Bulletin No.:

Service Bulletin

Date:

23-NA-118
August, 2023

TECHNICAL
Subject:

Radio Software Version Y168 – Multiple Updates for IOK
This Bulletin Replaces PIT5977. Please Discard PIT5977.

Brand:

Model:

to

2022

2022

Silverado 1500

2023

2023

Silverado
2500HD/3500HD

2024

2024

2022

2023

2022

2022

Sierra 1500

2023

2023

Sierra
2500HD/3500HD

2024

2024

Yukon
Yukon XL

2022

2023

Silverado 1500 LTD
(RPO J21, VIN Digit
5 = W / Y)

Chevrolet

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

Suburban
Tahoe
Sierra 1500 Limited
(RPO J21, VIN Digit
5 = 8 / 9)

GMC

Model Year:
from

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

VIN:
from

Engine:

Transmission:

to

Involved Region or Country

North America, Europe, Uzbekistan, Russia, Middle East, Bolivia (West), Chile (West),
Colombia (West), Ecuador (West), Peru (West), Japan, Cadillac Korea (South Korea),
Thailand (ASEAN), Other Africa, Argentina, Brazil, Paraguay, Uruguay, Australia

Additional Options (RPOs)

Equipped with RPO IOK

Condition

Some customers may comment on radio 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

Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

Correction

August, 2023

Bulletin No.: 23-NA-118

A 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.
A new radio software update, version Y168, was also released to service for vehicles
equipped with Infotainment system RPO IOK 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, 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.

Y168 Most Notable Improvements:
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:
Radio
• When trying to use Google Assistant with Android
Auto and in offline mode, the card view may come
up for a second.
• When pressing the "View terms & data settings"
button the keyboard will flash.
• When switching languages, a "switch to trailer"
message might appear.
• Volume may be stuck on max.
• Tow Haul reminder may show up more than once
during an ignition cycle.
• The SXM Subscribe button is not greyed out while
driving.
• The trailering app may show a camera option
even if the trailer has no camera.
• The Off-road app may be in day mode while the
vehicle is in night mode.
• The customer is unable to open the Camera app
in Accessory mode.
• The customer may see an "Add New User"
pop-up.
• The customer might see a "Cannot Schedule
Update" message come up then disappear.
• The Engine Shift setting may flicker.
• The keyboard may be stuck on the screen when
leaving the account page.
• The Maps card view might be missing the button
to expand to full screen.
• Text may not change to night mode properly.
• The "Back" button may not work from the Trusted
Device page.
• The “Back” button may not work after ending
a call.
• SXM Favorites and On Demand unavailable.
• SXM may show "Loading" and have no audio.
• SXM On Demand content may not be displayed.
• If the customer is trying to move a favorite channel
while switching sources at the same time, the
audio app may crash.
• If voice recognition is launched while on the
password screen, the screen will close.

•

If you try to enter Drive Mode while the vehicle is
off, the app will not launch.
• In the Trailering app the tire sensor setup may
not work.
• Intermittently there may be no audio from one or
multiple speakers.
• On the Recent page there may be a keyboard
shown.
• If the Back button is pressed during a call the call
timer may disappear from the status bar.
• Dyno page values do not match graph.
• If the audio is muted, pressing the Previous or
Next buttons will unmute.
• After switching from a new user to Driver on the
Auto-lock user page the back button may
not work.
• Buckle to Drive is available for Fleet Driver.
• CarPlay may show the message "pair a phone"
when a phone is already paired.
• Channel tiles will show the channel name instead
of the short description.
• Chime volume changes may not work properly.
• Customer may not be able to use the SWC
Favorite switch for an ignition cycle.
• Customer may see a message to pair a phone to
make a call, even though a phone is connected.
• Favorites may not work.
• A message stating "Cannot manage favorites
while driving" may show a second time without
driver input.
• "Trailer Brake Gain Not Recalled" message
erroneously displayed.
• “Auto unlock User Profile” may get turned on
automatically after entering the wrong password
and backing out of the page.
• After a phone call ends there may be no audio
from the radio.
Phone
• When tapping the Phone app in the app tray, the
tray might disappear.
• When on a Teams call using Android Auto there
may not be a notification of an incoming call.
• When connected to Wired Android Auto the Phone
screen may not have the "Switch Phone" option.
• There may not be a connection failure message if
Bluetooth is turned off on the customers device
while the Wireless Android Auto connection is
being established.

Bulletin No.: 23-NA-118
•
•

August, 2023

During an OnStar emergency call if you turn TTY
off then back on and press the call timer the
screen may go black.
During an OnStar emergency call the keyboard
might show up if swiping on a notification.

IPC
• When switching from Google Maps to CarPlay the
cluster Navigation page may not indicate the
change.
• When there is an inbound call from an unknown
number, the call timer on the cluster may flicker.
OTA
• While checking for available over the air update, if
there is an error the back button may take you to
the wrong screen.
• During an Over the air update, if the customer
presses the reschedule button they may get a
black screen.
Translation
• Arabic formatting change for "Proper Use
Warning" message.
• Arabic formatting change for Teen Driver.
• Arabic translation issue for OnStar call timer.
• Arabic translation issue for road names and
remaining distance.
• Korean translation issue of "Files" in storage
screen.
• Norsk translation issue for "Device is starting"
message.
• Norsk translation issue for "Feature not available
while driving" message.
• Norsk translation issue for "Field cannot be blank"
message.
• Norsk translation issue for "Tap here to authorize
this feature" in the Auto-Unlock User Profile
screen.
• Norsk translation issue for Google voice typing.
• Norsk translation issue for WiFi password
changes.

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.

•

Page 3

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.
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 4

August, 2023

Bulletin No.: 23-NA-118

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-118

August, 2023

Page 5

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 Y168 or greater, this
bulletin does not apply.
• If the build number is less than Y168, 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.

Page 6

August, 2023

Bulletin No.: 23-NA-118

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-118

August, 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

*2889658

Update to Y168 Via USB/SPS

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.

Page 8

August, 2023

Bulletin No.: 23-NA-118

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 July 20, 2023
Revised August 04, 2023 – Added 2022–2023 Silverado 1500, Suburban, Tahoe, Sierra
1500, Yukon, and Yukon XL

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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