 4L60-E Transmission
- DTC 68: Overdrive Ratio Error - 4L80-E Transmission
- DTC 69: Torque Converter Clutch Stuck On 4L60-E Transmission
- DTC 69: Torque Converter Clutch Stuck On 4L80-E Transmission
- DTC 72: VSS Circuit Loss Transmission Output Signal
- DTC 73: Pressure Control Solenoid (Current Error)
- DTC 74: Transmission Input Speed Error 4L80-E Transmission
- DTC 75: System Voltage Low
- DTC 79: Transmission Fluid Temperature High
- DTC 81: Transmission 2-3 Error
- DTC 82: Transmission 1-2 Error
- DTC 83: TCC Solenoid Circuit Fault
- DTC 85: Undefined Gear Ratio
- DTC 86: Low Gear Ratio Error
- DTC87: High Gear Ratio Error
- Summary
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 6.5L Diesel.
- Introduction
- Self-Diagnostic System
- Diagnostic Trouble Code Charts
- Notes
- On-Board Diagnostic (OBD) System Check (Models With Pcm)
- On-Board Diagnostic (OBD) System Check - (4L80-E With TCM)
- Chart A-1, No Mil (Service Engine Soon Light) (Models W/ Pcm)
- Chart A-1, No Mil (Service Engine Soon Light) 4L80-E W/ TCM
- Chart A-2, No Scan Data, Mil (Service Engine Soon) On At All Times Or Will Not Flash Mil (Models With Pcm)
- Chart A-2, No Data Link Connector (DLC) Data, Will Not Display DTC 12 Or Mil On Steady (4L80-E W/ TCM)
- Chart A-3, Engine Cranks But Will Not Run
- EGR Control Pressure/BARO Sensor Output Check
- DTC 13, Engine Shutoff Solenoid Circuit Fault
- DTC 14, ECT Sensor Circuit Low (High Temperature Indicated)
- DTC 15, ECT Sensor Circuit High (Low Temperature Indicated)
- DTC 16, Vehicle Speed Signal Buffer Fault
- DTC 17, High Resolution Circuit Fault
- DTC 18, Pump Cam Reference Pulse Error
- DTC 19, Crankshaft Position Reference Error
- DTC 21, App No. 1 Circuit High (Models With Pcm)
- DTCS 21/22, TP Sensor Circuit High/Low (4L80-E With TCM)
- DTC 22, App No. 1 Circuit Low (Models With Pcm)
- DTC 23, App No. 1 Circuit Range Fault
- DTC 24, VSS Circuit Low (Transmission Output Speed Signal)
- DTC 25, Accelerator Pedal Position (App) No. 2 Circuit High
- DTC 26, Accelerator Pedal Position (App) No. 2 Circuit Low
- DTC 27, App No. 2 Circuit Range Fault
- DTC 28, Transmission Range Pressure Switch Circuit Fault
- DTC 29, Glow Plug Relay Circuit Fault
- DTC 31, EGR Control Pressure/BARO Sensor CKT Low (High Vac)
- DTC 32, EGR Circuit Error - "G" Series
- DTC 33, EGR Control Pressure/BARO Sensor CKT High (Low Vac)
- DTC 34, Injection Timing Stepper (Its) Motor Circuit Fault
- DTC 35, Injection Pulse Width Error (Response Time Short)
- DTC 36, Injection Pulse Width Error (Response Time Long)
- DTCS 37/38, TCC Brake Switch Stuck On/Off
- DTC 39, TCC Stuck Off (4L80-E)
- DTC 41, Brake Switch Circuit Fault
- DTC 41, Brake Switch Circuit Fault - "P" Series
- DTC 42, Fuel Temp Circuit Low (High Temp Indicated)
- DTC 43, Fuel Temp Circuit High (Low Temp Indicated)
- DTC 44, EGR Pulse Width Error - "G" Series
- DTC 45, EGR Vent Error - "G" Series
- DTC 46, Malfunction Indicator Light (Mil) Circuit Fault
- DTC 47, IAT Sensor Circuit Low (High Temperature Indicated)
- DTC 48, IAT Sensor Circuit High (Low Temperature Indicated)
- DTC 49, Service Throttle Soon Light Circuit Fault
- DTC 51, Prom Problem (Faulty Or Incorrect Prom)
- DTCS 52/53, System Voltage High Long
- DTC 54, Pcm Fuel Circuit Error
- DTC 56, Injection Pump Calibration Resistor Error
- DTC 57, Pcm 5-Volt Shorted
- DTC 58, Transmission Fluid Temp Sensor Circuit Low (High Temp Indicated) 4L60-E & 4L80-E
- DTC 59, Transmission Fluid Temp Sensor Circuit High (Low Temp Indicated) 4L60-E & 4L80-E
- DTC 61, Turbo Boost Sensor Circuit High - "P" Series
- DTC 62, Turbo Boost Sensor Circuit Low - "P" Series
- DTC 63, Accelerator Pedal Position (App) No. 3 Circuit High (Models With Pcm)
- DTCS 63/64, BARO Sensor Circuit High/Low (4L80-E With TCM)
- DTC 64, App No. 3 Circuit Low (Models With Pcm)
- DTC 65, App No. 3 Circuit Range Fault
- DTC 66, 3-2 Control Solenoid CKT Fault - "G" Series 4L60-E
- DTC 67, TCC Solenoid Circuit Fault - "G" Series 4L60-E
- DTC 68, Transmission Component Slipping (4L80-E)
- DTC 69, TCC Stuck On - "G" Series 4L60-E
- DTC 69, TCC Stuck On (4L80-E)
- DTC 71, Set/Coast Switch Fault (Models With Pcm)
- DTC 71, Camshaft Position Sensor Circuit Low (4L80-E W/ TCM)
- DTC 72, Speed Sensor Circuit Loss (Trans Output Speed Signal)
- DTC 73, Pressure Control Solenoid Circuit (Current Error)
- DTC 74, Transmission Input Speed Sensor Circuit (4L80-E)
- DTC 75, System Voltage Low
- DTC 76, Resume/ACCEL Switch Fault
- DTC 78, WASTEGATE Solenoid Fault - "P" Series
- DTC 79, Transmission Fluid OVERTEMP - 4L60-E & 4L80-E
- DTC 81, 2-3 Shift Solenoid Circuit Fault
- DTC 82, 1-2 Shift Solenoid Circuit Fault
- DTC 83, TCC PWM Solenoid Circuit Fault
- DTC 84, Accelerator Pedal Position (App) Circuit Fault
- DTC 85, Undefined Ratio Error (4L80-E)
- DTC 86, Low Ratio Error (4L80-E)
- DTC 87, High Ratio Error (4L80-E)
- DTC 88, TDC Offset Error
- DTC'S 91-98, Cylinder Balance Fault
- DTC 99, App No. 2 (5-Volt Reference Fault)
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 7.4L
- Model Identification
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- Code 13, Open Oxygen Sensor Circuit
- Code 14, Coolant Sensor Signal Voltage Low
- Code 15, Coolant Sensor Signal Voltage High
- Code 16, VSS Buffer Fault
- Code 21, TPS Signal Voltage High
- Code 22, TPS Signal Voltage Low
- Code 24, Vehicle Speed Sensor - "C" & "K" Series
- Code 24, VSS Transmission Output Signal - A/T
- Code 28, Transmission Range Pressure Switch
- Code 32, EGR Circuit Error BACKPRESSURE EGR With Sol
- Code 32, EGR Circuit Error With EVRV Solenoid
- Code 32, EGR Circuit Error - "P" Series With Linear EGR
- Code 32, EGR Circuit Error - Series W/ Linear EGR
- Code 33, Map Sensor Signal Voltage High
- Code 34, Map Sensor Signal Voltage Low
- Code 35, Idle Speed Error
- Code 36, Idle Speed Actuator Fault - A/T
- Codes 37/38, TCC Brake Switch On/Off
- Code 39, TCC Stuck Off - 4L80-E Transmission
- Code 42, Ignition Control
- Code 43, Knock Sensor Without Spark Module (Dual Sensors)
- Code 43, Knock Sensor Without Spark Module (Single Sensor)
- Code 43, Knock Sensor With Spark Control Module
- Code 44, Lean Exhaust Indication
- Code 45, Rich Exhaust Indication
- Code 51, Prom Error (Faulty Or Incorrect Prom)
- Code 52, Faulty CALPAK
- Code 52/53, System Voltage High
- Code 55, ECM/Pcm Error
- Code 54, Fuel Pump Circuit
- Code 58, Transmission Fluid Temperature High
- Code 59, Transmission Fluid Temperature Low
- Code 66, 3-2 Control Solenoid CKT Fault 4L60-E Transmission
- Code 67, TCC Solenoid Circuit Check - 4L60-E Transmission
- Code 68, Overdrive Ratio Error - 4L80-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L60-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L80-E Transmission
- Code 72, VSS Circuit Loss Transmission Output Signal
- Code 73, Pressure Control Solenoid (Current Error)
- Code 74, Transmission Input Speed Error 4L80-E Transmission
- Code 75, System Voltage Low
- Code 79, Transmission Fluid Temperature High
- Code 81, Transmission 2-3 Error
- Code 82, Transmission 1-2 Error
- Code 83, TCC Solenoid Circuit Fault
- Code 85, Undefined Gear Ratio
- Code 86, Low Gear Ratio Error
- Code 87, High Gear Ratio Error
- Summary
- Wiring Diagrams
- Engine Controls - Tests W/O Codes - 6.5L Diesel
- Introduction
- Symptoms
- Turbocharger Trouble Shooting
- INTERMITTENTS
- Engine Controls - Tests W/O Codes - Gasoline
- Introduction
- Symptoms
- How To Use This Section
- Hard Start
- Stalls After Starting
- Hesitation, Sag Or Stumble
- Vehicle Surges
- Lack Of Power Or Sluggish
- Engine Backfires
- Cuts Out, Misses
- Rough, Unstable Or Incorrect Idle
- Engine Will Not Idle
- Poor Fuel Economy
- Engine Dieseling/Run-On
- Detonation/Spark Knock
- Excessive Exhaust Emission (Odors)
- Turbocharger Trouble Shooting
- INTERMITTENTS
- Engine Controls - Basic Diagnostic Procedures - 4.3L
- Testing & Diagnosis
- Engine Controls - Basic Diagnostic Procedures - 4.3L
- Model Identification
- Introduction
- Preliminary Inspection & Adjustments
- A-3, No-Start Diagnosis
- A-4 Injector Circuit Diagnosis
- A-7, Basic Fuel System Checks
- A-8, Injector Coil Test
- C-4, Basic Ignition System Checks
- Idle Speed & Ignition Timing
- Diagnostic Circuit Check
- On-Board Diagnostic (OBD) System Check
- Diagnostic Circuit Check & Work Flow Chart
- Summary
- Wiring Diagrams
- Engine Controls - System/Component Tests - 4.3L.
- Model Identification
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Relays, Solenoids, Motors & Modules
- Fuel System
- Ignition System
- Emission Systems & Sub-Systems
- Miscellaneous ECM/Pcm/VCM Controls
- Diagnostic Charts
- Notes
- Chart C-10, A/C Compressor Clutch Circuit Diagnosis - 4.3L (VIN W & Z) S" & "T" Series A/T & 4.3L (VIN W) "T" Series M/T
- Chart C-10, A/C Compressor Clutch Circuit Diagnosis 4.3L (VIN Z) "S" & "T" Series M/T (1 Of 2)
- Chart C-10, A/C Compressor Clutch Circuit Diagnosis 4.3L (VIN Z) "S" & "T" Series M/T (2 Of 2)
- A/C Request Signal Circuit Diagnosis - 4.3L VIN W & Z ("C", "G", "K", "L", "M" & "P" Series)
- Auxiliary Cooling Fan Circuit Diagnosis
- Component Locations
- Wiring Diagrams
- Astro & Safari - VIN W
- "C" & "K" Series - With A/T
- "C" & "K" Series Pickup & Sierra - With M/T
- "P" Series - With M/T
- "P" Series - Commercial Van/MOTORHOME - With 4L80-E
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/VCM
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/VCM
- Van - With 4L60-E
- Van - With 4L80-E
- Engine Controls - System/Component Tests - 7.4L
- Model Identification
- Introduction
- Computerized Engine Controls
- Engine Sensors & Switches
- Notes
- A/C On Switch/System Test
- Brake Switch
- Engine Coolant Temperature (ECT) Sensor
- Intake Air Temperature (IAT) Sensor
- Knock Sensor
- Manifold Absolute Pressure (Map) Sensor
- Oxygen Sensor (O2S)
- Oxygen Sensor Heating Element
- Throttle Position (TP) Sensor
- Transmission Range Switch
- Vehicle Speed Sensor (Pm Generator)
- Relays, Solenoids, Motors & Modules
- Fuel System
- Ignition System
- Emission Systems & Sub-Systems
- Miscellaneous ECM/Pcm/VCM Controls
- Diagnostic Charts
- Component Locations
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 4.3L
- Model Identification
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- Code 13, Open Oxygen Sensor Circuit - All Models
- Code 14, Coolant Sensor Signal Voltage Low - All Models
- Code 15, Coolant Sensor Signal Voltage High - All Models
- Code 16, VSS Buffer Fault - "S" & "T" Series, (VIN W) Utility A/T & (VIN Z) Pickup A/T
- Code 21, TPS Signal Voltage High - All Models
- Code 22, TPS Signal Voltage Low - All Models
- Code 23, Intake Air Temp. Low - "L", "M", "S" & "T" Series
- Code 24, VSS Transmission Output Signal - A/T - All Models
- Code 25, Intake Air Temperature High - "L", "M", "S" & "T" Series
- Code 28, Transmission Range Pressure Switch - All Models
- Code 32, EGR Circuit Error BACKPRESSURE EGR With Solenoid - "C", "K" & "P" Series
- Code 32, EGR Circuit Error With EVRV Solenoid - "C", "G", "K" & "P" Series
- Code 32, EGR Circuit Error - "L", "M", "S" & "T" Series W/ Linear EGR
- Code 32, EGR Circuit Error - "C", "G" & "K" Series W/ Linear EGR
- Code 33, Map Sensor Signal Voltage High - All Models
- Code 34, Map Sensor Signal Voltage Low - All Models
- Code 35, Idle Speed Error - All Models
- Code 36, Idle Speed Actuator Fault - "C", "G", "K" & "P" Series A/T
- Codes 37/38, TCC Brake Switch On/Off - All Models A/T
- Code 39, TCC Stuck Off - "C", "G", "K" & "P" Series With 4L80-E Transmission
- Code 42, Ignition Control - All Models
- Code 43, Knock Sensor W/O Spark Module (Dual Sensors)
- Code 43, Knock Sensor Without Spark Module (Single Sensor)
- Code 43, Knock Sensor With Spark Control Module "C", "K" & "P" Series
- Code 44, Lean Exhaust Indication - All Models
- Code 45, Rich Exhaust Indication - All Models
- Code 51, Prom Error (Faulty Or Incorrect Prom)
- Code 52, Faulty CALPAK
- Code 52/53, System Voltage High - All Models
- Code 54, Fuel Pump Circuit - All Models
- Code 55, ECM/Pcm Error
- Code 58, Transmission Fluid Temperature High - All Models
- Code 59, Transmission Fluid Temperature Low - All Models
- Code 66, 3-2 Control Solenoid CKT Fault 4L60-E Transmission
- Code 67, TCC Solenoid Circuit Check - 4L60-E Transmission
- Code 68, Overdrive Ratio Error - 4L80-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L60-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L80-E Transmission
- Code 72, VSS Circuit Loss Trans Output Signal - All Models
- Code 73, Pressure Control Solenoid (Current Error) - All Models
- Code 74, Transmission Input Speed Error 4L80-E Transmission
- Code 75, System Voltage Low - All Models
- Code 79, Transmission Fluid Temperature High - All Models
- Code 81, Transmission 2-3 Error - All Models
- Code 82, Transmission 1-2 Error - All Models
- Code 83, TCC Solenoid Circuit Fault - All Models
- Code 85, Undefined Gear Ratio - All Models
- Code 86, Low Gear Ratio Error - All Models
- Code 87, High Gear Ratio Error - All Models
- Code P0106, Map Sensor Range Problem - "S" & "T" Series 4.3L (VIN W)
- Code P0107, Map Sensor CKT - "S" & "T" Series 4.3L (VIN W)
- Code P0108, Map Sensor CKT - "S" & "T" Series 4.3L (VIN W)
- Code P0112, IAT Sensor Circuit Low Input - "S" & "T" Series 4.3L (VIN W)
- Code P0113, IAT Sensor Circuit High Input - "S" & "T" Series 4.3L (VIN W)
- Code P0117, Coolant Temperature Sensor Temperature Low "S" & "T" Series 4.3L (VIN W)
- Code P0118, Coolant Temperature Sensor Temperature High "S" & "T" Series 4.3L (VIN W)
- Code P0121, TP Sensor Range/Performance Problem "S" & "T" Series 4.3L (VIN W)
- Code P0122, Throttle Position Sensor Signal Low "S" & "T" Series 4.3L (VIN W)
- Code P0123, Throttle Position Sensor Signal High "S" & "T" Series 4.3L (VIN W)
- Code P0123, Throttle Position Sensor Signal High 4.3L "S" & "T" Series (VIN Z)
- Code P0125, Coolant Sensor Excessive Time To Closed Loop "S" & "T" Series 4.3L (VIN W)
- Code P0131, Heated Oxygen Sensor Low Signal Voltage (Lean) "S" & "T" Series 4.3L (VIN W)
- Code P0132, Heated O2 Sensor High Signal Voltage (Rich) "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0133, Heated Oxygen Sensor Slow Response
- Code P0134, Heated Oxygen Sensor Open Circuit - "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0135, Heated Oxygen Sensor Heater Circuit Malfunction "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0137, Heated Oxygen Sensor Low Signal Voltage (Lean) "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0138, Heated Oxygen Sensor High Signal Voltage (Rich) "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0139, Heated Oxygen Sensor Open Circuit "S" & "T" Series 4.3L (VIN Z) Bank 1, Sensor 2
- Code P0140, Heated Oxygen Sensor Open Circuit "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0141, Heated Oxygen Sensor Heater Circuit Malfunction "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 2
- Code P0171, Fuel Trim Lean - "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0171, Lean Exhaust - "S" & "T" Series 4.3L (VIN Z)
- Code P0172, Fuel Trim Rich - "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P0172, Rich Exhaust - "S" & "T" Series 4.3L (VIN Z)
- Code P0300, Random Misfire Detected - "S" & "T" Series 4.3L (VIN W)
- Code P0301-306, Cylinders 1-6 Misfiring - "S" & "T" Series 4.3L (VIN W)
- Code P0320, Ignition Control Error - "S" & "T" Series 4.3L (VIN Z)
- Code P0325/326, Knock Sensor Open Or Shorted "S" & "T" Series 4.3L (VIN W)
- Code P0327, Knock Sensor Grounded - "S" & "T" Series 4.3L (VIN Z)
- Code P0328, Knock Sensor Open - "S" & "T" Series 4.3L (VIN Z)
- Code P0337/338, Crank Sensor Input - "S" & "T" Series 4.3L (VIN W)
- Code P0340, Cam Sensor Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P0341, Cam Sensor Range - "S" & "T" Series 4.3L (VIN W)
- Code P0400, EGR Error - "S" & "T" Series 4.3L (VIN Z)
- Code P0401, EGR Flow Test Failure - "S" & "T" Series 4.3L (VIN W)
- Code P0420, Catalyst Efficiency Low (Bank 1)
- Code P0441, Incorrect EVAP Purge - "S" & "T" Series 4.3L (VIN W)
- Code P0500, VSS Circuit - "S" & "T" Series
- Codes P0502/P0503, VSS Circuit Low/High - "S" & "T" Series 4.3L (VIN W)
- Code, P0506/507 IAC Counts Low/High - "S" & "T" Series 4.3L (VIN W)
- Code 560, System Voltage Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P0703 - TCC Brake Input Circuit "S" & "T" Series 4.3L (VIN W)
- Code P0712, Transaxle Temperature Sensor Signal Voltage Low "S" & "T" Series 4.3L (VIN W)
- Code P0713, Transaxle Temperature Sensor Signal Voltage High "S" & "T" Series 4.3L (VIN W)
- Code P0742, TCC Stuck On - "S" & "T" Series 4.3L (VIN W)
- Code P0748, Pressure Control Solenoid - "S" & "T" Series 4.3L (VIN W)
- Code P0753, 1-2 Shift Solenoid - "S" & "T" Series 4.3L (VIN W)
- Code P0756, 2-3 Shift Solenoid Performance - "S" & "T" Series 4.3L (VIN W)
- Code P0758, 2-3 Shift Solenoid Electrical "S" & "T" Series 4.3L (VIN W)
- Code P1106, Map Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1107, Map Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1111, IAT Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1112, IAT Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1114, ECT Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1115, ECT Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1121, TP Sensor Intermittent High - "S" & "T" Series 4.3L (VIN W)
- Code P1122, TP Sensor Intermittent Low - "S" & "T" Series 4.3L (VIN W)
- Code P1133, Oxygen Sensor Insufficient Activity "S" & "T" Series 4.3L (VIN W) Bank 1, Sensor 1
- Code P1221, Fuel Pump Secondary System Circuit Low "S" & "T" Series 4.3L (VIN W)
- Code P1222, Fuel Pump Voltage Low - "S" & "T" Series 4.3L (VIN Z)
- Code P1345, Crankshaft/Camshaft Sensor Correlation Error "S" & "T" Series 4.3L (VIN W)
- Code P1351, Est Output High - "S" & "T" Series 4.3L (VIN W)
- Code P1361, Est Not Toggling - "S" & "T" Series 4.3L (VIN W)
- Code P1406, EGR Valve Pintle Position - "S" & "T" Series 4.3L (VIN W) (1 Of 2)
- Code P1406, EGR Valve Pintle Position - "S" & "T" Series 4.3L (VIN W) (2 Of 2)
- Code P1441, Evaporative System Continuous Purge "S" & "T" Series 4.3L (VIN W)
- Code P1442, Evaporative System Vacuum Switch Static Test Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P1508/1509, Idle Speed Low/High - "S" & "T" Series 4.3L (VIN W)
- Code P1632, System Voltage High - "S" & "T" Series 4.3L (VIN Z)
- Code P1810, Transmission Range Switch Assembly Circuit "S" & "T" Series 4.3L (VIN W)
- Code P1812, Trans Fluid OVERTEMP - "S" & "T" Series 4.3L (VIN W)
- Code P1860, TCC PWM Solenoid Electrical Circuit "S" & "T" Series 4.3L (VIN W)
- Code P1864, TCC Solenoid Electrical Circuit "S" & "T" Series 4.3L (VIN W)
- Code P1870, Transmission Component Slipping "S" & "T" Series 4.3L (VIN W)
- Code P1886, 3-2 Solenoid Electrical Circuit "S" & "T" Series 4.3L (VIN W)
- Summary
- Wiring Diagrams
- Astro & Safari
- "C" & "K" Series With A/T
- "C" & "K" Series Pickup & Sierra - With M/T
- "P" Series - With M/T
- "P" Series - Commercial Van/MOTORHOME - With 4L80-E
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/VCM
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/VCM
- Van - With 4L60-E
- Van - With 4L80-E
- Engine Controls - Tests W/Codes - 5.7L
- Model Identification
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- DTC 13: Open Oxygen Sensor Circuit
- DTC 14: Coolant Sensor Signal Voltage Low
- DTC 15: Coolant Sensor Signal Voltage High
- DTC 16: VSS Buffer Fault
- DTC 21: TPS Signal Voltage High
- DTC 22: TPS Signal Voltage Low
- DTC 24: VSS - "C" & "K" Series Except 5.7L M/T
- DTC 24: VSS Transmission Output Signal - A/T
- DTC 24: VSS - M/T
- DTC 28: Transmission Range Pressure Switch
- DTC 31: Engine Speed Governor - "G" Series
- DTC 32: EGR Circuit Error BACKPRESSURE EGR With Solenoid
- DTC 32: EGR Circuit Error With EVRV Solenoid
- DTC 32: EGR CKT Error - "C", "G", "K" Series W/ Linear EGR
- DTC 33: Map Sensor Signal Voltage High
- DTC 34: Map Sensor Signal Voltage Low
- DTC 35: Idle Speed Error
- DTC 36: Idle Speed Actuator Fault - A/T
- DTC 37/38: TCC Brake Switch On/Off
- DTC 39: TCC Stuck Off - 4L80-E Transmission
- DTC 42: Ignition Control
- DTC 43: Knock Sensor Without Spark Module (Dual Sensors)
- DTC 43: Knock Sensor Without Spark Module (Single Sensor)
- DTC 43: Knock Sensor With Spark Control Module
- DTC 44: Lean Exhaust Indication
- DTC 45: Rich Exhaust Indication
- DTC 51: Prom Error (Faulty Or Incorrect Prom)
- DTC 52: Faulty CALPAK
- DTC 52/53: System Voltage High
- DTC 55: ECM/Pcm Error
- DTC 54: Fuel Pump Circuit
- DTC 58: Transmission Fluid Temperature High
- DTC 59: Transmission Fluid Temperature Low
- DTC 66: 3-2 Control Solenoid CKT Fault 4L60-E Transmission
- DTC 67: TCC Solenoid Circuit Check - 4L60-E Transmission
- DTC 68: Overdrive Ratio Error - 4L80-E Transmission
- DTC 69: Torque Converter Clutch Stuck On 4L60-E Transmission
- DTC 69: Torque Converter Clutch Stuck On 4L80-E Transmission
- DTC 72: VSS Circuit Loss Transmission Output Signal
- DTC 73: Pressure Control Solenoid (Current Error)
- DTC 74: Transmission Input Speed Error 4L80-E Transmission
- DTC 75: System Voltage Low
- DTC 79: Transmission Fluid Temperature High
- DTC 81: Transmission 2-3 Error
- DTC 82: Transmission 1-2 Error
- DTC 83: TCC Solenoid Circuit Fault
- DTC 85: Undefined Gear Ratio
- DTC 86: Low Gear Ratio Error
- DTC87: High Gear Ratio Error
- Summary
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 6.5L Diesel.
- Introduction
- Self-Diagnostic System
- Diagnostic Trouble Code Charts
- Notes
- On-Board Diagnostic (OBD) System Check (Models With Pcm)
- On-Board Diagnostic (OBD) System Check - (4L80-E With TCM)
- Chart A-1, No Mil (Service Engine Soon Light) (Models W/ Pcm)
- Chart A-1, No Mil (Service Engine Soon Light) 4L80-E W/ TCM
- Chart A-2, No Scan Data, Mil (Service Engine Soon) On At All Times Or Will Not Flash Mil (Models With Pcm)
- Chart A-2, No Data Link Connector (DLC) Data, Will Not Display DTC 12 Or Mil On Steady (4L80-E W/ TCM)
- Chart A-3, Engine Cranks But Will Not Run
- EGR Control Pressure/BARO Sensor Output Check
- DTC 13, Engine Shutoff Solenoid Circuit Fault
- DTC 14, ECT Sensor Circuit Low (High Temperature Indicated)
- DTC 15, ECT Sensor Circuit High (Low Temperature Indicated)
- DTC 16, Vehicle Speed Signal Buffer Fault
- DTC 17, High Resolution Circuit Fault
- DTC 18, Pump Cam Reference Pulse Error
- DTC 19, Crankshaft Position Reference Error
- DTC 21, App No. 1 Circuit High (Models With Pcm)
- DTCS 21/22, TP Sensor Circuit High/Low (4L80-E With TCM)
- DTC 22, App No. 1 Circuit Low (Models With Pcm)
- DTC 23, App No. 1 Circuit Range Fault
- DTC 24, VSS Circuit Low (Transmission Output Speed Signal)
- DTC 25, Accelerator Pedal Position (App) No. 2 Circuit High
- DTC 26, Accelerator Pedal Position (App) No. 2 Circuit Low
- DTC 27, App No. 2 Circuit Range Fault
- DTC 28, Transmission Range Pressure Switch Circuit Fault
- DTC 29, Glow Plug Relay Circuit Fault
- DTC 31, EGR Control Pressure/BARO Sensor CKT Low (High Vac)
- DTC 32, EGR Circuit Error - "G" Series
- DTC 33, EGR Control Pressure/BARO Sensor CKT High (Low Vac)
- DTC 34, Injection Timing Stepper (Its) Motor Circuit Fault
- DTC 35, Injection Pulse Width Error (Response Time Short)
- DTC 36, Injection Pulse Width Error (Response Time Long)
- DTCS 37/38, TCC Brake Switch Stuck On/Off
- DTC 39, TCC Stuck Off (4L80-E)
- DTC 41, Brake Switch Circuit Fault
- DTC 41, Brake Switch Circuit Fault - "P" Series
- DTC 42, Fuel Temp Circuit Low (High Temp Indicated)
- DTC 43, Fuel Temp Circuit High (Low Temp Indicated)
- DTC 44, EGR Pulse Width Error - "G" Series
- DTC 45, EGR Vent Error - "G" Series
- DTC 46, Malfunction Indicator Light (Mil) Circuit Fault
- DTC 47, IAT Sensor Circuit Low (High Temperature Indicated)
- DTC 48, IAT Sensor Circuit High (Low Temperature Indicated)
- DTC 49, Service Throttle Soon Light Circuit Fault
- DTC 51, Prom Problem (Faulty Or Incorrect Prom)
- DTCS 52/53, System Voltage High Long
- DTC 54, Pcm Fuel Circuit Error
- DTC 56, Injection Pump Calibration Resistor Error
- DTC 57, Pcm 5-Volt Shorted
- DTC 58, Transmission Fluid Temp Sensor Circuit Low (High Temp Indicated) 4L60-E & 4L80-E
- DTC 59, Transmission Fluid Temp Sensor Circuit High (Low Temp Indicated) 4L60-E & 4L80-E
- DTC 61, Turbo Boost Sensor Circuit High - "P" Series
- DTC 62, Turbo Boost Sensor Circuit Low - "P" Series
- DTC 63, Accelerator Pedal Position (App) No. 3 Circuit High (Models With Pcm)
- DTCS 63/64, BARO Sensor Circuit High/Low (4L80-E With TCM)
- DTC 64, App No. 3 Circuit Low (Models With Pcm)
- DTC 65, App No. 3 Circuit Range Fault
- DTC 66, 3-2 Control Solenoid CKT Fault - "G" Series 4L60-E
- DTC 67, TCC Solenoid Circuit Fault - "G" Series 4L60-E
- DTC 68, Transmission Component Slipping (4L80-E)
- DTC 69, TCC Stuck On - "G" Series 4L60-E
- DTC 69, TCC Stuck On (4L80-E)
- DTC 71, Set/Coast Switch Fault (Models With Pcm)
- DTC 71, Camshaft Position Sensor Circuit Low (4L80-E W/ TCM)
- DTC 72, Speed Sensor Circuit Loss (Trans Output Speed Signal)
- DTC 73, Pressure Control Solenoid Circuit (Current Error)
- DTC 74, Transmission Input Speed Sensor Circuit (4L80-E)
- DTC 75, System Voltage Low
- DTC 76, Resume/ACCEL Switch Fault
- DTC 78, WASTEGATE Solenoid Fault - "P" Series
- DTC 79, Transmission Fluid OVERTEMP - 4L60-E & 4L80-E
- DTC 81, 2-3 Shift Solenoid Circuit Fault
- DTC 82, 1-2 Shift Solenoid Circuit Fault
- DTC 83, TCC PWM Solenoid Circuit Fault
- DTC 84, Accelerator Pedal Position (App) Circuit Fault
- DTC 85, Undefined Ratio Error (4L80-E)
- DTC 86, Low Ratio Error (4L80-E)
- DTC 87, High Ratio Error (4L80-E)
- DTC 88, TDC Offset Error
- DTC'S 91-98, Cylinder Balance Fault
- DTC 99, App No. 2 (5-Volt Reference Fault)
- Wiring Diagrams
- Engine Controls - Tests W/Codes - 7.4L
- Model Identification
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- Code 13, Open Oxygen Sensor Circuit
- Code 14, Coolant Sensor Signal Voltage Low
- Code 15, Coolant Sensor Signal Voltage High
- Code 16, VSS Buffer Fault
- Code 21, TPS Signal Voltage High
- Code 22, TPS Signal Voltage Low
- Code 24, Vehicle Speed Sensor - "C" & "K" Series
- Code 24, VSS Transmission Output Signal - A/T
- Code 28, Transmission Range Pressure Switch
- Code 32, EGR Circuit Error BACKPRESSURE EGR With Sol
- Code 32, EGR Circuit Error With EVRV Solenoid
- Code 32, EGR Circuit Error - "P" Series With Linear EGR
- Code 32, EGR Circuit Error - Series W/ Linear EGR
- Code 33, Map Sensor Signal Voltage High
- Code 34, Map Sensor Signal Voltage Low
- Code 35, Idle Speed Error
- Code 36, Idle Speed Actuator Fault - A/T
- Codes 37/38, TCC Brake Switch On/Off
- Code 39, TCC Stuck Off - 4L80-E Transmission
- Code 42, Ignition Control
- Code 43, Knock Sensor Without Spark Module (Dual Sensors)
- Code 43, Knock Sensor Without Spark Module (Single Sensor)
- Code 43, Knock Sensor With Spark Control Module
- Code 44, Lean Exhaust Indication
- Code 45, Rich Exhaust Indication
- Code 51, Prom Error (Faulty Or Incorrect Prom)
- Code 52, Faulty CALPAK
- Code 52/53, System Voltage High
- Code 55, ECM/Pcm Error
- Code 54, Fuel Pump Circuit
- Code 58, Transmission Fluid Temperature High
- Code 59, Transmission Fluid Temperature Low
- Code 66, 3-2 Control Solenoid CKT Fault 4L60-E Transmission
- Code 67, TCC Solenoid Circuit Check - 4L60-E Transmission
- Code 68, Overdrive Ratio Error - 4L80-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L60-E Transmission
- Code 69, Torque Converter Clutch Stuck On 4L80-E Transmission
- Code 72, VSS Circuit Loss Transmission Output Signal
- Code 73, Pressure Control Solenoid (Current Error)
- Code 74, Transmission Input Speed Error 4L80-E Transmission
- Code 75, System Voltage Low
- Code 79, Transmission Fluid Temperature High
- Code 81, Transmission 2-3 Error
- Code 82, Transmission 1-2 Error
- Code 83, TCC Solenoid Circuit Fault
- Code 85, Undefined Gear Ratio
- Code 86, Low Gear Ratio Error
- Code 87, High Gear Ratio Error
- Summary
- Wiring Diagrams
- Engine Controls - Tests W/O Codes - 6.5L Diesel
- Introduction
- Symptoms
- Turbocharger Trouble Shooting
- INTERMITTENTS
- Engine Controls - Tests W/O Codes - Gasoline
- Introduction
- Symptoms
- How To Use This Section
- Hard Start
- Stalls After Starting
- Hesitation, Sag Or Stumble
- Vehicle Surges
- Lack Of Power Or Sluggish
- Engine Backfires
- Cuts Out, Misses
- Rough, Unstable Or Incorrect Idle
- Engine Will Not Idle
- Poor Fuel Economy
- Engine Dieseling/Run-On
- Detonation/Spark Knock
- Excessive Exhaust Emission (Odors)
- Turbocharger Trouble Shooting
- INTERMITTENTS
- Engine Controls - Basic Diagnostic Procedures - 4.3L
- Theory and Operation
- Engine Controls - Theory & Operation - 4.3L.
