Keyboard does not pop up when entering
password
Virtual Controls app will not open
LCDD provisioning fails and gets stuck
Virtual controls window sized incorrectly and cuts
off some buttons
Loss of all audio and chimes over key cycle
Voice assistant pop up stuck
Welcome animation missing vehicle model
Media app plays incorrect source
Wi-Fi name and password cannot be changed
WOW Mode animation not working
XM Media app shows "Unavailable" but music is
playing
MyBrand won't install
Navigation crashes
No data on connected devices
Radio display start up animation failed
Camera UI not responding after shift from PARK
Camera gridlines incorrectly sized
OnStar call stuck on connecting screen
OnStar missing location notification during calls
Climate app not functioning with pop up "vehicle
must be running" when vehicle is already running
Radio loses some connected services function
after factory reset
Active Noise Cancellation creating loud droning
and other audio abnormalities inside of vehicle

Phone:
• CarPlay audio still through vehicle when toggled
to phone
• Phone auto-connect not functioning after profile
change
• Incoming call alert not shown when in another call

•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•

Page 3

Android Auto shows wireless charging icon
incorrectly
Text messages pop up not shown in vehicle
Bluetooth audio lost after voice assistant long
press
"Add Phone" button not working
No sound when using Android Auto
Call Ended shown incorrectly when disabling call
profile
Phone pairing dialogue pops up every key cycle
Call timer shows negative value after call
reconnect
Cannot launch Android Auto/Apple CarPlay
Cannot repair Bluetooth devices
Text message notification sound not heard
CarPlay Siri does not work after SWC long press
radio reset
Phone screen shows blank when canceling in
progress Bluetooth pairing
Bluetooth audio start up volume too high
Bluetooth crashes when cable is unplugged
Bluetooth device listed twice in media
Cannot pair device as pair mode stuck OFF

Display:
• Radio Black Screen
• IPC and ICS info mismatch
• Cluster layout issues
• Blank Screens and/or Update Failed Screen after
low voltage/dead battery
• Speedometer not updating
• Both displays show a black screen
• No Touch Response on radio display
• Cluster screen flickers
• Radio display multiple overlaying screens
• Black radio screen at startup
• Delayed Cluster load
• Trailer Gain not shown on Cluster
• Blank Cluster display with telltales
• PRND stuck on reverse
• eAWD telltale not activating
• Radio Display Illumination Too Dark Compared to
Cluster Display
• Fuel Economy scale missing
• Cannot remove Cluster Info tile
• HUD black screen for key cycle
• CarPlay maps black screen on Cluster display
• HUD blank with radio setting B19B0
• Offroad display stuck on
• HUD missing info and not responsive
• Quickly switching between Cluster views causes
display failures/hang ups
• (Cadillac only) Radio display flickers after
using MFC

Page 4

February, 2024

•
•
•
•

HUD not working after deep sleep
Radio display loss of touch and erratic dimming
HUD settings not remembered
Speed Limit icon will not disappear when driver
setting set to Hide
• IPC and HUD info mismatch
• Cluster navigation option missing
• Blank Cluster display
• Transmission temperature gauge color on Cluster
shows red hot when vehicle is within operating
temperature range
• Cluster reset
• Lane lines don't show colored in Cluster Assist
layout
• Navigation route on Cluster display is not still
shown after ignition cycle with STR
• Android System message at start up
• HUD shows cruise at "0" instead of "–" when no
speed is set
• Vehicle info apps show "Add to Driver Display"
when already shown
• Display layout issues
• Drive mode app flickers when changing modes
• Pressing "Turn Off Display" can cause the display
to get stuck in a flickering/resetting cycle
• Service Display message and loss of radio screen
and virtual controls
Programming:
• "Update Unsuccessful" message stuck on until full
sleep cycle
• LCDD provisioning fails and gets stuck
• "Vehicle Software Updates are available" does not
show on every ignition
• Radio screen shows no icons after programming
• Speed limit shows dashes after software update
• Blank screen during USB programming
• USB recovery status bar shows on cluster display
• Cannot enable Quick Start Up after USB Update
• No success pop up or record of USB updates
Energy App:
• Charge Scheduling did not work
• Screen turns off when launching Charging app
• Charge app inoperable
• Missing dialogue info for charge complete/stopped
• Schedule home screen formatting issues
• Charging App cannot access data
• Cannot set charge level

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

Bulletin No.: 23-NA-227

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.
• 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.
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

Bulletin No.: 23-NA-227

February, 2024

Page 5

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.

5743643

Important: If the vehicle VIN DOES NOT match, the
message below will be shown

5877000

Page 6

February, 2024

Bulletin No.: 23-NA-227

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.

Bulletin No.: 23-NA-227

February, 2024

Page 7

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 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 SPS Warranty Claim Code on job card for
warranty transaction submission.

Page 8

February, 2024

Bulletin No.: 23-NA-227

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

*2886188

Update Radio to W27E-172.5.1-M169-SQBR4-126.1 via
USB/SPS

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:

6125814

•
•

The Warranty Claim Code must be accurately entered in the “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 “Warranty Claim Code”
field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS2.

Bulletin No.: 23-NA-227

February, 2024

Page 9

Warranty Claim Code Information Retrieval

6125774

If the Warranty Claim Code was not recorded on the
Job Card, the code can be retrieved in the SPS2
system as follows:
1. Open TLC on the computer used to program the
vehicle.
2. Select and start SPS2.
3. Select Settings (1).
4. Select the Warranty Claim Code tab (2).
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

3

Modified

Released December 22, 2023
Revised January 25, 2024 – Added the 2024 Chevrolet Blazer and RPO.
Revised February 05, 2024 - Changed Labor Operation under Warranty Information
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.

WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION