Bulletin No.: 24-NA-038

Service Bulletin

Date: July, 2024

TECHNICAL
Subject:

Brand:

Cadillac

Radio Software Version W27E-172.5.1-M169-SQBR4-126.3

Model:

LYRIQ

Model Year:

VIN:

from

to

from

to

2023

2023

—

—

Engine:

Transmission:

—

—

Involved Region or Country

North America

Additional Options (RPOs)

Equipped with Infotainment System 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 due to software anomalies.

Correction

A new radio software update, version W27E-172.5.1-M169-SQBR4-126.3, 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.

Most Notable Improvements:

• Add Phone button not responding

Radio:

• Welcome animation freezes

• Stability improvements
• RVC does not work or shows red triangle
• Delayed RVC bring up
• Cannot launch Android Auto/Apple CarPlay
• Infotainment lockout while driving not working
• HVAC screen missing icons/text
• Bad audio quality
• (Cadillac only) MFC press not functioning
• (Cadillac only) MFC focus issue
• CarPlay black screen
• No Audio
• Radio stays on Bluetooth instead of Android Auto/
Apple CarPlay
• Virtual Controls not responding when pressed
during welcome animation

Copyright 2024 General Motors. All Rights Reserved.

• Camera view selection not available
• Overspeed chime does not continuously play
• Pop Up Window layout issues
• Welcome animation plays twice after quick door
open ignition on
• Reset Trip not functioning
• Add profile stuck loading
• Universal Remote settings do not respond correctly
• Ambient Lighting app crashes
• Ambient lighting app not working
• Ambient Lighting missing audio selection feedback
• Forward camera exits at speeds lower than target
speed
• Radio does not respond/freezes
• Driver settings not being saved

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July, 2024

Bulletin No.: 24-NA-038

• Trailering Light Test screen stuck

• Trailering total mileage not updating

• Android Auto display shifted on the screen

• Turn By Turn error message displays incorrectly

• Android Auto/Apple CarPlay won't launch after
switch user

• Cannot open virtual controls window

• Profiles page blank after deleting new profile

• VCU stuck in GUEST user

• Radio resets after sleep cycle
• Audio app crashes

• Virtual controls do not respond when camera view
is up

• RVC stays on incorrectly

• Can't dismiss pop ups

• Audio does not lower for notifications

• Voice search not available when driving

• Switching themes not working

• Can't sign into Google Play Store

• (EV only) Audio issues when using MaxPower
Mode

• Window position Virtual Controls not working

• User account name not updating

• Tire pressure not updating (vehicle info)

• CarPlay screen changes to home screen on its
own

• Audio plays during a call

• XM not available

• Audio settings page layout errors

• (EV only) Charge battery pop up does not come up
when using Max Power below SOC level

• Blank screen when pushing back button on teen
driver add key pop up

• Audio stuck on Bluetooth source

• Virtual Lighting controls not functioning

• Climate app not functioning

• Wrong units shown

• Camera DTC B1C47 set incorrectly

• Temperature on radio display not updating

• Connect Phone list dialog box shows excess
material

• OnStar TBT starting audio sometimes does not
play

• Crash from SXM Browse Screen

• Bluetooth media continues playing after source
change

• Phone app unresponsive to touch

• Pop up disappears too quickly

• Date/Time display errors out when turning off
vehicle

• Bluetooth media not shown when phone
connected

• Podcasts show default album art

• Pop ups not appearing

• Presets change order after key cycle

• Profile loading repeats

• Bluetooth media queue not correctly showing

• Radio app layout errors

• Radio crashes when long pressing power button
• Bluetooth not working

• Radio display defaults to Virtual Controls screen on
ignition

• Bluetooth will not reconnect

• Radio does not retain last screen after sleep cycle

• Button layout errors

• Driver PIN is not cleared after software update

• Radio sets DTC B1596.82 with no impact to RVC
function

• Radio presets not working

• RVC Launches On Its Own

• Embedded apps not updating

• Camera app exit and view selection buttons don't
come up

• Radio stays on around 20 seconds after vehicle
shutdown

• Some buttons do not respond

• Embedded Maps app view distorted

• Camera app layout and views distorted

• RVC does not brighten in dim settings

• System settings not retained over key cycle
• Camera view selection not available

• Emergency announcement does not interrupt
audio from other sources

• Theme cards missing

• RVC screen flickering

• Cameras do not close while driving or when in park
• Trailer profile notifications persist

• Emergency announcement does not interrupt
audio from other sources

• Cannot control Ambient Lighting

• RVC screen flickering

• Radio resets during emergency call

Bulletin No.: 24-NA-038

July, 2024

Page 3

• Exit "X" button not working on some apps

• Navigation crashes

• Service tire pressure monitor message shown
incorrectly

• No data on connected devices

• External Wi-Fi password not saved

• Camera UI not responding after shift from PARK

• Favorites window shifting

• Camera gridlines incorrectly sized

• QuickStartUp fails to resume

• OnStar call stuck on connecting screen

• Geofencing creation issues

• OnStar missing location notification during calls

• SXM favorites do not play audio

• Climate app not functioning with pop up "vehicle
must be running" when vehicle is already running

• Geofencing positioning errors
• Teen driver options not responding
• Google Assistant pop up does not display
• Third party app not shown on new user profile

• Radio display start up animation failed

• Radio loses some connected services function
after factory reset
Phone:

• Google Maps freezes when editing route during
route calculations

• CarPlay audio still through vehicle when toggled to
phone

• Traffic Signal Recognition telltale not following
driver setting

• Phone auto-connect not functioning after profile
change

• Trailering app crashing

• Incoming call alert not shown when in another call

• HVAC menu doesn't provide feedback when
changing fan speed

• Android Auto shows wireless charging icon incorrectly

• Trailering notification missing

• Text messages pop up not shown in vehicle

• HVAC Temp Knob doesn't respond
• Trailiering app crashing

• Bluetooth audio lost after voice assistant long
press

• Incorrect Google Map data shown

• "Add Phone" button not working

• Incorrect information when on two calls

• No sound when using Android Auto