- Introduction
- Air Induction System
- Computerized Engine Controls
- Notes
- Powertrain Control Module
- Input Devices
- Notes
- A/C On (A/C Request) Signal
- Battery Voltage
- Brake Switch Feedback
- Coolant Temperature Sensor (CTS)
- Cranking Signal
- Digital Ratio Adapter Controller (DRAC)
- EGR Pintle Position
- Fuel Pump Feedback
- Gear Switches
- Knock Sensor (KS)
- Manifold Absolute Pressure (MAP) Sensor
- Intake Air Temperature (IAT) Sensor (Some Engines)
- Oxygen Sensor (O2S)
- Park/Neutral Position (PNP) Switch
- Pressure Switch Manifold (PSM) (4L60-E & 4L80-E Transmission)
- RPM Reference Signal
- Throttle Position (TP) Sensor
- Transmission Temperature Sensor (TTS) (4L60-E, 4L80-E
- Vehicle Speed Sensor (VSS)
- Output Signals
- Notes
- ABS Control Motors ("S" & "T" Series With VCM)
- A/C Clutch Relay
- Air Injection Control Solenoid
- Cruise Control Solenoids
- SERVICE ENGINE SOON Light
- EGR Control Solenoid Valve
- Electronic Ignition (EI)
- ESC Timing Retard
- EVRV Solenoid
- Fuel Injectors
- Fuel Module
- Fuel Pump & Fuel Pump Relay
- HEI-EST Ignition
- Idle Air Control (IAC) Valve
- Self-Diagnostics
- Serial Data
- Shift Solenoids (4L60-E, 4L80-E & 4T60-E Transmission)
- Torque Converter Clutch
- Transmission Shift Light (Manual Transmission)
- Fuel System
- Ignition System
- Ignition Timing Control Systems
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Pcm Controls
- Wiring Diagrams
- Astro & Safari
- "C" & "K" Series Pickup, Sierra - W/ A/T
- "C" & "K" Series Pickup, Sierra - W/ M/T
- "P" Series - W/ M/T
- "P" Series - W/ 4L80-E
- "S" & "T" Series - VIN W With Pcm
- "S" & "T" Series - VIN W With VCM
- "S" & "T" Series - VIN Z With Pcm
- "S" & "T" Series - VIN Z With VCM
- Van - With 4L60-E
- Van - With 4L80-E
- Engine Controls - Theory & Operation - 5.7L.
- Introduction
- Air Induction System
- Computerized Engine Controls
- Notes
- Powertrain Control Module
- Input Devices
- Notes
- A/C On (A/C Request) Signal
- Battery Voltage
- Brake Switch Feedback
- Coolant Temperature Sensor (CTS)
- Cranking Signal
- Digital Ratio Adapter Controller (DRAC)
- EGR Pintle Position
- Fuel Pump Feedback
- Gear Switches
- Knock Sensor (KS)
- Manifold Absolute Pressure (MAP) Sensor
- Intake Air Temperature (IAT) Sensor (Some Engines)
- Oxygen Sensor (O2S)
- Park/Neutral Position (PNP) Switch
- Pressure Switch Manifold (PSM) (4L60-E & 4L80-E Transmission)
- RPM Reference Signal
- Throttle Position (TP) Sensor
- Transmission Temperature Sensor (TTS) (4L60-E, 4L80-E
- Vehicle Speed Sensor (VSS)
- Output Signals
- Notes
- A/C Clutch Relay
- Air Injection Control Solenoid
- Cruise Control Solenoids
- SERVICE ENGINE SOON Light
- EGR Control Solenoid Valve
- Electronic Ignition (EI)
- ESC Timing Retard
- EVRV Solenoid
- Fuel Injectors
- Fuel Module
- Fuel Pump & Fuel Pump Relay
- HEI-EST Ignition
- Idle Air Control (IAC) Valve
- Self-Diagnostics
- Serial Data
- Shift Solenoids (4L60-E, 4L80-E & 4T60-E Transmission)
- Torque Converter Clutch
- Transmission Shift Light (Manual Transmission)
- Fuel System
- Ignition System
- Ignition Timing Control Systems
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Pcm Controls
- Wiring Diagrams
- Engine Controls - Theory & Operation - 6.5L Diesel
- Introduction
- Air Induction System
- Computerized Engine Controls
- Notes
- Powertrain Control Module (Pcm)
- Input Devices
- Notes
- Accelerator Pedal Position (APP) Sensor
- Barometric Absolute Pressure (BARO) Sensor
- Boost Sensor
- Coolant Temperature Sensor (CTS)
- Crankshaft Position Sensor
- Fuel Temperature Sensor
- Intake Air Temperature (IAT) Sensor
- Manifold Absolute Pressure (MAP) Sensor
- Pump Cam Signal
- Transmission Fluid Temperature (TFT) Sensor
- Vehicle Speed Sensor (VSS)
- Output Signals
- Fuel System
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Pcm Controls
- Wiring Diagrams
- Engine Controls - Theory & Operation - 7.4L
- Introduction
- Air Induction System
- Computerized Engine Controls
- Notes
- Powertrain Control Module
- Input Devices
- Notes
- A/C On (A/C Request) Signal
- Battery Voltage
- Brake Switch Feedback
- Coolant Temperature Sensor (CTS)
- Cranking Signal
- Digital Ratio Adapter Controller (DRAC)
- EGR Pintle Position
- Fuel Pump Feedback
- Gear Switches
- Knock Sensor (KS)
- Manifold Absolute Pressure (MAP) Sensor
- Intake Air Temperature (IAT) Sensor (Some Engines)
- Oxygen Sensor (O2S)
- Park/Neutral Position (PNP) Switch
- Pressure Switch Manifold (PSM) (4L60-E & 4L80-E Transmission)
- RPM Reference Signal
- Throttle Position (TP) Sensor
- Transmission Temperature Sensor (TTS) (4L60-E, 4L80-E
- Vehicle Speed Sensor (VSS)
- Output Signals
- Notes
- A/C Clutch Relay
- Air Injection Control Solenoid
- Cruise Control Solenoids
- SERVICE ENGINE SOON Light
- EGR Control Solenoid Valve
- Electronic Ignition (EI)
- ESC Timing Retard
- EVRV Solenoid
- Fuel Injectors
- Fuel Module
- Fuel Pump & Fuel Pump Relay
- HEI-EST Ignition
- Idle Air Control (IAC) Valve
- Self-Diagnostics
- Serial Data
- Shift Solenoids (4L60-E, 4L80-E & 4T60-E Transmission)
- Torque Converter Clutch
- Transmission Shift Light (Manual Transmission)
- Fuel System
- Ignition System
- Ignition Timing Control Systems
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Pcm Controls
- Wiring Diagrams
- Engine Controls - Theory & Operation - 4.3L.
- Vacuum Diagrams
- Wiring Diagrams
- Engine Performance - Wiring Diagrams - 4.3L.
- Wiring Diagrams
- Astro & Safari - VIN W
- C/K Series Pickup, Sierra, Suburban, TAHOE & YUKON - With A/T
- "C" & "K" Series Pickup & Sierra - With M/T
- "P" Series - With M/T
- "P" Series - Commercial Van/MOTORHOME - With 4L80-E
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN W W/VCM
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/Pcm
- "S" & "T" Blazer, Jimmy, Pickup & SONOMA - VIN Z W/VCM
- Van - With 4L60-E
- Van - With 4L80-E
- Wiring Diagrams
- Engine Performance - Wiring Diagrams - 5.7L.
- Engine Performance - Wiring Diagrams - 6.5L (Diesel).
- Wiring Diagrams - 7.4L
- Engine Performance - Wiring Diagrams - 4.3L.
- General Information
- Abbreviations
- Basic Trouble Shooting
- Basic Trouble Shooting - General Information
- Commonly Used Abbreviations - General Information
- Emission Control Abbreviations
- Engine Performance - Trouble Shooting - General Information
- Brakes
- Anti-Lock Brake Safety Precautions - General Information
- Map - Brake Systems
- Brake Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Accelerometers
- Accumulators
- Anchor Pins
- Anti-Lock Brake Control Assembly(Module)
- Anti-Lock Brake Controller
- Anti-Lock Brake Systems
- Axle Seal
- Backing Plates
- Bleeder Screw
- Brake Abs Active Light (Blue)
- Brake Fluid
- Brake Friction Material
- Brake On - Off Switch
- Brake Pads
- Brake Pedals
- Brake Shoe Hardware
- Brake Shoes
- Brake Stoplight Switches
- Brake Warning Light (Amber)
- Brake Warning Light (Red)
- Bulb Sockets
- Bulbs And LEDS
- Caliper Hardware
- Caliper Mounting Pin
- Caliper Piston
- Caliper Shim
- Caliper Slider Pin (Bolt) Dust Boot
- Caliper Slider Pin (Bolt)
- Calipers
- Combination Valve
- Controllers
- Digital Ratio Axle Controllers And Buffers (Drab And Dram)
- Disable Switches
- Drums
- Electrical Brake Pumps
- Electrical Park Motor
- Electrical Pumps And Motors
- Electro-Magnetic Interference
- Electronic Brake Control Modulator
- Electronic Brake Distribution
- Electronic Brake Traction Control Module
- Electronic Controllers
- Electronic Traction Control
- External Brake Cable
- Flow Control Valve
- Fluid Level Sensor Switches
- Fluid
- Four Wheel Drive Switches
- Friction Material
- G Sensors
- Gaskets
- Gravitational Switches
- Grease Seal
- Height Sensing Proportioning Valve
- High Pressure Accumulator
- Hoses
- Hub
- Hydraulic Control Unit
- Hydraulic Modulators
- Hydro-Boosters
- Hydro-Electric Boosters (POWERMASTER)
- Ignition Disable Switches
- Lamp Driver Relay
- Lateral Acceleration Switches
- LEDS
- Lenses
- Low Pressure Accumulator
- Lug Nut
- Master Cylinder Cover Gasket
- Master Cylinders
- Modulators
- Motor Pack
- Motors
- Pads
- Parking Brake Cable
- Parking Brake Mechanism
- Parking Brake Shoes
- Parking Brake Switches
- Parking Brake Systems
- Pedal Travel Switches
- Pedals
- Power Distribution Center
- POWERMASTER
- Pressure Differential Switches
- Pressure Switches
- Pressure Transducers
- Proportioning Valve
- Pumps
- Relays
- RELUCTOR (Speed) Ring
- Rotors
- Self-Adjusting Systems
- Shoe Hardware
- Shoes
- Sockets
- Speed Sensor (RELUCTOR) Ring
- Speed Sensors (Electronic Wheel And Vehicle)
- Star Wheel
- Steel Brake Lines
- Stoplight Switches
- Stroke Sensor
- Switches
- Tires
- Tone Ring
- Toothed Rings (Tone Wheel)
- Traction Control System (TCS)
- Transfer Tubes
- Vacuum Boosters
- Vacuum Hoses
- Valves
- Wear Indicator
- Wheel Attachment Hardware
- Wheel Bearings, Races And Seals
- Wheel Cylinders
- Wiring Harnesses
- Yaw Rate Sensor
- Brake System CHECKSHEET
- Reason Code Explanation
- Automotive Terminology & Definitions
- Brake Systems
- Map - Routine Inspection Reference Guide
- Routine Inspection Reference Guide
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Maintenance Overview
- Antifreeze/Coolant
- Visual Inspection
- Radiator Cap Test
- Engine Fan
- Cooling System Power Flush And Refill
- Belts (Except Timing Belts)
- Belt TENSIONER
- Automatic Transmission Fluid
- Automatic Transmission Fluid Exchange & Filter Replacement
- Engine Oil
- Air Filters
- Cabin Air Filter
- Brake Fluid
- Battery
- Battery Cables
- Power Steering
- Power Steering Fluid
- Wiper Blades
- Routine Inspection CHECKSHEET
- Routine Inspection - UICS
- Brake Systems
- Drivetrain And Transmission
- Notes
- Automatic Transmission Fluid
- Clutch Master Cylinders
- Cooler Lines
- Coolers
- Differential Fluid
- Drain Plugs And Gaskets
- Filters And Screens
- Fluids And Lubricants
- Hoses, Lines, And Tubes
- Hydraulic Fluid
- Lubricants
- Manual Transmission Fluid
- Mounts (Engine, Transaxle And Transmission)
- Transfer Case Fluid
- Vacuum Hoses
- Electrical Systems
- Engine Performance And Maintenance
- Notes
- Accessory Belts
- Air Filter Elements
- Air Filter Gaskets
- Air Filter Housings And Gaskets
- Air Pump Belts
- Batteries
- Battery Connectors
- Belt Idler Assemblies (Accessory And Cam Belts)
- Belt TENSIONERS (Accessory And Cam Belt)
- Chemical Engine DECARBONIZATION
- Combustion Chamber Cleaning
- Coolant Recovery Tanks
- Coolant
- Distributor Caps
- Distributor Rotors
- Engine Cooling Systems
- Engine DECARBONIZATION
- Engine Oil Drain Plugs And Gaskets
- Engine Oil Filters And Canisters
- Engine Oil
- Fuel Filters
- Fuel Injector Cleaning
- Fuel Injectors
- Fuel System Cleaning Service
- Hose Clamps
- Hose Connectors
- Hose Couplers
- Hoses And Tubes (Fuel Lines, Radiator, Vacuum, By-Pass, Heater, Recovery Tank And Oil Coolers)
- Ignition Wires (Secondary)
- Intake Cleaning
- O2 Sensors
- PCV Breather Elements
- PCV Valves
- Radiator Caps And Pressurized Expansion Tank Caps
- Spark Plugs
- Thermostats And Housings
- Throttle Body Cleaning
- Timing Belts
- Vacuum Hoses, Tubes And Connections (Non-Metallic)
- Exhaust Systems
- Heating, Ventilation And Air Conditioning Systems
- Steering And Suspension, Wheel Alignment, Wheels And Tires
- Wheel & Tire Supplement
- Reason Code Explanation
- Automotive Terminology & Definitions
- Routine Inspection Reference Guide
- Check Lists
- Computer Relearn Procedures
- Driveline/Axles
- Drive Axle Noise Diagnosis - General Information
- Gear Tooth Contact Patterns - General Information
- Map - Drive Train & Transmission
- Drive Train & Transmission Systems
- Drivetrain And Transmission
- Notes
- Actuators (Electrical)
- Actuators (Vacuum)
- Automatic Transmission / Transaxle Assemblies/CVTS
- Automatic Transmission Fluid
- Axles
- Bearings And Races
- Bell Cranks
- Bell Housings
- Bushings (External)
- Cables (Speedometer)
- Cables (TV, Detent And Shift)
- Carrier Bearings
- Clutch Cables And Cable Housings
- Clutch Discs (Manual Transmissions)
- Clutch Forks
- Clutch Linkages (Mechanical)
- Clutch Master Cylinders
- Clutch Pedals
- Clutch Pivots
- Clutch Pressure Plates
- Clutch Release Bearings
- Clutch Slave Cylinders (Concentric)
- Clutch Slave Cylinders (Conventional Or External)
- Companion Flanges
- Connectors
- Cooler Bypass Valves
- Cooler Lines
- Coolers
- CV Joints
- Differential And Final Drive Assemblies
- Differential Fluid
- Dip Stick Tubes
- Dip Sticks (Fluid Level Indicators)
- Dowel Pins, Guides And Pilot Holes
- Drain Plugs And Gaskets
- Drive Shaft Flanges
- Drive Shafts And Half Shafts
- Dust Boots
- Engine Mounts
- Exciter Rings
- Filler Tubes
- Filters And Screens
- Flanges
- Flex Plates
- Fluid Level Indicators
- Fluids And Lubricants
- Flywheels
- Force Motors
- Gaskets
- Guides
- Half Shafts
- Hoses, Lines, And Tubes
- Housings (Bell, Case, Tail(Extension) And Auxiliary)
- Hydraulic Fluid
- Intermediate Shaft Support Bearings
- Key Interlock Systems
- Limited Slips
- Lines
- Linkages (External)
- Locking Hub Assemblies
- Locking Hub Control Knobs
- Lubricants
- Manual Transmission Fluid
- Manual Transmission/Transaxle Assemblies
- Metal Clad Seals
- METALASTIC Joints
- Modulator Pins
- Modulators
- Mounts (Engine, Transaxle And Transmission)
- Odometer Drives (Mechanical)
- Odometer Heads (Mechanical)
- Oil Pans
- Pans
- Pilot Holes
- Pressure Plates
- Pressure Switches
- Races
- Rubber Joints (METALASTIC)
- Screens
- Seals (Metal Clad)
- Seals
- Selector Interlock Systems
- Sensors
- Servos
- Shift Interlock Systems (Selector And Key Interlock Systems)
- Side Covers
- Slip Yokes
- Solenoids
- Speed Sensors (Electronic Wheel And Vehicle)
- Speedometer- Driven Gear Housing
- Speedometer/Odometer Drives (Mechanical)
- Speedometer/Odometer Heads (Mechanical)
- Speedometers/Odometers (Electronic)
- Switches
- Tone Wheels
- Toothed Rings (Tone Wheel)
- Torque Converters
- Transaxle Mounts
- Transducers (Transmission)
- Transfer Case Assemblies
- Transfer Case Fluid
- Transmission Coolers
- Transmission Mounts
- Transmission Pans
- Transmission Range Indicators (PRNDL)
- Tubes
- Universal Joints (CARDAN Or Cross Type)
- Vacuum Controls
- Vacuum Hoses
- Vacuum Motors
- Vacuum-Operated Switches
- Vehicle Speed Sensors
- Vents
- Vibration Dampers
- Wheel Attachment Hardware
- Wheel Speed Sensors
- Wiring Harnesses And Connectors
- Yokes And Slip Yokes
- Reason Code Explanation
- Automotive Terminology & Definitions
- Trouble Shooting - Clutches - General Information
- DTC Index
- Electrical
- Map - Electrical Systems
- Electrical Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Actuator Motors (Electric)
- Actuator Motors (Vacuum)
- Air Bags
- Alternators And Generators
- Amplifiers
- Antennas
- Batteries
- Battery Cables, Wires And Connectors
- Battery Cables
- Battery Trays And Hold Down Hardware
- Battery Wires
- Belts
- Bulb Sockets
- Bulbs, Sealed Beams And LEDS
- Cd Players
- Cigarette Lighter Assemblies
- Circuit Breakers
- Clutch Switches
- Connectors
- Control Modules
- Cruise Control Brake Switches
- Cruise Control Cables
- Cruise Control Clutch Switches
- Cruise Control Linkages And Cables
- Cruise Control Reservoirs
- Cruise Control Tubes
- Cruise Control Vacuum Dump Release Valves
- Cruise Control Vacuum Hoses, Tubes And
- Cruise Control Vehicle Speed Sensors
- Defoggers
- Defrosters
- Delays
- Dimmers
- Electric Heaters
- Equalizers
- Fuse Blocks
- Fuse Boxes And Blocks
- Fuses, Fusible Links And Circuit Breakers
- Fusible Links
- Gauges
- Generators
- Ground Cables And Straps
- Ground Straps
- Headlight Adjusters
- Heating Elements (Defrosters, Defoggers, Electric Heaters And Seats)
- Horns And Sirens
- Ignition Switches
- Indicator Lights
- Keyless Entry Keypads And Transmitters
- Keyless Entry Transmitters
- LEDS
- Lenses
- Microphones
- Mirrors (ELECTROCHROMATIC And Heated)
- Motors
- Neutral Safety Switches
- Odometers, Speedometers And Tachometers (Cable Driven)
- Odometers
- Power Distribution Center
- Pulleys
- Receivers, Amplifiers, Equalizers And Sub-Woofer Volume Controls
- Relay Boxes
- Relays
- Sealed Beams
- Seat Heaters
- Security Alarm Sensors
- Sirens
- Solenoids
- Speakers And Microphones
- Speedometer And Tachometer Linkages And Cables
- Speedometer Cables
- Speedometers
- Starters
- Sub-Woofer Volume Control
- Switches
- Tachometer Cables
- Tachometers
- Tape Players And Cd Players
- TENSIONERS
- Timers
- Transceivers
- Transducers
- Vacuum Accumulators (Reservoirs)
- Voltage Regulators
- Washer Fluid Level Senders
- Washer Pumps
- Wiper Arms And Blades
- Wiper Blades
- Wiper Hoses And Nozzles
- Wiper Linkages
- Wiper Nozzles
- Wiper Pump Reservoirs
- Wiring Harnesses And Connectors
- Battery, Starting & Charging System CHECKSHEET
- Reason Code Explanation
- Automotive Terminology & Definitions
- Electrical Systems
- Using lemon2025'S System Wiring Diagrams
- Map - Electrical Systems
- Engine
- Engine Overhaul Procedures - General Information
- * Please Read This First *
- Description
- Engine Identification
- Inspection Procedures
- Cleaning Procedures
- Component Cleaning
- Cylinder Head Replacement
- Cylinder Head Overhaul
- Pistons, Connecting Rods & Bearings
- Crankshaft & Main Bearings
- Camshaft
- Timing Chains & Belts
- Timing Gears
- Oil Pump
- Break-In Procedure
- General Cooling System Service - General Information
- Engine Overhaul Procedures - General Information
- Engine Performance
- Electrostatic Discharge Warning - General Information
- Engine Performance Diagnostic Routine Outline - General Information
- Engine Performance Safety Precautions
- Map - Engine Performance & Maintenance
- Engine Performance And Maintenance (Including Exhaust Systems)
- Engine Performance & Maintenance CHECKSHEET
- Engine Performance And Maintenance
- Notes
- Accelerator Pedal Position Sensor
- Accessory Belts
- Accessory Pulleys
- Air Conditioning Cycling Switches
- Air Conditioning Pressure Sensors
- Air Ducts And Tubes
- Air Filter Elements
- Air Filter Gaskets
- Air Filter Housings And Gaskets
- Air Fuel Ratio Sensors
- Air Injection Control Solenoids
- Air Plenums
- Air Pump Belts
- Air Pumps (Electric Driven)
- Air Tubes
- Aspirator, Check And DECEL Valves
- Baffles
- Ballast Primary Supply Resistor Wires
- Ballast Resistors And Primary Supply Resistors
- Barometric Pressure Sensors
- Batteries
- Battery Cables, Wires And Connectors
- Battery Connectors
- Battery Trays And Hold Down Hardware
- Battery Wires
- Belt Idler Assemblies (Accessory And Cam Belts)
- Belt TENSIONERS (Accessory And Cam Belt)
- Belt-Driven Air Pumps
- Boost Control Mechanism
- Camshaft Position Sensors
- Carburetors And Chokes
- Casting Core Plugs And Expansion Plugs
- Charge Air Coolers ""INTERCOOLERS"" (CAC)
- Check Valves
- Chemical Engine DECARBONIZATION
- Chokes
- Clutch Pedal Position Switches
- Cold Start Injectors
- Combustion Chamber Cleaning
- Connectors
- Coolant Recovery Tanks
- Coolant
- Cooling Fan Motor Modules
- Cooling Fan Motor Relays And Modules
- Cooling Fan Motor Resistors
- Cooling Fan Motor Sensors And Switches
- Cooling Fan Motor Switches
- Cooling Fan Motors
- Crankshaft Position Sensors
- Cylinder Deactivation Solenoid
- Cylinder Head Assemblies
- DECEL Valves
- Deflectors
- Dip Stick Tubes
- Dip Sticks And Tubes
- Distributor Advances And Retarders (Mechanical And Vacuum)
- Distributor Boots And Shields
- Distributor Caps
- Distributor Retarders (Mechanical And Vacuum)
- Distributor Rotors
- Distributor Shields
- Distributors
- Early Fuel Evaporation Valves (Heat Riser Assemblies)
- EGR Coolers
- EGR Exhaust Manifold Passages
- EGR Intake And Exhaust Manifold Passages
- EGR Plates And Coolers
- Electronic Spark Control Modules
- Electronic Transmission Control Devices
- Electronic Transmission Feedback Devices
- Engine Coolant Temperature Sensors
- Engine Cooling Systems
- Engine Covers (Oil Pan, Valve Cover, Timing Cover)
- Engine DECARBONIZATION
- Engine Oil Canisters
- Engine Oil Coolers (External)
- Engine Oil Drain Plugs And Gaskets
- Engine Oil Filters And Canisters
- Engine Oil Gaskets
- Engine Oil Pressure Gauges (Mechanical)
- Engine Oil
- Evaporative Emissions (EVAP) Canister Filters
- Evaporative Emissions (EVAP) Canister Purge Devices
- Evaporative Emissions (EVAP) Canisters
- Evaporative Emissions (EVAP) Feedback Devices
- Exhaust Gas RECIRCULATION Devices
- Exhaust Gas RECIRCULATION Feedback Devices
- Expansion Plugs
- Fan Control Sensor
- Fuel Accumulators And Dampers
- Fuel And Cold Start Injectors
- Fuel Caps
- Fuel Dampers
- Fuel Delivery Check Valves
- Fuel Distributors (BOSCH Cis)
- Fuel Filler Necks And RESTRICTORS
- Fuel Filters
- Fuel Injector Cleaning
- Fuel Injectors
- Fuel Level Senders
- Fuel Pressure Regulators
- Fuel Pumps (In-Tank, External, Electrical Or Mechanical)
- Fuel Rails
- Fuel RESTRICTORS
- Fuel System Cleaning Service
- Fuel Tanks
- Fuel
- Gaskets
- Grommets (Valve Cover)
- Harmonic Dampers
- Heater Control Valves
- Heater Cores
- Hose Clamps
- Hose Connectors
- Hose Couplers
- Hoses And Tube Couplers, Connectors And Clamps
- Hoses And Tubes (Fuel Lines, Radiator, Vacuum, By-Pass, Heater, Recovery Tank And Oil Coolers)
- Housings
- Idle Air Controls
- Idle Speed Control Actuators
- Ignition Boots
- Ignition Coil Towers
- Ignition Coils
- Ignition Control Modules (ICM)
- Ignition Switches
- Ignition Terminals
- Ignition Wires (Secondary)
- Inertia Fuel Shut-Off Switches
- Intake Air Temperature Sensors
- Intake Cleaning
- Intake Manifolds
- In-Tank Fuel Strainers
- INTERCOOLERS
- Knock Sensors
- Liquid Vapor Separators
- Long Block Assemblies
- Manifold Absolute Pressure (Map) Sensors
- Mass Air Flow (MAF) Sensors
- Metal Air Manifolds And Pipes
- Metal Air Pipes
- Mix Control Solenoids
- Motor Mounts
- O2 Sensors
- Oil Pans
- Oil Pressure Sending Units
- Oil Pump Pick-Up Screens
- Oil Pumps
- O-Rings, Gaskets, Seals And Spring Locks
- Park Neutral Position Switches
- PCV Breather Elements
- PCV Orifices
- PCV Valves
- Pick-Up Assemblies (Includes Magnetic, Hall Effect And Optical)
- Power Steering Pressure Sensors
- Powertrain Control Modules (Pcm) And Prom
- Powertrain Control Prom
- Pressurized Expansion Tank Caps
- Radiator / Cooling Fan Blades
- Radiator / Cooling Fan Clutches
- Radiator Caps And Pressurized Expansion Tank Caps
- Radiators
- Roll Over Valves
- Sealing Compounds
- Seals
- Secondary Air Injection System Management Devices
- Sensors
- Short Block Assemblies
- Shrouds, Baffles And Deflectors
- Spark Plugs
- Spring Locks
- Super Chargers
- Switches
- Thermal Vacuum Valves
- Thermostatic Air Door Assemblies
- Thermostats And Housings
- Throttle Bodies
- Throttle Body Cleaning
- Throttle Cables
- Throttle Linkages And Cables
- Throttle Position Sensors
- Throttle Position Switches
- Timing Belt Sprockets
- Timing Belts
- Timing Covers
- Torque Struts
- Transmission Range Switches
- Tube Clamps
- Tube Connectors
- Tube Couplers
- Tubes
- Turbo Chargers
- Vacuum Connections
- Vacuum Hoses, Tubes And Connections (Non-Metallic)
- Vacuum Regulator Solenoids
- Vacuum Tubes
- Valve Covers
- Vehicle Speed Senors
- Volume Air Flow Sensors
- Waste Gate And Boost Control Mechanisms
- Waste Gate Control Solenoids
- Water Pumps (Electric)
- Water Pumps (Non-Electric)
- Wiring Harnesses And Connectors
- Reason Code Explanation
- Automotive Terminology & Definitions
- Parasitic Load Explanation & Test Procedures - General Information
- State Emission Standards - Diesel
- State Emission Standards - Gas
- ALASKA
- ARIZONA
- CALIFORNIA
- Colorado
- CONNECTICUT
- DELAWARE
- District Of COLUMBIA
- GEORGIA
- IDAHO
- ILLINOIS
- INDIANA
- KENTUCKY
- MARYLAND
- MASSACHUSETTS
- MISSOURI
- NEVADA
- New Jersey
- New MEXICO
- New YORK
- North CAROLINA
- OHIO
- OREGON
- PENNSYLVANIA
- RHODE Island
- TENNESSEE
- TEXAS
- UTAH
- VIRGINIA
- WASHINGTON
- WISCONSIN
- U. S. EPA ASM2525 & ASM5015 Start-Up Emission Standards
- U. S. EPA Revised Final ASM Emission Standards (ASM5015 & ASM2525)
- U.S. EPA Im240 Emission Standards
- Waveforms - Injector Pattern Tutorial - General Information
- * Please Read This First *
- Purpose Of This Article
- Is A Lab Scope Necessary?
