Bulletin No.:

Service Bulletin

Date:

23-NA-118
December, 2023

TECHNICAL
Subject:

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

Brand:

Model:

from

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

Model Year:

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

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

VIN:
from

Engine:

Transmission:

to

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

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 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 Y169, was released to service for vehicles
equipped with Infotainment system RPO IOK being brought into the service department.
Refer to bulletin 23-NA-143 for version Y169.
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.

Copyright 2023 General Motors LLC. All Rights Reserved.

Page 2

December, 2023

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.
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.

•

Bulletin No.: 23-NA-118

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.
• 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.

Bulletin No.: 23-NA-118

December, 2023

Page 3

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.
Version

4

Modified

Released July 20, 2023
Revised August 04, 2023 – Added 2022–2023 Silverado 1500, Suburban, Tahoe, Sierra
1500, Yukon, and Yukon XL
Revised September 25, 2023 – Added bulletin referral to Correction Section, Removed
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.

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