Bulletin No.: 24-NA-100

Service Bulletin

Date: July, 2024

TECHNICAL
Subject:

Radio Software Version Y172 – Multiple Updates for IOK
This Service Bulletin Covers Vehicles Formerly in PIT6107 and PIT6118.

Brand:

Model:

Model Year:
from

Chevrolet

Silverado 1500

2023

Silverado 2500HD/
3500HD

2024

Suburban

from

Engine:

Transmission:

to

2024

2022

Tahoe

GMC

to

VIN:

Sierra 1500

2023

Sierra 2500HD/
3500HD

2024

Yukon
Yukon XL

2022

2024

2024

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.

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.

Correction

A new radio software update, version Y172, 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.
Customers will receive a Software Update notification once the software has been downloaded to their vehicle and will need to accept the OTA when prompted.
Caution: to avoid potential programming errors, ensure both programming events (Programming and USB File Transfer) are performed.

Y172 Most Notable Improvements:

• No audio after phone call

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:

• No audio and audio app blank

Audio:
• Audio app may crash and change source on own
• Audio loss when changing drive mode

Copyright 2024 General Motors. All Rights Reserved.

• No audio and volume knob doesn't respond
• No audio on start
• No turn signals audio
• Start up audio delayed
• With an Android phone paired there is no audio

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July, 2024

Cluster:
• Album Art flashes on XM station change
• When the radio is off there may be a Power icon
showing on the audio page. "Audio Off" to let the
driver know the radio is off is missing
Connectivity:
• 4G connection is dropping
Display:
• Audio card crashes and will not recover
• Audio card may freeze
• Black Screen

Bulletin No.: 24-NA-100

• Customer can't open the CarPlay app through the
home screen icon
• During a call the audio may stay on the handset
instead of being heard through the vehicle
• Echo during phone call
• The CarPlay screen might flicker
Profiles:
• Correct password not working when changing from
driver profile to new profile
• No incorrect password pop-up when entering
incorrect password

• Black Screen after accepting TCPS

• Settings app and new profile do not respond after
switching to new profile

• Black screen when launching Trailering App

• Stuck on loading message on profile change

• Black screen when switching profile during a call
on a password lock screen

Programming:

• Blank screen after accepting TCPS

• Customer may see a message to "restart the
system to complete the update”

• Card view Clock app in wrong position on ignition
start

• Download stuck at 67%

• Card view disappears after changing profile

• Flash/Flicker when selecting x button or back
button on faceplate

• Card view is blank when profile creation interrupted

• The OTA update may fail

• Home screen glitching
• Loading message for Maps and audio cards

• The USB update may fail
Radio:

• Maps and Trailering might be missing from the
right-side apps view

• Keyboard will not come up after change language
button is pressed

• The display may look like a picture negative when
switched to day mode

• The favorites button on the steering wheel controls
may not work

• The Home screen may not have any app icons
HVAC:
• The blower speed turns down at startup by itself
Navigation:
• Google Maps blinking
• Icons incorrect
• Location changing randomly
• Maps blank in porch view

SXM:
• Customer sees "No Signal" message
• Customer sees "XM Loading" message
• XM audio pausing for a second when an icon is
pressed on any screen
Trailing App:
• Trailer app not launching from card view for first
time user

• Maps freezing in card view

• White screen displays after clicking done in
trailering-towing assist screen

• Navigation page will not load on cluster

• Your trailering profiles may not sync with the cloud

• Turn-By-Turn may not work
Phone:
• Android Auto screen is cut off and the touch
display does not work
• Answer button on the screen does not work

USB:
• USB data not functioning
Voice Recognition:
• Alexa not stopping on SWC end button press

• Apple Music skipping songs

• Google Assistant asks for device when
commanded to play music

• CarPlay will not connect or is slow to connect

• Google Assistant extra-long delayed response time

Bulletin No.: 24-NA-100

July, 2024

• No Voice Recognition functions
Stability:
• Card View takes a long time to load apps
• Radio doesn't turn on
• Radio Stays on for a minute after cancelling RAP
• Reboot
• System freezes
• When changing Trailer Maintenance data to 100%
the system may crash
• When exiting camera, the app tray and status bar
may disappear, and the transition is not smooth
Non-GMNA fixes:
• The radio may switch from DAB to FM after an
announcement.

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.

Page 3

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

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July, 2024

Bulletin No.: 24-NA-100

5743643

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

5877000

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July, 2024

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. Reprogram the Radio. Refer to A11 Radio:
Programming and Setup.

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July, 2024

Bulletin No.: 24-NA-100

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.

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

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

*2810335

Radio Reprogramming with SPS

Use Published Labor Operation Time

Important: *To avoid warranty transaction rejections, carefully read and follow the instructions below:

Bulletin No.: 24-NA-100

July, 2024

Labor Operation

Description

Page 7
Labor Time

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.

Warranty Claim Code Information Retrieval

6125774

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July, 2024

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.

Bulletin No.: 24-NA-100

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.

3. Select Settings (1).
Version

2

Modified

Released June 10, 2024
Revised July 25, 2024 - Added Chevrolet Suburban and Tahoe and GMC Yukon and
Yukon XL to Vehicle List.

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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