21-NA-182

Service Bulletin
Bulletin No.:
21-NA-182
Date:
May, 2022
TECHNICAL
Subject:
Radio System Settings Lost or Returning to Default Values
This bulletin replaces PIT5839C. Please discard PIT5839C and previous versions.
Brand:
Chevrolet
Model:
to
Blazer
2020
Camaro
2020
Colorado
2022
Equinox
2021
Malibu
2020
Silverado 1500
2021
Silverado
2500HD/3500HD
GMC
Model Year:
from
2020
Breakpoint Date:
from
2020
Trax
2021
Canyon
2022
Sierra 1500
2021
Sierra
2500HD/3500HD
2022
Terrain
2021
Engine:
Transmission:
—
—
—
January
1, 2022
SOP
—
2022
Sonic
to
January
1, 2022
SOP
—
Involved Region or Country
North America, Argentina, Brazil, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay,
Middle East, Israel, Palestine, Egypt, GM Korea Company, Thailand, Japan, Other Africa,
Australia/New Zealand
Additional Options (RPOs)
Equipped with Infotainment System (IOR)
Condition
Some customers may comment on any combination of the following Radio System
Settings being lost, not retained, or returning to a default value after the ignition is turned
off and the radio goes to sleep:
• Audio Tone Settings; including equalizer or EQ, Fade, Balance, or Sound Mode return
to a neutral, zero, or default value
• Language setting defaults back to English from any other language
• Radio Maximum Startup Volume has changed leading to a complaint the volume is
louder or not as loud as what it was during the previous drive cycle
Cause
The cause of the condition may be anomalies with software version V135118.
Note: Software was built into 2021 model year vehicles listed but may not be present in a
2020 model year vehicle unless the radio was reprogrammed or replaced and
programmed with the V135118 software version.
Correction
New radio software updates were released, version v135119 or higher.
Note: This update includes all enhancements from previous software version releases.
Copyright 2022 General Motors LLC. All Rights Reserved.
Page 2
May, 2022
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.
• 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 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.
• 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.
Bulletin No.: 21-NA-182
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.: 21-NA-182
May, 2022
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
May, 2022
Bulletin No.: 21-NA-182
5644477
Important: Techline Connect screen 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. Document the WCC on the job card.
No further action is required. Refer to the Warranty
Information section of this bulletin.
1. Reprogram the radio. Refer to A11 Radio:
Programming and Setup in SI.
Bulletin No.: 21-NA-182
May, 2022
Page 5
5644478
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 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.
Page 6
May, 2022
Bulletin No.: 21-NA-182
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
2888158*
Update radio to SW v135119
0.6 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 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.
Version
6
Modified
Released August 13, 2021
October 14, 2021 – Changing software version number listed in the Correction section
and Labor Operation Description.
November 05, 2021 – Added Chevrolet Equinox, Colorado, GMC Canyon, Terrain and
TAC supersede statement.
November 30, 2021 – Added the 2022 Model Year to Chevrolet Colorado, Silverado
2500HD/3500HD, GMC Canyon, Sierra 2500HD/3500HD, added the 2020 Chevrolet
Camaro model and Japan to Involved Region or Country section.
February 21, 2022 – Added the 2020 Chevrolet Blazer and updated the Service
Procedure programming.
April 27, 2022 – Added the Chevrolet Malibu, Sonic and Trax models and Breakpoint
Date to Chevrolet Colorado and GMC Canyon and updated Correction section.
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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