Bulletin No.: 24-NA-136

Service Bulletin

Date: July, 2024

TECHNICAL
Subject:

Brand:

Cadillac

Radio Software Version is W38E-174.4.1-M170-SQBR5-180.5

Model:

XT4

Model Year:

VIN:

from

to

from

to

2024

2024

—

—

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 software anomalies.

Correction

A new radio software update, version is W38E-174.4.1-M170-SQBR5-180.3, 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.
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 contained in this release
may include:
Camera:
• The screen may go black when in a camera view
• Camera views may overlap

• The heated seat screen may overlay the Rear
View Camera
• The Parking Assist may not show indicators
• The Rear View Camera may be slow to load
• The side camera angles may be incorrect
• When the radio loses the speed signal the camera
view will go away

• Cargo Bed Camera is not mirrored

• While using Automated Park Assist there may not
be a camera view

• Cargo Bed Camera may not be available

• Delayed camera screen

• False pedestrian notification on Rear View Camera

• Blank screen with grid lines

• Intermittently the Rear View Camera will show the
no camera icon

• Rear View Camera image freezes for a short
period

• May not be able to exit the camera app because
there is no menu or X button

• Green screen

• Rear View Camera may not work properly with
Quick Start Up on
• Rear View Camera always on
• Rear View Camera will not work properly
• The camera may flicker
• The cameras may not work after a cold boot

Copyright 2024 General Motors. All Rights Reserved.

• Front View Camera has Rear View Camera
viewing options
Display:
• "Your Audio will be Muted" message for Teen
Driver doesn't display
• B1D73-04 may set in the radio, along with DTCs in
the BCM for the VCD

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July, 2024

Bulletin No.: 24-NA-136

• Black screen

• Slow bootup time

• Drive mode titles and icons overlap

• Maps and/or audio app may crash

• Icon changes
• Not able to switch from Flow theme to V series
theme
• Pop-up message may not have icons
• Porch view may stop working
• Radio display may not dim at night
• SWC audio source change does not show on VCD
• The screen may be distorted when shifting from
Reverse to Drive
• Volume bar listed as Navigation instead of Voice
for OnStar call
• When switching from Driver to Guest, "tseuG"
shows on the status bar

Audio:
• Audio distorted
• Audio pauses during projection
• No audio
• Possible noise on startup
• Two sources playing audio at the same time
• When switching to the MaxPower drive mode the
audio may stop
• While a traffic announcement comes in while using
voice recognition the audio bar name will show
Announcement
• Customer may hear turn signal chime/clack without
turn signal active

• User may see "Update Failed. See dealer to
restore system" OR Black Screen

• No audio after phone call

• Brightness adjustment may not change screen
brightness

• No Bluetooth audio after starting Nav. route

• Rear HVAC control screen may be brighter than
set
• Radio hard buttons may not work
Cluster:
• Audio source list stuck on display
• Audio unavailable message
• Auto Start Stop icon overlaps speed when there is
a pop-up message
• Blank cluster display
• Cluster screen may freeze
• Map view may be slow to load
• DIC may overlap with gauge
• Navigation information may not show in Zone 3
• Cluster flickers
• Android icon pops up while switching cluster views
• Prevent ellipsis from showing on cluster
• Selected cluster view may not be saved after
vehicle shutdown

• At startup, Bluetooth audio is too loud

Phone:
• Removing the Text play buttons when Alexa is the
assistant
• Text messages might not be seen on display
• When CarPlay is connected you can't access
Alexa
• With CarPlay the first phone call of every ignition
cycle will cause CarPlay to disconnect
• Voice recognition pass through to the connected
phone may not work
• When trying to exit android auto, display goes
black
• CarPlay disconnects when radio is off and
passthrough voice recognition is activated
• Phone app will not launch while wired android auto
is connected
• Delete paired device confirmation appears twice
• Apple CarPlay and Android Auto will disconnect
after about 5 minutes

• Best fuel economy is blank

• When Bluetooth is not the audio source there is no
audio chime for incoming text messages

• Audio message appears over gauges when
creating new user profile

• Wired Android Auto might reconnect instead of
Bluetooth

• The vehicle ahead green telltale may overlap with
the speed info

• Bluetooth may not reconnect

Stability:
• Lagging
• Radio may not fully shut down, but looks off
• Radio may reset while the camera views keep
being switched

• Voice Recognition pass through has no audio
response
• An incoming Bluetooth call ringtone might have a
sound when answering

Bulletin No.: 24-NA-136

July, 2024

Virtual Controls:
• Customer will be unable to rename garage door

Page 3

• The LCDD write can take too long
Radio:

• HVAC virtual controls might not work

• Battery drains from radio of 3A

• May not be able to exit the Virtual Controls app

• Customer may see an Error 302 causing them to
have to log in every 30 minutes

• The Virtual Controls app can be opened with the
radio off
• The Virtual Controls app may not open
• Headlight controls may be covered by HVAC
controls
• Ride height adjustment may not work
• Virtual controls, such as headlights, may not work
Other Apps:
• The MyBrand app may not launch

• Radio may not leave Quick Start Up mode and go
to off
• Radio may not turn off when RAP is cancelled
• Radio thinks the vehicle is in Drive so customer is
unable to access pages where the vehicle must
be in Park
• The radio may not power back on
Charging App:

• The Owner's Manual may have no information

• Charging app does not support Tesla stations

• Park Assist does not function

• IPD may still show charging for 10 seconds after
going into propulsion

• Tire pressure missing
• Trailer app may default to "lite" mode instead of full
mode, losing some options

• May not be able to open the Charging app
• May not be able to set the charge level

• Vehicle model may not show on vehicle status
screen

• When searching for nearby stations in the energy
app it may get stuck on the loading screen

• Vehicle information app crashes when pressing