23-NA-034 Service Bulletin/Repair Instructions

Bulletin No.:
Service Bulletin
Date:
23-NA-034

December, 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
to
—
-
—
Engine:
Transmission:
-
—
—
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)
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 has been released via an Over-the Air-Update, version

Y168. Refer to bulletin 23–NA-118 for the newest Radio software.
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.

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

• 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
Page 2
December, 2023
•

•

•

•
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
Bulletin No.: 23-NA-034
• 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

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
Version
5
Modified
Released March 08, 2023

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

Revised May 15, 2023 – Updated Correction Section.

Revised September 14, 2023 – Updated to change Correction, remove Service

Procedure and Warranty Information.

Revised December 20, 2023 - Removed Australia/New Zealand from Involved Regions or

Country Section.
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.
WE SUPPORT VOLUNTARY

TECHNICIAN

CERTIFICATION

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