- The Two Types Of Injector Drivers
- The Two Ways Injector Circuits Are Wired
- Interpreting Injector Waveforms
- Current Waveform Samples
- Notes
- Example #1 - Voltage Controlled Driver
- Example #2 - Voltage Controlled Driver
- Example #3 - Voltage Controlled Driver
- Example #4 - Current Controlled Driver
- Example #5 - Current Controlled Driver
- Example #6 - Current Controlled Driver
- Example #7 - Current Controlled Driver
- Example #8 - Current Controlled Driver
- Voltage Waveform Samples
- Notes
- Example #1 - Voltage Controlled Driver
- Example #2 - Voltage Controlled Driver
- Example #3 - Voltage Controlled Driver
- Example #4 - Current Controlled Driver
- Example #5 - Current Controlled Driver
- Example #6 - Current Controlled Driver
- Example #7 - Current Controlled Driver
- Example #8 - Current Controlled Driver
- Map - Exhaust Systems
- Exhaust Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Catalytic Converters
- Exhaust And Tail Pipes
- Exhaust Connections
- Hangers
- Heat Risers (Mechanical EFE Devices)
- Heat Shields
- Manifolds (Cast And Tube Type)
- Mechanical EFE Devices
- Muffler Valve
- Mufflers And Resonators
- Reason Code Explanation
- Exhaust Systems
- Heating, Ventilation & A/C (HVAC)
- Map - Heating, Ventilation, & Air Conditioning
- Heating, Ventilation & Air Conditioning Systems
- Notes
- Map Standards Of Service
- The Map Process - Overview
- The Map Process - Overview Of Service Requirements And Suggestions
- Accumulators
- Actuators (Electrical)
- Actuators (Vacuum)
- Air Conditioning Fittings
- Air Conditioning Hoses
- Air Conditioning Metal Lines
- Air Control Doors
- Air Dams (External)
- Air Distribution System
- Belts
- Blend Doors
- Blower Fans (Blower Wheel Or Squirrel Cage)
- Blower Motors
- Blower Resistors
- Blower Switches
- Cabin Air Filters
- Circuit Breakers
- Compressor Clutch Assemblies
- Compressors
- Condenser Air Seals
- Condenser Fan Motors
- Condensers
- Connectors
- Control Cables
- Control Heads (Function Selectors)
- Control Linkages
- Control Modules
- Coolant
- Cooling Fan Blades
- Cooling Fan Clutches
- Cooling Fan Motors
- Evaporator Drain Tubes
- Evaporator Filters
- Evaporator Pressure Regulators (EPRS)
- Evaporators
- Expansion Valves
- Function Selectors
- Fuses, Fusible Links And Circuit Breakers
- Fusible Links
- Gaskets
- Heater Cases
- Heater Control Valves
- Heater Cores
- Heater Hoses
- High Pressure Relief Valves (HPRV)
- Idlers
- In-Line Filters
- Metal Fittings
- Metal Lines
- Mix And Air Control Doors (Blend Doors)
- ORIFACE Tubes
- O-Rings
- Pilot-Operated Absolutes (POAS)
- Plenums
- Pressure Control Valves
- Pressure Sensors
- Pulleys
- Radiators
- Receiver-DRIERS
- Refrigerant Oil
- Refrigerant
- Relays
- Seals
- Service Ports
- Spring Lock Couplings
- Suction Throttling Valves (STVS)
- Switches (Electrical)
- TENSIONERS
- Thermistors And Pressure Sensors
- Thermostats And Housings
- Vacuum Hoses And Tubes
- Vacuum Reservoirs
- Vacuum Tubes
- Valves In Receiver (VIRS)
- Water Pumps (Electric Auxiliary)
- Wiring Harnesses And Connectors
- Heating, Ventilation & Air Conditioning System CHECKSHEET
- Reason Code Explanation
- Automotive Terminology & Definitions
- Heating, Ventilation & Air Conditioning Systems
- Map - Heating, Ventilation, & Air Conditioning
- Hoist/Jack
- Identification
- Metric Conversions
- Maintenance Reminder Light (Reset Procedures)
- Engine Oil Replacement Reminder
- Notes
- Engine Oil Replacement Reminder Reset - Procedure 01
- Engine Oil Replacement Reminder Reset - Procedure 02
- Engine Oil Replacement Reminder Reset - Procedure 03
- Engine Oil Replacement Reminder Reset - Procedure 04
- Engine Oil Replacement Reminder Reset - Procedure 05
- Engine Oil Replacement Reminder Reset - Procedure 06
- Engine Oil Replacement Reminder Reset - Procedure 07
- Engine Oil Replacement Reminder Reset - Procedure 08
- Engine Oil Replacement Reminder Reset - Procedure 09
- Engine Oil Replacement Reminder Reset - Procedure 10
- Engine Oil Replacement Reminder Reset - Procedure 11
- Engine Oil Replacement Reminder Reset - Procedure 12
- Engine Oil Replacement Reminder Reset - Procedure 13
- Engine Oil Replacement Reminder Reset - Procedure 14
- Engine Oil Replacement Reminder Reset - Procedure 15
- Engine Oil Replacement Reminder Reset - Procedure 16
- Engine Oil Replacement Reminder Reset - Procedure 17
- Engine Oil Replacement Reminder Reset - Procedure 18
- Engine Oil Replacement Reminder Reset - Procedure 19
- Engine Oil Replacement Reminder Reset - Procedure 20
- Engine Oil Replacement Reminder Reset - Procedure 21
- Engine Oil Replacement Reminder Reset - Procedure 22
- Engine Oil Replacement Reminder Reset - Procedure 23
- Engine Oil Replacement Reminder Reset - Procedure 24
- Engine Oil Replacement Reminder Reset - Procedure 25
- Engine Oil Replacement Reminder Reset - Procedure 26
- Engine Oil Replacement Reminder Reset - Procedure 27
- Engine Oil Replacement Reminder Reset - Procedure 28
- Engine Oil Replacement Reminder Reset - Procedure 29
- Engine Oil Replacement Reminder Reset - Procedure 30
- Engine Oil Replacement Reminder Reset - Procedure 31
- Engine Oil Replacement Reminder Reset - Procedure 32
- Engine Oil Replacement Reminder Reset - Procedure 33
- Engine Oil Replacement Reminder Reset - Procedure 34
- Engine Oil Replacement Reminder Reset - Procedure 35
- Engine Oil Replacement Reminder Reset - Procedure 36
- Engine Oil Replacement Reminder Reset - Procedure 37
- Emissions Maintenance Reminder (Reminder Flag)
- Emissions Maintenance Reminder (Warning Light)
- Emissions Maintenance Reminder (Check Engine Light)
- Diesel Fuel Filter Replacement Reminder
- Maintenance Service Reminder
- Timing Belt Replacement Reminder
- Transmission Fluid Replacement Reminder
- Tire Pressure Monitor System Reminder
- Notes
- TPMS Reminder Reset - Procedure 01
- TPMS Reminder Reset - Procedure 02
- TPMS Reminder Reset - Procedure 03
- TPMS Reminder Reset - Procedure 04
- TPMS Reminder Reset - Procedure 05
- TPMS Reminder Reset - Procedure 06
- TPMS Reminder Reset - Procedure 07
- TPMS Reminder Reset - Procedure 08
- TPMS Reminder Reset - Procedure 09
- TPMS Reminder Reset - Procedure 10
- TPMS Reminder Reset - Procedure 11
- TPMS Reminder Reset - Procedure 12
- TPMS Reminder Reset - Procedure 13
- TPMS Reminder Reset - Procedure 14
- TPMS Reminder Reset - Procedure 15
- TPMS Reminder Reset - Procedure 16
- TPMS Reminder Reset - Procedure 17
- TPMS Reminder Reset - Procedure 18
- TPMS Reminder Reset - Procedure 19
- TPMS Reminder Reset - Procedure 20
- TPMS Reminder Reset - Procedure 21
- TPMS Reminder Reset - Procedure 22
- TPMS Reminder Reset - Procedure 23
- TPMS Reminder Reset - Procedure 24
- TPMS Reminder Reset - Procedure 25
- TPMS Reminder Reset - Procedure 26
- TPMS Reminder Reset - Procedure 27
- TPMS Reminder Reset - Procedure 28
- TPMS Reminder Reset - Procedure 29
- TPMS Reminder Reset - Procedure 30
- TPMS Reminder Reset - Procedure 31
- TPMS Reminder Reset - Procedure 32
- TPMS Reminder Reset - Procedure 33
- TPMS Reminder Reset - Procedure 34
- TPMS Reminder Reset - Procedure 35
- TPMS Reminder Reset - Procedure 36
- TPMS Reminder Reset - Procedure 37
- Engine Oil Replacement Reminder
- RPO Codes
- RPO Code Description (Codes 001-19F)
- RPO Code Description (Codes 19H-2EL)
- RPO Code Description (Codes 2F1-44I)
- RPO Code Description (Codes 44L-5J9)
- RPO Code Description (Codes 5K0-6FF)
- RPO Code Description (Codes 6FG-76A)
- RPO Code Description (Codes 76D-7XD)
- RPO Code Description (Codes 7XF-8M0)
- RPO Code Description (Codes 8M1-9C0)
- RPO Code Description (Codes 9C1-A0F)
- RPO Code Description (Codes A0G-Ar4)
- RPO Code Description (Codes Ar5-BCP)
- RPO Code Description (Codes BCQ-C12)
- RPO Code Description (Codes C13-Cur)
- RPO Code Description (Codes Cut-Dir)
- RPO Code Description (Codes Dr7-EHE)
- RPO Code Description (Codes EHF-F5P)
- RPO Code Description (Codes F5Q-G1V)
- RPO Code Description (Codes G1W-HFN)
- RPO Code Description (Codes HFO-JRG)
- RPO Code Description (Codes JRH-KLY)
- RPO Code Description (Codes KLZ-LQX)
- RPO Code Description (Codes LQY-MW9)
- RPO Code Description (Codes MWE-ODK)
- RPO Code Description (Codes ODL-Ora)
- RPO Code Description (Codes Orb-PDE)
- RPO Code Description (Codes PDF-QH6)
- RPO Code Description (Codes QH7-R8D)
- RPO Code Description (Codes R8E-T07)
- RPO Code Description (Codes T08-TJ0)
- RPO Code Description (Codes TJ1-U10)
- RPO Code Description (Codes USB-VG9)
- RPO Code Description (Codes VGA-W5Y)
- RPO Code Description (Codes W5Z-XE3)
- RPO Code Description (Codes XE4-Y9Z)
- RPO Code Description (Codes Ya2-ZD9)
- RPO Code Description (Codes ZDE-ZZZ)
- Specifications Index
- Steering
- Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
- Steering & Suspension Systems
- Wheel And Tire
- Steering & Suspension CHECKSHEET
- Wheels & Tires CHECKSHEET
- Steering And Suspension, Wheel Alignment, Wheels And Tires
- Notes
- Active Handling
- Active Suspension Control Modules
- Active Variable Ratio Steering
- Active Yaw Control
- Adaptive Cruise Control
- Advance TRAC
- Air Bags
- Air Ride Control Modules
- Air Ride Suspension Torsion Springs (Counter Balancing)
- Air Ride Suspension
- Air Ride Tubes
- Air Shocks And Air Struts
- Air Spring Valves
- Air Springs
- Air Suspension Control Valves
- Air Suspension DRIERS
- Axle Acceleration Sensor
- Ball Joints
- Body Acceleration Sensor
- Bushings
- Center Links
- Compressors
- Continuous Damping Control
- Control Arm Shafts
- Control Arms
- Control Modules
- Distance Regulation Control Module
- Distance Regulation Sensor
- Drag Links
- Dynamic Stability Control
- Dynamic Stability Traction Control
- Electronic Ride Control Shocks And Struts
- Electronic Stability Control
- Electronic Suspension System
- Flex Couplers
- Gaskets
- Height Sensors
- Hydraulic Hoses
- Hydraulic Power Steering Pumps
- Hydraulic Suspension Hoses
- Hydraulic Suspension Pumps
- Idler Arms
- Intermediate Shaft U-Joints
- King Pins
- Modules
- Pitman Arms
- Power Steering Belts
- Power Steering Coolers
- Power Steering Fluid
- Power Steering Hoses
- Power Steering Lines (Steel)
- Power Steering Pumps - Electric
- Power Steering Pumps
- Radar Sensor
- Radius Arms
- Relay Rods
- Relays
- Sensors
- Shock Absorbers, Strut Cartridges And Strut Assemblies
- Spindles
- Springs, Coil, Leaf And Torsion Bars
- STABILITRAC
- Stability Management System
- Steering Angle Sensor
- Steering Arms
- Steering Couplers
- Steering Dampers
- Steering Gears (Except Rack And Pinion)
- Steering Gears, Rack And Pinion
- Steering Knuckles
- Strike Out Bumpers
- Strut Bearing Plate Assemblies
- Strut Rods
- Suspension Pumps (Hydraulic)
- Sway Bar Links
- Sway Bar Mounting Bushings
- Sway Bars
- Switches
- Tie Rod Ends (Inner And Outer)
- Tire Pressure Monitoring System
- Tire Pressure Sensors
- Tires
- Torque Sensor
- Torsion Springs
- Track Bar Bushings
- Track Bars
- Trailing Arm Bushings
- Trailing Arms
- Valve Stems
- Vehicle Dynamics Control
- Vehicle Speed Sensor
- Vehicle Stability Assist
- Vehicle Stability/Skid Control
- Warning Lamps
- Wheel Alignment
- Wheel Attachment Hardware
- Wheel Bearings, Races And Seals
- Wheels (Rims)
- Wiring Harnesses And Connectors
- Reason Code Explanation
- Automotive Terminology & Definitions
- Wheel Alignment Theory & Operation - General Information
- Map - Steering, Suspension, Wheel Alignment, Wheels & Tires
- Traction Control Disable Procedures
- Trouble Shooting - Manual Transmission - General Information
- Heating, Ventilation & A/C (HVAC)
- A/C Compressor Clutch Controls
- General Servicing
- A/C Compressor Refrigerant Oil Checking
- A/C Compressor Servicing
- A/C System Specifications - P Series Van
- HVAC System General Servicing.
