Bulletin No.:

Service Bulletin

Date:

23-NA-183
November, 2023

TECHNICAL
Subject:

Radio Software Version Y171 – Multiple Updates

This Service Bulletin replaces PIT5999 and PIT6032. Please discard all copies of PIT5999 and
PIT6032.

Brand:

Chevrolet

Model:

from

to

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

2022

2022

Silverado 1500

2023

2024

Silverado 2500HD/
3500HD

2024

2024

2022

2023

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

2022

2022

Sierra 1500

2023

2024

Sierra 2500HD/
3500HD

2024

2024

Yukon
Yukon XL

2022

2023

Suburban
Tahoe

GMC

Model Year:

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 Radio 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 Y171, 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.

Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

November, 2023

Y171 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:
• Customer may have intermittent drops in audio.
• When starting the vehicle, the blower motor speed
may drop unexpectedly.
• A customer may not be able to save Favorites or
keep a phone paired to the vehicle because it is in
the Guest profile with no way to get to the Driver
profile.
• CarPlay might play through the phone instead of
the vehicle.
• There may be no radio audio after a phone
call ends.
• The customer might have no radio audio.
• Text message playback might play through the
phone instead of the vehicle.
• In the trailering app the brake gain does not save.
• The customer might have a black screen when
using Hulu.
• The HUD might show audio metadata for too short
of a time, or not at all, when changing stations.
• Google play security patches.

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.

•

Bulletin No.: 23-NA-183

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.

Bulletin No.: 23-NA-183

November, 2023

Page 3

5743643

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

5877000

Page 4

November, 2023

Bulletin No.: 23-NA-183

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 in the Service Manual.

Bulletin No.: 23-NA-183

November, 2023

Page 5

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.

Page 6

November, 2023

Bulletin No.: 23-NA-183

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

*2889888

Update Radio to Y171 via SPS/USB

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.

Bulletin No.: 23-NA-183

November, 2023

Page 7

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 November 03, 2023
Revised November 14, 2023 – Added 2023 SUV Model Year, 2024 1500, 2500HD, and
3500HD Truck Model Year.

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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