21NA131

Bulletin No.:
Service Bulletin
Date:
21-NA-131
January, 2022
TECHNICAL
Subject:
Memory Seat Module Does Not Adjust and/or Seat Only Slightly Moves when Seat
Switch is Activated
Brand:
Model:
Buick
Envision
CT4
Cadillac
CT5
Escalade
Escalade ESV
Corvette
Chevrolet
Suburban
Tahoe
GMC
Yukon
Yukon XL
Model Year:
from
to
2021
2021
VIN:
from
to
—
—
Engine:
Transmission:
—
—
2020
2021
2021
2020
2021
2021
2021
2021
2021
Involved Region or Country
North America, Middle East
Condition
Some customers may comment on one or more of the following conditions:
• Auto Entry/Exit is intermittently or consistently inoperable.
• The seat may intermittently not recall or exit despite the personalized settings
being set.
• Limited seat movement in one direction (specifically unable to move the recline axis).
• The driver seat back will not recline or the seat will not move to the full rearward or
forward position.
• Seat only slightly moves when seat switch is activated.
A technician may find a Service Driver Assist message or Super Cruise drops out
intermittently and the External Object Calculation Module (EOCM) sets a DTC against the
Memory Seat Module (MSM).
• U0211 Lost Com
• U0512 Invalid data
Cause
The cause of the condition may be a software anomaly in the Driver Seat Adjuster
Memory Module.
Correction
Reprogram the Driver Seat Adjuster Memory Module.
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.
Copyright 2022 General Motors LLC. All Rights Reserved.
•
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.
Page 2
January, 2022
Bulletin No.: 21-NA-131
•
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 12V 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.
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January, 2022
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5644477
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January, 2022
Bulletin No.: 21-NA-131
5431207
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 Information section of this bulletin.
1. Reprogram the Driver Seat Adjuster Memory
Module. Refer to K40D Driver Seat Adjuster
Memory Module: Programming and Setup in SI.
Bulletin No.: 21-NA-131
January, 2022
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January, 2022
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. Record the SPS Warranty Claim Code on the 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
2887358*
Driver Seat Adjuster
Memory Module
Reprogramming for Seat
Adjustment Failure
0.3 hr
Bulletin No.: 21-NA-131
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 TLC/TIS 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.
*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.
Version
2
Modified
Released June 02, 2021
Revised January 14, 2022 — Added New Condition of Seat only Slightly Moving when
Activated.
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.
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