- HVAC Control Systems
- Steering
- Manual Steering
- Power Steering
- Steering Column - P Series Van
- Suspension
- Front Suspension
- Suspension - Front (Coil Spring)
- Description
- Adjustments
- Inspection
- Removal & Installation
- Torque Specifications
- Suspension - Front (Leaf Spring)
- Suspension - Front (Coil Spring)
- Rear Suspension
- Wheel Alignment
- Front Suspension
- Transmission
- Automatic Trans
- Automatic Transmission Diagnosis - 4L80-E
- Application
- Description
- Operation
- Trouble Shooting
- Electronic Self-Diagnostics
- Diagnostic Charts
- Diagnostic Charts - Gasoline
- DTC 14, Coolant Temperature Sensor Signal Voltage Low
- DTC 15, Coolant Temperature Sensor Signal Voltage High
- DTC 21, TPS Signal Voltage High
- DTC 22, TPS Signal Voltage Low
- DTC 24, Vehicle Speed Sensor Transmission Output Signal
- DTC 28, Trans. Range Pressure Switch
- DTCS 37/38, TCC Brake Switch On/Off
- DTC 39, TCC Stuck Off
- DTC 52/53, System Voltage High
- DTC 58, Trans. Fluid Temp. High
- DTC 59, Trans. Fluid Temp. Low
- DTC 68, Transmission Component Slipping
- DTC 69, Torque Converter Clutch Stuck On
- DTC 72, VSS Circuit Loss Transmission Output Signal
- DTC 74, Trans. Input Speed Error
- DTC 79, Trans. Fluid Temp. High
- DTC 85, Undefined Gear Ratio
- DTC 86, Low Gear Ratio Error
- DTC 87, High Gear Ratio Error
- Diagnostic Charts - Diesel
- On-Board Diagnostic (OBD) System Check - Models With Pcm
- On-Board Diagnostic (OBD) System Check - "G" & "P" Series With TCM
- Chart A-1, No Mil (Service Engine Soon Light) - Models W/Pcm
- Chart A-1, No Mil (Service Engine Soon Light) - "G" & "P" Series With TCM
- Chart A-2, No Scan Data, Mil (Service Engine Soon) On At All Times Or Will Not Flash Mil - Models With Pcm
- Chart A-2, No Data Link Connector (DLC) Data, Will Not Display DTC 12 Or Mil On Steady - "G" & "P" Series With TCM
- Chart A-3, Engine Cranks But Will Not Run
- DTC 14, Engine Coolant Temperature (ECT) Sensor Circuit Low (High Temperature Indicated)
- DTC 15, Engine Coolant Temperature (ECT) Sensor Circuit High (Low Temperature Indicated)
- DTC 24, Vehicle Speed Sensor Circuit Low (Trans Output Speed Signal)
- DTC 28, Trans. Range Pressure Switch Circuit Fault
- DTC 39, TCC Stuck Off
- DTC 58, Trans. Fluid Temp. Sensor Circuit Low (High Temperature Indicated)
- DTC 59, Trans. Fluid Temp. Sensor Circuit High (Low Temperature Indicated)
- DTC 68, Transmission Component Slipping
- DTC 69, Torque Converter Clutch Stuck On
- DTC 72, Vehicle Speed Sensor Circuit Loss (Transmission Output Signal)
- DTC 74, Trans. Input Speed Error
- DTC 79, Trans. Fluid Temp. High
- DTC 81, 2-3 Shift Solenoid Circuit Fault
- DTC 82, 1-2 Shift Solenoid Circuit Fault
- DTC 83, TCC PWM Solenoid Circuit Fault
- DTC 85, Undefined Gear Ratio
- DTC 86, Low Gear Ratio Error
- DTC 87, High Gear Ratio Error
- Component Tests
- Technical Service Bulletins (TSB)
- Wiring Diagrams
- Automatic Transmission Overhaul - 4L80-E
- Application
- Identification
- Description
- Lubrication
- On-Vehicle Service
- Adjustments
- Trouble Shooting
- Notes
- Quick Check
- Symptom Diagnosis
- Notes
- Fluid Flowing Out Of Vent Or Foaming
- Transmission Overheats
- Reduced Internal Lubrication
- High Or Low Line Pressure
- Inoperative In Drive
- Vehicle Moves Forward In "N"
- Engine Stall
- No Torque In Reverse & 3rd
- Locked In Park
- Vehicle Moves In Park
- Slips In Reverse
- No Reverse
- Slips In "D"
- No 1st Gear In "D4"
- No 1st Gear In "D2" Or "D3"
- No 1st Gear In "D1"
- No 1-2 Shift In "D4" (1st Gear Only)
- 1st & 2nd Gear Only
- 1st & 4th Gear Only (Manual 2nd & 3rd Only)
- Late 1-2 Shift
- No Engine Braking In "D1"
- No 2nd Gear
- 2nd Gear Only
- No Torque In 2nd
- Starts In 2nd Gear
- No 2nd Gear Braking In "D2"
- No Engine Braking In "D2"
- No Overrun Braking In "D2"
- No 1st Gear In "D3"
- No 2nd Gear In "D3"
- No 3rd Gear In "D3"
- Starts In 3rd Gear
- No Engine Braking In "D3"
- 2nd & 3rd Gear Only
- No 4th Gear
- Starts In 4th Gear
- Incorrect Shift Points
- Harsh Shifts
- Harsh Shifts ("D" To "R")
- Harsh Shifts (3-4 Shift)
- Harsh Shifts (4-3 Shift)
- Harsh Shifts ("D4" To "D3", "D2" Or "D1")
- Soft Shifts
- Soft Shift (Into "R")
- Soft Shift (R To "D")
- Soft Shift (2-1)
- Soft Shift (2-3)
- Soft Shift (3-2)
- Soft Shift ("D3" To "D2")
- No "D2" To "D1" Shift
- No "D3" To "D2" Shift
- No Converter Clutch Apply
- TCC Does Not Release
- TCC Apply Soft Or Slipping
- Incorrect TCC Apply Or Release
- Clutch & Band Application
- Electronic Self-Diagnostics & Electronic Testing
- Testing
- Removal & Installation
- Transmission Disassembly
- Component Disassembly & Reassembly
- Transmission Reassembly
- Transmission Specifications
- Torque Specifications
- Wiring Diagrams
- Automatic Transmission Overhaul & Testing - 4L60-E
- Application
- Identification
- Description
- Lubrication
- Adjustments
- On-Vehicle Service
- Trouble Shooting
- Notes
- Symptom Diagnosis
- 1st Gear Only, No Upshift
- 1st Gear Start In 2nd Gear Start Mode (Camaro/Firebird Only)
- Slips In 1st Gear
- Slipping Or Rough 1-2 Shift
- Slipping, Rough Or No 2-3 Shift
- 1st & 4th Or 2nd & 3rd Gear Only
- 3rd Gear Only
- 3-2 Flare Or Tie Up
- Slipping, Rough Or No 3-4 Shift
- No Reverse Or Slips In Reverse
- No Part-Throttle Or Delayed Downshifts
- Harsh Garage Shifts
- No Overrun Braking In Manual 3-2-1
- Drives (Creeps) In Neutral
- Starts In 2nd In "D"
- No Park
- Oil Pressure High Or Low
- High Or Low Shift Points
- No Converter Clutch Apply
- Converter Shudder
- No Converter Clutch Release
- Converter Clutch Applies When Cold
- Ratcheting Noise
- Oil Leaking Out Vent
- Vibration In Reverse & Whining Noise In Park
- Front Oil Leak
- Pump Bushing Spins Out, "Walks" Into Seal, Or Seizes To Converter Hub
- Falls Out Of 4th Gear During Coasting
- Binds Up On 3-4 Shift (Feels Like Brake Drag)
- No Forward Or Reverse Gears (Line Pressure Reading Okay)
- Binds Up In Reverse
- No Reverse
- No Drive In "D" Range
- No Drive In "OD" Range
- Clutch & Band Application
- Torque Converter
- Electronic Self-Diagnostics
- Testing
- Removal & Installation
- Transmission Disassembly
- Cleaning & Inspection
- Component Disassembly & Reassembly
- Transmission Reassembly
- Torque Specifications
- Automatic Transmission Removal & Installation
- Servicing - A/T.
- Automatic Transmission Diagnosis - 4L80-E
- Clutches
- Automatic Transmission Hydraulic Diagrams - 4L80-E.
- Manual Trans
- Manual Transmission Overhaul - New Venture 4500 5-Speed
- Removal & Installation - M/T
- Servicing - M/T
- Automatic Trans
- External Pages