Powertrain Control Module Fails Key Provisioning/Serial Data Authentication Configuration And Sets DTC U1962 (PIT6169C)

Publication date: 2024-07-30
Reference number: PIT6169C
Supersedes refnos: 24-NA-128, PIT6169, PIT6169A, PIT6169B

POWERTRAIN CONTROL MODULE FAILS KEY PROVISIONING/SERIAL DATA AUTHENTICATION CONFIGURATION AND SETS DTC U1962

TECHNICAL SERVICE BULLETIN

Reference Number(s): 24-NA-128, Date of Issue: Jul 30, 2024

Supercedes:

This Service Bulletin replaces PIT6169B. Please discard PIT6169B.

SERVICE INFORMATION

Brand:	Model:	Model Year:		Build Date:		Engine:	Transmission:
Brand:	Model:	from	to	from	to	Engine:	Transmission:
Chevrolet	Traverse	2024	2024	SOP	June 12, 2024	LK0
GMC	Acadia	2024	2024	SOP	June 12, 2024

Involved Region or Country	North America
Additional Options (RPOs)
Condition	Some technicians may comment that during any module programming event that is followed by SDAC (Serial Data Authentication Configuration), the K45 PCM (Powertrain Control Module) has the potential to fail SDAC and DTC U1962 will set.
Cause	The cause of the condition may be a software bug in the K45 PCM.
Correction	IMPORTANT: Before programming any modules on the vehicle, ensure the K45 PCM software is up to date. The only way to prevent this condition on vehicles built from SOP to June 12, 2024 is to ensure the K45 PCM software is up to date prior to ANY other programming. Follow the service procedure in this bulletin for updating the K45 PCM software. It is possible when bringing the K45 PCM up to date on the software level that it may experience the condition. If it does, K45 PCM replacement will be required. IMPORTANT: Ensure you save the SPS Log from the failed K45 PCM programming event for the part restriction. Locate your sps2.log: C:/ > Users > (User ID) > sps > spsDebug > spslog.txt Courtesy of GENERAL MOTORS COMPANY

SERVICE PROCEDURE

IMPORTANT:

Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must follow those applicable laws.

CAUTION:

Before downloading the update files, be sure the computer is connected to the internet through a network cable (hardwired). DO NOT DOWNLOAD or install the files wirelessly. If there is an interruption during programming, programming failure or control module damage may occur.

Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur.
Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage. Refer to www.gmdesolutions.com for further information. If not available, connect a fully charged 12?V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
Follow the on-screen prompts regarding ignition power mode, but ensure that anything that drains excessive power (exterior lights, HVAC blower motor, etc) is off.
Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.

IMPORTANT:

The service technician always needs to verify that the VIN displayed in the TLC left side drop down menu and the top center window match the VIN plate of the vehicle to be programmed prior to using Service Programming System 2 (SPS2) for programming or reprogramming a module.

For the TLC application, service technicians need to always ensure that the power mode (ignition) is "ON" before reading the VIN from the vehicle's VIN master module and that they do not select a VIN that is already in the TLC application memory from a previous vehicle.
If the VIN that shows up in the TLC top center window after correctly reading the VIN from the vehicle does not match the VIN plate of the vehicle, manually type in the VIN characters from the vehicle VIN plate into the TLC top center window and use these for programming or reprogramming the subject module with the correct vehicle VIN and software and/or calibrations.

CAUTION:

Be sure the VIN selected in the drop down menu (1) is the same as the vehicle connected (2) before beginning programming.

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IMPORTANT:

If the vehicle VIN DOES NOT match, the message below will be shown

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IMPORTANT:

Techline Connect screens shown above.

IMPORTANT:

If the same calibration/software warning is noted on the TLC Summary screen, select OK and follow screen instructions. After a successful programming event, the WCC is located in the Service Programming System dialogue box of the SPS Summary screen. No further action is required. Refer to the Warranty section of the bulletin.

Reprogram the Powertrain Control module. Refer to K45 Powertrain Control Module: Programming and Setup in SI .
NOTE:
The screenshot above is an example of module programming and may not be indicative of the specific module that is being programmed. Module selection and VIN information have been blacked out.

IMPORTANT:
To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the Warranty Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the screen.
Record SPS Warranty Claim Code on job card for warranty transaction submission.

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WARRANTY INFORMATION

For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.

Labor Operation	Description	Labor Time
*2887798	PCM Reprogramming for SDAC Limit	0.4 hr
This is a unique Labor Operation for Bulletin use only. IMPORTANT: *To avoid warranty transaction rejections, carefully read and follow the instructions below: The Warranty Claim Code must be accurately entered in the "Warranty Claim Code" field of the transaction. When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty Claim Codes in the "Correction" field on the job card. Dealers must also enter one of the codes in the "Warranty Claim Code" field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS2.
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Warranty Claim Code Information Retrieval

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If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as follows:

Open TLC on the computer used to program the vehicle.
Select and start SPS2.
Select Settings (1).
Select the Warranty Claim Code tab (2).

The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code field.

SERVICE INFORMATION

Version	2
Modified	Released July 11, 2024 Revised July 30, 2024 - Added Chevrolet Traverse engine RPO, revised Condition and Correction sections.