24-NA-056

Bulletin No.: 24-NA-056
Service Bulletin
Date: April, 2024
TECHNICAL
Subject:
Brand:
Radio Software Version W27E-172.5.1-M169-SQBR4-126.4
Model:
Model Year:
from
to
Cadillac
LYRIQ
2024
2024
Chevrolet
Blazer EV
2024
2024
VIN:
from
Engine:
Transmission:
to
Involved Region or Country
North America
Additional Options (RPOs)
Equipped with RPO IVD
Condition
Some customers may comment on software related issues. Continuous improvement
software updates are being released with improvements made in several areas.
Cause
The cause of the condition may be software anomalies.
Correction
A new radio software update, version W27E-172.5.1-M169-SQBR4-126.4, was released
to service for vehicles equipped with Infotainment system RPO IVD being brought into
the service department. In addition to providing general robustness and stability enhancements, this update includes all enhancements from previous software version releases.
Along with the vehicles mentioned above; fleet customers may need the dealer to reprogram the radio with the new software package.
This new radio software update has been released via an Over-the Air-Update. Customer
will receive a Software Update notification once the software has been downloaded to
their vehicle. Customers need to accept the OTA when prompted.
Caution: to avoid potential programming errors, ensure both programming events (Programming and USB File Transfer) are performed.
Important: Improvements will vary by model, build configuration, system, and sales region. Not all vehicles have all features.
Important: Blazer EV ONLY: when updating radio please refer to N242436241 for labor
time information.
Important: LYRIQ ONLY: when updating radio refer to PIT 6065 for labor time information.
Notable Improvements:
• Virtual controls may not pop up on the radio
display.
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.
Copyright 2024 General Motors. All Rights Reserved.
Important: This technical service bulletin (TSB) can
only be completed by certified repair facilities who
have met all specific training, tool and equipment
requirements pertaining to the vehicle Brand and
Model serviced. Repairs must be performed by a
technician who has successfully completed the
required training.
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
Page 2
April, 2024
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.
• 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.
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
Bulletin No.: 24-NA-056
“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.
Caution: Be sure the VIN selected in the drop down
menu (1) is the same as the vehicle connected (2)
before beginning programming.
Bulletin No.: 24-NA-056
April, 2024
Page 3
5743643
Important: If the vehicle VIN DOES NOT match, the
message below will be shown
5877000
Page 4
April, 2024
Bulletin No.: 24-NA-056
5644477
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.
1. Reprogram the Radio. Refer to A11 Radio:
Programming and Setup.
Bulletin No.: 24-NA-056
April, 2024
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.
2. Record SPS Warranty Claim Code on job card for
warranty transaction submission.
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.
Warranty Information
Labor Operation
Description
Labor Time
9107074*
For Blazer EV refer to N242436241 for labor time information.
2889878* / 2888068
For LYRIQ refer to PIT6065 for labor time information.
Use Published Labor Operation Time
Version
2
Modified
Released March 20, 2024
Revised April 26, 2024 - Added Cadillac LYRIQ and reference for proper labor time.
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