Bulletin No.:

Service Bulletin

Date:

23-NA-034
March, 2023

TECHNICAL
Subject:

Radio Software Version Y167 – Multiple Updates for IOK

This Service Bulletin is replacing PIT5976. Please discard all previous copies of PIT5976.

Brand:

Chevrolet

GMC

Model:

Model Year:
from

to

Silverado 1500 New
(RPO J22, VIN Digit
5 = A / D)

2022

2022

Silverado 1500

2023

2023

Suburban

2022

2023

Tahoe

2022

2023

Sierra 1500 New
(RPO J22, VIN Digit
5 = H / U)

2022

2022

Sierra 1500

2023

2023

Yukon
Yukon XL

2022

2023

VIN:
from

Engine:

Transmission:

to

Involved Region or Country

United States, Canada, Mexico, Uzbekistan, Russia, Middle East, Argentina (Mercosur),
Bolivia (West), Chile (West), Colombia (West), Ecuador (West), Paraguay (West), Peru
(West), Uruguay (West), Cadillac Korea (South Korea), Thailand (ASEAN), Australia/New
Zealand

Additional Options (RPOs)

Equipped with RPO IOK

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 Y167, was released to service for vehicles
equipped with Infotainment system RPO IOK. 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, vehicles in
unconnected markets, and 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.

Y167 Most Notable Improvements
Important: Improvements will vary by model, build
configuration, system, and sales region. Not all
vehicles have all features.

Copyright 2023 General Motors LLC. All Rights Reserved.

Most notable improvements contained in this release
may include:
A. Radio:
• AM or FM station stuck for an ignition cycle
• No rear view camera
• After performing a factory reset the physical
Home button might not work
• Intermittent XM unavailable message

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March, 2023

• Intermittent no audio at startup
• The volume bar pop-up screen might not show
when adjusting the volume
• Voice recognition might not work
• When trying to sign in with a GM account the
sign in through Mobil App does not work
• Latitude gauge goes up and down
• Tune knob might not change channels
• Customer is unable to add XM favorites
• Voice volumes will not change, only audio
volume does
• The Now Playing screen might not show the
station number of the channel playing
• When changing Favorite pages the > button
does not highlight when pressed
• When trying to log in with a myGMC account,
there is no error if the email format is incorrect
• In the towing app the wrong vehicle type is
shown
• Intermittently there will be no audio
• Buckle to Drive might always be on
• Intermittent rebooting with Device is Starting
message
• XM favorite channels jump when using the SWC
• Improve readability of MyBrand application
• XM can only play one channel, the rest show
Unavailable in the browse list
• XM favorites are greyed out
• Invisible Trailer View Not Functioning
• When adding a new user there may be multiple
blank screen
B. Phone:
• CarPlay might stop after ending a call
• When switching audio from Bluetooth to USB the
Bluetooth audio might continue
• The Add Phone button might not work
• When making a call, the Search Contacts screen
might come up instead of the keypad
• Android Auto screen slow at launch
• The First to Connect setting might not save after
an ignition cycle
• CarPlay would not launch
• Contacts still show after clearing phone numbers
• After shutting the vehicle off the Handset button
for moving an active call is not highlighted
• Phone calls might have audio echo on the other
end of the call (not in vehicle)
• Phone projection may not connect
• CarPlay might be slow to launch

Bulletin No.: 23-NA-034

C. IPC:
• The incorrect language might show on the DIC
• Dyno Page graph not updating while idling
• V-mode shown in Drive mode of non-Cadillac
vehicles
• In the Drive Mode pages there is Z-mode when it
shouldn't be
• The sound for the turn signals is out of sync with
the cluster indicators
• Intermittently "Turn your vehicle on" shows on
ICS even with vehicle on
D. OTA:
• An Over-The-Air update might take a power
cycle to complete
• There is a black screen if the back button is
pressed while performing an update

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 12 V 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.

Bulletin No.: 23-NA-034

March, 2023

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
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.

Page 3

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March, 2023

Bulletin No.: 23-NA-034

Caution: Be sure the VIN selected in the drop down
menu (1) is the same as the vehicle connected (2)
before beginning programming.

5743643

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

5877000

Bulletin No.: 23-NA-034

March, 2023

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5644477

Important: Techline Connect screens shown above.
Important: If the same calibration/software warning is
noted on the TLC 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. No further action is required. Refer to
the Warranty section of the bulletin.
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 Y167 or greater, this
bulletin does not apply.
• If the build number is less than Y167, update
the radio software.
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.

Caution: to avoid potential programming errors that
might result in a Cadillac splash animation being
displayed on non-Cadillac models, ensure both
programming events (Programming and USB File
Transfer) are performed.
2. Install the software update via USB. Refer to A11
Radio: Programming and Setup in the Service
Manual.

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March, 2023

Bulletin No.: 23-NA-034

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.
3. Record SPS Warranty Claim Code on job card for
warranty transaction submission.

Bulletin No.: 23-NA-034

March, 2023

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

Description

Labor Time

*2889388

Update Radio Software to Y167 Multiple Updates

0.6 hr

*This is a unique Labor Operation for Bulletin use only.
Important: **To avoid warranty transaction rejections, carefully read and follow the instructions below:

6125814

•
•

The Warranty Claim Code must be accurately entered in the “Warranty Claim Code” field of the transaction.
When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty
Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the “Warranty Claim Code”
field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS2.

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March, 2023

Bulletin No.: 23-NA-034

Warranty Claim Code Information Retrieval

6125774

If the Warranty Claim Code was not recorded on the
Job Card, the code can be retrieved in the SPS2
system as follows:
1. Open TLC on the computer used to program the
vehicle.
2. Select and start SPS2.
3. Select Settings (1).
4. Select the Warranty Claim Code tab (2).
The VIN, Warranty Claim Code and Date/Time will be
listed on a roster of recent programming events. If the
code is retrievable, dealers should resubmit the
transaction making sure to include the code in the SPS
Warranty Claim Code field.
Version

2

Modified

Released March 08, 2023
Revised March 22, 2023 – Removed 2022 Silverado/Sierra 1500 RPO J21 Models

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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