Bulletin No.: PIC6425A
Published date: 12/23/2020

Preliminary Information
PIC6425A Radio Software Related Concerns
Models
Brand:

Model:

Model Years:

VIN:
from

to

Engine:

Transmissions:

Buick

Encore GX

2021

All

All

All

All

Buick

Envision

2021

All

All

All

All

Cadillac

XT4

2021

All

All

All

All

Cadillac

XT5

2021

All

All

All

All

Cadillac

XT6

2021

All

All

All

All

Chevrolet

Blazer

2021

All

All

All

All

Chevrolet

Camaro

2021

All

All

All

All

Chevrolet

Corvette

2021

All

All

All

All

Chevrolet

Malibu

2021

All

All

All

All

Chevrolet

Silverado

2021

All

All

All

All

Chevrolet

Trailblazer

2021

All

All

All

All

GMC

Acadia

2021

All

All

All

All

GMC

Sierra

2021

All

All

All

All

Involved Region or Country North America
Additional Options (RPO)

Equipped With Infotainment Systems IOS, IOU, or IOT

Condition

Some customers with involved radios using software version V152 or less may
comment on any one, or any combination of software issues listed below:

Advanced Parking Assist
• Screen freezes when searching for a parking spot
• Message to apply parking brake appears at incorrect time

Audio and Media
• When navigation prompt is playing and user attempts to adjust volume, the Audio
volume adjusts instead
• Switching from Bluetooth streamed audio to an OnStar call, the Bluetooth audio
volume increases for a short time before the OnStar ring tone is heard
• Radio may not switch to selected Favorite
• Improve vehicle graphics in Fade/Balance page
• Forward/Skip hard buttons change source while listening to SXM
• Loss of radio audio for entire drive cycle, chimes still function
• Unable to complete indexing of media when using iPhone as a USB playback
device (not in CarPlay)
• (Non-GMNA) iPhone using Baidu CarLife may display connection status incorrectly

Energy App

Energy App
• Improve Energy History graph display
• Incorrect Battery Gauge state of charge
• Improve main charging screen functionality
• Bottom of Charging setting pull down is not displayed
• Must press Save twice for Delayed Charge, or when removing the Home location
from Location Based Charging menu

HMI
• Improve multi-function controller interface
• Message pops up to switch to V-Mode or My Mode
• Device Remote Access has di erent font styles on the same page
• Cellular signal status displayed in Non-Connected countries
• Low resolution of startup splash animation
• Improved Air Quality status bar behavior
• Climate app has a delayed opening from the pop-up banner

IPC Interface
• Both Cancel and OK are highlighted when selecting an HD Favorite through
steering wheel controls while HD is turned o
• DIC displays “Loading” and the steering wheel controls are non-responsive if the
other person ends the call as the user is opening the DIC phone menu
• DIC menu ashes twice at times when scrolling through DIC media menus
• Head Up Display (HUD) shows OnStar or Phone information overlapping
displayed values
• IPC Help information may not display properly
• HUD continues to display OnStar call or Emergency call after the call has ended
• HUD may not display song information playing through Android Auto
• A comma in a Contact phone number may display as “ext.” instead of “,” in the DIC
• IPC is missing graphic for MyMedia when MyMedia is playing
• “Press Handset to switch call to phone” shows both options selected or
deselected at the same time
• “Press Handset to switch call to phone” may be truncated in display

Over-the-Air Update
• First attempt to install an OTA may fail, second attempt is successful but could
cause a battery drain
• Display may go black, ash, or back to the Update Available screen ve seconds
after selecting Install
• Display shows update failed after pressing power button although update was
successful
•

Display is black instead of showing Update Available screen

Rear Seat Infotainment
• Change text for Miracast and Bluetooth headphones to avoid confusion over
functionality
• Muted text is overlapping
• Audio page shows “Unreadable Device” instead of “No Content Available”
• Screen ash at times when reconnecting a Media Transfer Protocol (MTP) device

Phone

Phone
• Apple device audio playback improvement

Sirius XM
• SXM Browse does not display “action unavailable while driving”

System
• Performance Data Recorder robustness enhancements
• Cannot exit/unlock Valet mode
• OnStar phone can be selected as Outgoing and Incoming phone in device
manager
• Radio displays incorrect driver mode control visualization screen
• Drive mode popup displays when it is turned o
• Rename Favorite page displays abnormally
• Screen ashes when changing from Seat Massage to Home page
• Radio using software V152 may freeze

Navigation
• HUD navigation arrows cut o
• Korean street names truncated
• Tight Turn and Next Turn text are in wrong locations
• Missing some content in Highway mode
• Main navigation menu still displays old route after using X in the destination detail
view
• Turn by Turn shows previous information after a stop during the trip
• Day and Night theme may not switch properly at times
• Missing lane guidance or turn arrow

Blank IPC during navigation
• Setup Home does not appear after Terms and Conditions are accepted
• Translation (Non-GMNA)
• Errors in Energy app translations
• My Mode con guration title incorrect in Chinese
• “Day” is missing from Energy-Charging Settings screen
• Camera app did not translate “check your mirrors for safety” into Chinese
• Settings did not translate “request denied” into Chinese
• Consent pop-up did not translate “granting access allows %s to:” into Chinese

WiFi
•

Home screen task bar does not display 4GLTE

•

Very rarely an external device can connect to WiFi but have no internet access

Wireless Projection
• Radio freezes during phone call
• Displays “contacts still loading” when using voice recognition

No incoming call ring tone
• Switch to CarPlay, the radio and DIC show phone as Audio source, but radio is still
playing previous audio selection (e.g. SXM)
• CarPlay display goes black when a call is ended

• CarPlay displays continuous “loading” circle, screen goes black, and/or phone does
not connect
• CarPlay displays “Keyboard access limited” and will not load Google Maps
destination
• CarPlay is unable to initiate a phone call from navigation POI
• Android Auto cuts o navigation prompts
Cause

The cause of the condition may be software anomalies.

Correction:
Do not replace parts for these conditions. Verify the radio software is on V152. The next software release is in
development and should be available during the rst quarter of 2021. This PI will be replaced with a service
bulletin once the new software becomes available.

Service Procedure
Important: It is important to ensure that the technician is inspecting the full information found within Build
Number and not other rows of information on the same screen. This requires the user to locate the Build
Number, and then select the Information icon (circled lower-case i) to see the full software version le name. In
these radios, the build number may begin with a letter other than “V” but this is NOT the software version and is
not unique to the software release.
Important: After pressing the information icon, review the full software version le name. In the middle of this
long le name you see the V152 (numerically lower if the radio is not up to date, or numerically higher if newer
versions were released and installed).
Inspect the current radio software version. Navigate to Settings -> About -> Build Number -> Information icon
view and verify the software version.

to

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
2887118

Description
Labor Time
Verify vehicle is on V152 software version
0.3 Hrs
*This is a unique Labor Operation for Bulletin use only.

Version History
Version
Modi ed

2
12/22/2020 - PIC6425 Created on.
12/23/2020 - Updated Condition.

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