22-NA-147
Service Bulletin Details
Public Details for: 22-NA-147
This technical bulletin provides repair information to correct a customer concern of service 4a??Wheel drive message illuminated in dic with dtc C15AC set.
Models from 2023
2023 CHEVROLET SILVERADO 2500 |
2023 CHEVROLET SILVERADO 3500 |
2023 GMC SIERRA 2500 |
2023 GMC SIERRA 3500 |
Models from 2022
2022 CHEVROLET SILVERADO 2500 |
2022 CHEVROLET SILVERADO 3500 |
2022 GMC SIERRA 2500 |
2022 GMC SIERRA 3500 |
Models from 2021
2021 CHEVROLET SILVERADO 2500 |
2021 CHEVROLET SILVERADO 3500 |
2021 GMC SIERRA 2500 |
2021 GMC SIERRA 3500 |
Models from 2020
2020 CHEVROLET SILVERADO 2500 |
2020 CHEVROLET SILVERADO 3500 |
2020 GMC SIERRA 2500 |
2020 GMC SIERRA 3500 |
Service Bulletin Bulletin No.: 22-NA-147 Date: April, 2023 TECHNICAL Subject: Service 4–Wheel Drive Message Illuminated in DIC with DTC C15AC Set Brand: Model: Chevrolet GMC Model Year: Breakpoint: from to from to Silverado 2500HD/3500HD 2020 2023 SOP Built prior to July 1, 2022 Sierra 2500HD/3500HD 2020 2023 SOP Built prior to July 1, 2022 Engine: Transmission: Involved Region or Country United States Additional Options (RPOs) Equipped with RPO NQF Condition Some customers may comment on Service 4-wheel drive message on the DIC (Driver Information Center). Technician may find DTC C115AC current or in history. Cause The cause of the condition may be software anomalies with the Transfer Case Control Module. Correction Verify the software in the Transfer Case Control Module. • If the TCCM isn’t up to date then reprogram the TCCM, refer to the Service Procedure below. • If the TCCM has the latest software update, them complete a Transfer Case Actuator Learn Procedure. 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. Copyright 2023 General Motors LLC. All Rights Reserved. • • • • 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 Please verify that the radio time and date are set correctly before inserting USB drive into vehicle for programming, otherwise an error will result.. Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/ Maintenance (I/M) system status indicators to NO. Page 2 April, 2023 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. • The Engine Control Module (ECM) is the master module (for VIP vehicles) that TLC reads to determine the VIN of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the ECM also needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate. • The Body Control Module (BCM) is the master module (for GEM vehicles) that TLC reads to determine the VIN of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the BCM also needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate. Bulletin No.: 22-NA-147 Bulletin No.: 22-NA-147 April, 2023 Page 3 Caution: Be sure the VIN selected in the drop down menu (1) is the same as the vehicle connected (2) before beginning programming. 5743643 Important: If the vehicle VIN DOES NOT match, the message below will be shown 5877000 Page 4 April, 2023 Bulletin No.: 22-NA-147 5644477 Important: Techline Connect and TIS2WEB screens shown above. Important: If the same calibration/software warning is noted on the TLC or SPS 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. 1. Reprogram the Transfer Case Control Module. Refer to Transfer Case Control Module Programming and Setup in SI. Bulletin No.: 22-NA-147 April, 2023 Page 5 5644478 Note: The screenshots above are 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. 2. Record Warranty Claim Code on job card for warranty transaction submission. Page 6 April, 2023 Bulletin No.: 22-NA-147 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 *2888868 Transfer Case Control Module Reprogramming with SPS for Service 4-Wheel Drive Message 0.5 hr *2889478 Transfer Case Actuator Learn Procedure for DTC C15AC 0.3 hr *This is a unique Labor Operation for Bulletin use only. Important: **To avoid warranty transaction rejections, carefully read and follow the instructions below: 6125814 • • The Warranty Claim Code must be accurately entered in the “SPS 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 “SPS Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS/SPS2. Bulletin No.: 22-NA-147 April, 2023 Page 7 Warranty Claim Code Information Retrieval If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as follows: 6125774 1. Open TLC on the computer used to program the vehicle. 2. Select and start SPS2. 3. Select Settings. 4. Select the Warranty Claim Code tab. 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. Version 2 Modified Released July 26, 2022 Revised March 27, 2023 – Updated Labor Time and added additional Labor Operation under Warranty Information GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION