Service Bulletin

Bulletin No.:

21-NA-188

Date:

June, 2022

TECHNICAL
Subject:

Radio Software Version V158 Update
This bulletin replaces PIT5829. Please discard PIT5829.

Brand:
Buick

Model:
Encore GX
Envision

Model Year:
from

to

2021

2022

2021

2022

VIN:
from

to

—

—

Engine:

Transmission:

—

—

CT4
(excluding China)
Cadillac

CT5
(excluding China)
XT4
XT5
XT6
Blazer

2021

Bolt EV
Camaro
Corvette

2022

2022

Equinox
Chevrolet

Malibu
Silverado 1500
SIlverado
2500HD/3500HD

2021

2021

Suburban
Tahoe
Trailblazer

2022

Acadia

2022

Sierra 1500
GMC

2021

Sierra
2500HD/3500HD
Terrain
Yukon
Yukon XL

2021

2022

2022

2021

2021

Copyright 2022 General Motors LLC. All Rights Reserved.

Page 2

June, 2022

Bulletin No.: 21-NA-188

Involved Region or Country

North America, Chile, Colombia, Ecuador, Peru, Paraguay, Uruguay, Europe, Middle
East, Israel, Palestine, Russia, Japan, Cadillac Korea (South Korea), GM Korea
Company, China, Thailand, Australia/New Zealand

Additional Options (RPOs)

Equipped with Infotainment Systems IOS, IOU or IOT

Condition

Some customers may comment on software related issues. Continuous improvement
software updates are being released with improvements made in several areas. V158
contains over 40 improvements. Refer to V158 Most Notable Improvements section
below.

Cause

The cause of the condition may be software anomalies.

Correction

A new radio software update, version V158, was released to service for vehicles
equipped with Infotainment system RPO IOS, IOU or IOT. In addition to providing general
robustness and stability enhancements, this update includes all enhancements from
previous software version releases. This update can occur remotely through in-vehicle
prompts from the radio display. However, some customers may decline the vehicle
update, or the update may be unsuccessful. Along with the vehicles mentioned above,
vehicles in unconnected markets, and fleet customers may need the dealer to reprogram
the radio with the new software package.

Important: Some technicians are reporting that the
radio remains on an older software version after the
radio displays the software update completed
successfully. 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 file 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 file name. In the middle of this
long file name you see the V158 (or numerically higher
if newer versions were released and installed).
Important: Improvements will vary by model, build
configuration, system, and sales region. Not all
vehicles have all features.
V158 Most Notable Improvements
Most notable improvements contained in this release
may include:
Bluetooth
• A blank or black screen may occur when making a
slight adjustment to volume knob
Camera
• Automatic Park Assist (APA) may not switch to the
360-degree camera view at times
• APA may not launch.
Note: It is normal, design-intent behavior for APA to
not launch while 360-degree view is active. This fix will
not change that.
Energy
• Improves graph format in Energy app
• After pressing the Stop Charging and Unlock
button the screen may not display a message that
charging has stopped and that vehicle can be
unplugged
• Charge completion time may display in an
incorrect color

•
•

If a user attempts to select Charging Options while
the vehicle is being driven, it does not display
feature unavailable while driving
After setting “Stop Energy At:” the Rate Schedule
Type may not change

HMI
• Non-responsive touch condition that self-recovers
after 3 minutes may occur after installing any app
• While downloading an app the characters in
notification that indicate time remaining may be
incomplete, the lower portion is missing
• While using wireless charging and after ending a
phone call CarPlay will show the phone is still
charging but the Home screen charging status
may not match
• Bluetooth phone signal and battery icons may
appear and disappear intermittently when
Performance Data Recorder (PDR) is active
IPC Interface
• A portion of the Press Handset overlay message
may be missing in the IPC
• After merging two phone calls, the IPC may
display a blank overlay box
Navigation
• When Head Up Display (HUD) transitions from
Next Maneuver overlay to Lane Assist the display
may flicker
• After changing Location Services from Off to On,
the Traffic Flow feature may not become active
• The navigation interface may change to 2D and be
inconsistent with Porch view display after sliding
on the Destination card
• A speed camera icon may intermittently disappear
and reappear on the map
• Improve navigation map data SD card VIN binding
process
• Improve, but not yet eliminate, an SD card
removed message that may occur only on startup
when using a customer’s User Profile
• The Speed Bump Alert may disappear at the
beginning of route guidance on certain
destinations

Bulletin No.: 21-NA-188
•

June, 2022

Voice Recognition button may appear in regions
that are not supporting the voice recognition
feature
• Charging station POIs may be displayed on the
opposite side of a roadway
• SD Card error message displayed with 0x8
error code
• Predictive navigation estimated time of arrival
(ETA) appears on radio, but may display dashes
on instrument cluster
• Navigation route may not start from Main screen if
user selected “xx minutes to Home” by steering
wheel controls in the clusters Navigation Menu
screen
• Alerts for Charge Vehicle Soon and Charge
Vehicle Now may not appear in the radios
Navigation app while the vehicle is being driven
but do appear in the cluster, and Charge Vehicle
Now does appear in radio if vehicle is stopped
• (Non-GMNA) When GPS signal is blocked
(example: parking structure) the dead reckoning
may not go active causing vehicle to have to
reacquire GPS location once leaving the structure
or area that blocked GPS signals
Settings
• Door Lock/Unlock customization settings for All
Doors or Driver Door Only may not be retained
• The Collision/Detection Systems customization
settings may be missing some options after
changing languages
• If in the Settings app when ignition is cycled off
then on, the Settings page may be blank
• While scrolling in the Climate and Air Quality
interface settings the display may flash
System
• After using the Infotainment Control Switch in the
center console to change the station in the Tune
screen, any input into the radio may change the
station again. Example: Pressing the Radio button
on the control switch to return to the Audio page or
shifting to Reverse to pull up the rearview camera
could cause the station to change again
• When attempting to adjust Lumbar position a
message that “Massage Seats Unavailable” may
appear for one to two minutes after startup. The
memory seat function will still recall Lumbar
settings
• At startup, the display may freeze on the myBrand
splash animation screen. A radio sleep cycle
recovers this condition
• Improve ethernet DTC diagnostic algorithms for
U1008, U18B4, and U0078
Trailering
• When launching Trailer app, some trailer profiles
may cause the display to go blank then return to
Home screen
Translations (Non-GMNA)
• Chinese language translation errors for utility rate
schedule type and engine sound
• Japanese language translation was incomplete

•
•

Page 3
Korean language translation error for target
charge completed
Russian language translation was incomplete or
contained unnecessary marks in Settings

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.
Caution: Before downloading 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.gmdesolutions.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
plate of the vehicle to be programmed prior to using
Service Programming System 2 (SPS2) for
programming or reprogramming a module.
• For the TLC application, service technicians need
to always ensure that the power mode (ignition) is
“ON” before reading the VIN from the vehicle’s
VIN master module and that they do not select a
VIN that is already in the TLC application memory
from a previous vehicle.
• If the VIN that shows up in the TLC top center
window after correctly reading the VIN from the
vehicle does not match the VIN plate of the
vehicle, manually type in the VIN characters from

Page 4

June, 2022

Bulletin No.: 21-NA-188

the vehicle VIN plate into the TLC top center
window and use these for programming or
reprogramming the subject module with the
correct vehicle VIN and software and/or
calibrations.
• The Engine Control Module (ECM) is the master
module (for VIP vehicles) that TLC reads to
determine the VIN of the vehicle. If the VIN read
from the vehicle by TLC does not match the VIN
plate of the vehicle, the ECM also needs to be
reprogrammed with the correct VIN, software and
calibrations that match the vehicle’s VIN plate.
• The Body Control Module (BCM) is the master
module (for GEM vehicles) that TLC reads to
determine the VIN of the vehicle. If the VIN read
from the vehicle by TLC does not match the VIN
plate of the vehicle, the BCM also needs to be
reprogrammed with the correct VIN, software and
calibrations that match the vehicle’s VIN plate.
Caution: Be sure the VIN selected in the drop down
menu (1) is the same as the vehicle connected (2)
before beginning programming.

5743643

Bulletin No.: 21-NA-188

June, 2022

Page 5

Important: If the vehicle VIN DOES NOT match, the
message below will be shown.

5877000

5644477

Important: Techline Connect screen shown above.
Important: If the same calibration/software warning is
noted on the TLC or SPS Summary screen, select OK
and follow screen instructions. After a successful
programming event, the WCC is located in the Service
Programming System dialogue box of the SPS

Summary screen. Document the WCC on the job card.
No further action is required. Refer to the Warranty
Information section of this bulletin.

Page 6

June, 2022

Bulletin No.: 21-NA-188

Important: It is normal operation of the Over-the-Air
(OTA) update process for a radio to remain on for 30
seconds after ignition is turned off and retained
accessory power (RAP) has been disabled. The radio
will return to normal power down operations, i.e. off
when RAP is disabled, once the OTA update has been
installed.
1. Inspect the current radio software version.
Navigate to Settings -> About -> Build Number ->
Information “i” to view and verify the software
version.
• If the build number is V158 or greater, this
bulletin does not apply.
• If the build number is less than V158, proceed
to Step 2.

5644478

Note: The screenshot above is an example of module
programming and may not be indicative of the specific
module that is being programmed. Module selection
and VIN information have been blacked out.
Important: To avoid warranty transaction rejections,
you MUST record the warranty claim code provided on
the Warranty Claim Code (WCC) screen shown above
on the job card. Refer to callout 1 above for the location
of the WCC on the screen.
Tip: Once the USB update is initiated, there is no need
to monitor the progress.
If an Infotainment over the air (OTA) update is present
in the radio Updates menu, check for and reference any
applicable field action bulletins first.

If the radio displays Conditions are not ideal, there are
many reasons this can display but be aware that stable
battery voltage is critical during programming. Any
fluctuation, spiking, over voltage or loss of voltage will
interrupt programming.
2. Install the software update via USB. Refer to A11
Radio: Programming and Setup in SI.
3. Record the Warranty Claim Code on the job card
for warranty transaction submission.

Bulletin No.: 21-NA-188

June, 2022

Page 7

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
2888168*

Description

Labor Time

Radio Reprogramming with
SPS/USB for V158 Update

0.6 hr

*This is a unique Labor Operation for bulletin use only.

Version

2

Modified

Released August 18, 2021
June 24, 2022 – Added the 2022 Model Year to certain vehicles and updated
Programming procedure.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.

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