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Vehicle Software Update (VESCOM) (21-NA-044)

WARNING: This page is about the Yukon Denali, 3.0L Eng VIN T, 4WD, which is a different variant/trim than selected.
Publication date: 2021-05-10
Reference number: 21-NA-044

VEHICLE SOFTWARE UPDATE (VESCOM)

VEHICLE SOFTWARE UPDATE (VESCOM)

TECHNICAL SERVICE BULLETIN

Reference Number(s): 21-NA-044, Date of Issue:  May 10, 2021

SERVICE INFORMATION

Brand: Model: Model Year: VIN: Engine: Transmission:
from to from to
Chevrolet Suburban 2021 2021        
Tahoe
GMC Yukon 2021 2021        
Yukon XL
Involved Region or Country  North America
Additional Options (RPOs)   
Condition  Some customer 2021 SUVs need to receive the latest vehicle software configuration management (VeSCoM) software update.
Some of the notable messages and/or DTCs technicians may find in the DIC corrected through VeSCoM include:
  • U0132 Service Leveling or Service Headlamp
  • IPC- Intermittent Blank IPC
  • P2B87 AUX Water Pump
  • U0230 Power Liftgate Inoperative
  • U3006 and U3007 Low Voltage
  • Rear Seat Infotainment - Touch inoperative
  • U3000.49 Service Driver Assist - LRR
  • U3000.71.72.96Service Steering Column Lock ESCL
  • EBCM C0024 Antilock Brake System
  • P12A6 No Start - ECM
  • No Start/DIC/MIL - Low Battery Voltage
  • No Backup or 360 Cameras - VPM Offline
  • C2A21 Park Brake, EPB Light and "Service Transmission" after Low Voltage
  • No Start or MIL with U1962 Data Communications
  • Service Leveling System - No DTCs
Cause  The cause of the condition may be software anomalies.
Correction  Dealers will sequentially reprogram affected modules with service programming system (SPS) or techline connect (TLC).

SERVICE PROCEDURE

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.

NOTE:

Carefully read and follow the instructions below.

  • 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.
CAUTION:

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

GM5743643Courtesy of GENERAL MOTORS COMPANY
GM5644477Courtesy of GENERAL MOTORS COMPANY
GM5431207Courtesy of GENERAL MOTORS COMPANY
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 on-screen instructions. The system will generate a warranty claim code (WCC) for documentation purposes only. Perform service information (SI) diagnostics to determine the cause of the condition. Use the applicable labor operation code when submitting a warranty claim. Do NOT use the WCC with the warranty claim submission.

IMPORTANT:

When programming a module in GM's new Vehicle Intelligence Platform, or VIP, the power mode (ignition) needs to be off or errors may occur. This involves the 2020 Chevrolet Corvette, Cadillac CT5 and CT4, as well as the upcoming full-size Chevrolet, GMC, Cadillac SUVs and Buick Envision. Serial Data Message Authentication also needs to have the ignition off.

IMPORTANT:

This Field Action Sequence will not run Serial Data Message Authentication (SDAC) automatically at the end. If Authentication Serial Data DTC's are set, please reference Document ID: 5199706 in eSI DTC U1960-U1962, U3034, or U3035.

  1. Reprogram the sequential multiple modules through SPS/Techline Connect (SPS and Techline Connect screens shown) by selecting "ZFA - Multimodule Coordinated Sequence-Bulletin N202318500" on the select controller screen as shown. Select "Next" and follow all on screen instructions.
    GM5644478Courtesy of GENERAL MOTORS COMPANY
    GM5431209Courtesy of GENERAL MOTORS COMPANY
    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 SPS Warranty Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the SPS screen

  2. After programming is finished, open GDS2. Navigate to Vehicle Diagnostics -> Vehicle DTC information and clear codes in all modules.
  3. Record SPS Warranty Claim Code on job card for warranty transaction submission.

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
9700025* Sequential Module Reprogramming with SPS or TLC 1.1 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 "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.

Warranty Claim Code Information Retrieval 

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

  1. Open SPS/TLC on the computer used to program the vehicle.
  2. Select and start SPS/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.

SERVICE INFORMATION

Version  2
Modified  Released March 09, 2021
Revised May 10, 2021 - Updated Subject, Service Procedure, and Warranty Information sections.
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