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NHTSA ID Number: 10250509

Manufacturer Communication Number: 23-NA-227

TSB/Document Date: 2024-02-23


Summary

This technical bulletin provides repair information to correct a customer concern of Radio Software Version W27E-172.5.1-M169-SQBR4-126.1 – Multiple Updates for IVD.


Bulletin No.:

Service Bulletin

Date:

23-NA-227
February, 2024

TECHNICAL
Subject:

Radio Software Version W27E-172.5.1-M169-SQBR4-126.1 – Multiple Updates for IVD
& IVE
This Technical Service Bulletin replaces PIT6092. Please discard PIT6092.

Brand:
ChevroleteBay logo

Model:
Blazer EV
Silverado EV

Model Year:
from

to

2024

2024

VIN:
from

Engine:

Transmission:

to

Involved Region or Country

North America

Additional Options (RPOs)

Equipped with RPO IVD and IVE.

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-SQBR4-126.1, 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 contained in this release may include:

Notable Improvements:
Radio:
• Stability improvements
• RVC does not work or shows red triangle
• Delayed RVC
• Cannot launch Android Auto/Apple CarPlay
• Infotainment lockout while driving not working
HVAC screen missing icons/text
• Bad audio quality
CarPlay black screen
• No Audio
• Radio stays on Bluetooth instead of Android Auto/
Apple CarPlay
Copyright 2024 General MotorseBay logo LLC. All Rights Reserved.











Virtual Controls not responding when pressed
during welcome animation
Add Phone button not responding
Welcome animation freezes
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

Page 2










































February, 2024

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
Trailering Light Test screen stuck
Android Auto display shifted on the screen
Android Auto/Apple CarPlay won't launch after
switch user
Profiles page blank after deleting new profile
Radio resets after sleep cycle
Audio app crashes
RVC stays on incorrectly
Audio does not lower for notifications
Switching themes not working
(EV only) Audio issues when using
MaxPower Mode
Tire pressure not updating (vehicle info)
Audio plays during a call
Audio settings page layout errors
Blank screen when pushing back button on teen
driver add key pop up
Virtual Lighting controls not functioning
Wrong units shown
Temperature on radio display not updating
OnStar Turn by Turn starting audio sometimes
does not play
Bluetooth media continues playing after source
change
Pop up disappears too quickly
Bluetooth media not shown when phone
connected
Presets change order after key cycle
Bluetooth media queue not correctly showing
Radio crashes when long pressing power button
Bluetooth not working
Bluetooth will not reconnect
Button layout errors
Radio sets DTC B1596.82 with no impact to RVC
function
RVC Launches On Its Own
Camera app exit and view selection buttons don't
come up
Some buttons do not respond
Camera app layout and views distorted
System settings not retained over key cycle
Camera view selection not available
Theme cards missing
Cameras do not close while driving or when
in park
Trailer profile notifications persist
Cannot control Ambient Lighting













































Bulletin No.: 23-NA-227

Trailering total mileage not updating
Turn by Turn error message displays incorrectly
Cannot open virtual controls window
User account name not updating
VCU stuck in GUEST user
Virtual controls do not respond when camera view
is up
Can't dismiss pop ups
Voice search not available when driving
Can't sign into Google Play Store
Window position Virtual Controls not working
CarPlay screen changes to home screen on
its own
XM not available
(EV only) Charge battery pop up does not come
up when using Max Power below SOC level
Audio stuck on Bluetooth source
Climate app not functioning
Camera DTC B1C47 set incorrectly
Connect Phone list dialog box shows excess
material
Crash from SXM Browse Screen
Phone app unresponsive to touch
Podcasts show default album art
Date/Time display errors out when turning off
vehicle
Pop ups not appearing
Profile loading repeats
Radio app layout errors
Radio display defaults to Virtual Controls screen
on ignition
Radio does not retain last screen after sleep cycle
Driver PIN is not cleared after software update
Radio presets not working
Radio resets during emergency call
Embedded apps not updating
Radio stays on around 20 seconds after vehicle
shutdown
Embedded Maps app view distorted
RVC does not brighten in dim settings
Emergency announcement does not interrupt
audio from other sources
RVC screen flickering
Exit "X" button not working on some apps
Service tire pressure monitor message shown
incorrectly
External Wi-Fi password not saved
Favorites window shifting
QuickStartUp fails to resume
Geofencing creation issues
SXM favorites do not play audio
Geofencing positioning errors
Teen driver options not responding
Google Assistant pop up does not display

Bulletin No.: 23-NA-227





































February, 2024

Third party app not shown on new user profile
Google Maps freezes when editing route during
route calculations
Traffic Signal Recognition telltale not following
driver setting
Trailering app crashing
HVAC menu doesn't provide feedback when
changing fan speed
Trailering notification missing
Trailiering app crashing
HVAC Temp Knob doesn't respond
Incorrect Google Map data shown
Incorrect information when on two calls
Turn signal sounds plays incorrectly
Incorrect pop up for Auto Park Assist cancellation
USB auto-rejected for corrupt song
Incorrect translation
VCU resets and U164E set in multiple modules
Vehicle image missing in Vehicle Info app

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TSB/Document ID: 23-NA-227

Replacement Service Bulletin Number:

MFR Communication Date: 2024-02-06

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ELECTRICAL SYSTEM

MFR Component System:

MFR Component Subsystem:


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