Section 155 (Engine Cooling System)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Engine Cooling
- Diagnostic System Check - Engine Cooling
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC P0480: Cooling Fan Relay Control Circuit
- DTC P0483 or P0493: Cooling Fan System
- DTC P0495: Cooling Fan Speed High
- DTC P0526: Cooling Fan Speed Sensor Circuit
- DTC P1258: Engine Coolant Overtemperature - Protection Mode Active
- DTC P1481: Cooling Fan Speed Sensor Circuit
- DTC P1482: Cooling Fan Speed Output Circuit
- DTC P1484: Cooling Fan System Performance
- Symptoms - Engine Cooling
- Engine Coolant Temperature Indicator Always On
- Engine Overheating
- Loss of Coolant
- Thermostat Diagnosis
- Coolant Heater Inoperative
- Engine Fails To Reach Normal Operating Temperature
- Pressure Cap Testing
- Coolant Leak Testing
- Excessive Fan Noise
- Fan Clutch Diagnosis
- Repair Instructions
- Draining and Filling Cooling System (LL8)
- Draining and Filling Cooling System (LM4)
- Flushing
- Radiator Cleaning
- Coolant Recovery Reservoir Replacement
- Radiator Hose Replacement - Inlet (LM4)
- Radiator Hose Replacement - Inlet (LL8)
- Radiator Hose Replacement - Outlet (LM4)
- Radiator Hose Replacement - Outlet (LL8)
- Radiator Vent Inlet Hose Replacement
- Fan Clutch Replacement
- Cooling Fan and Shroud Replacement
- Cooling Fan Relay Replacement
- Thermostat Replacement (4.2L Engine)
- Thermostat Replacement (5.3L Engine)
- Coolant Air Bleed Pipe Assembly Replacement (5.3L Engine)
- Coolant Air Bleed Hose Replacement (5.3L Engine)
- Water Outlet Housing Replacement
- Water Pump Replacement (LL8)
- Water Pump Replacement (LM4)
- Radiator Replacement (LL8)
- Radiator Replacement (LM4)
- Coolant Heater Replacement (LL8)
- Coolant Heater Replacement (LM4)
- Coolant Heater Cord Replacement
- Description and Operation
- Special Tools and Equipment