Page 4 January, 2024 Bulletin No.: 23-NA-222
• Quickly switching between Cluster views causes
display failures/hang ups.
• (Cadillac only) Radio display flickers after
using MFC.
• 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" messag e 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 SW update.
• Blank screen during USB programm ing.
• 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.
Charging 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
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.
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 download ing 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.gmdesoluti ons.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.
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