21-NA-166

Bulletin No.:
Service Bulletin
Date:
21-NA-166
September, 2023
INFORMATION
Subject:
Turn Signal Stalks are Not Cancelling and/or Mis Cancelling
Model Year:
Brand:
Model:
Cadillac
Escalade Models
2021
Chevrolet
GMC
from
Silverado 1500
2020
Silverado 1500 New
(RPO J22, 12th VIN
Digit = 5 or greater)
2022
Silverado
2500HD/3500HD
2020
Suburban
2021
Tahoe
2021
Sierra 1500
2020
Sierra 1500 New
(RPO J22, 12th VIN
Digit = 5 or greater)
2022
Sierra
2500HD/3500HD
2020
Yukon Models
2021
VIN:
to
from
to
2024
-
-
Engine:
Transmission:
-
-
Involved Region or Country
North America, Russia, Middle East, Israel, Chile, Columbia, Ecuador, Paraguay,
Uruguay, Japan, S. Korea, Thailand, Australia, and New Zealand.
Condition
Some customers may comment on the turn signal stalk not cancelling and/or mis
cancelling.
Cause
This condition may be caused by a quality issue during assembly.
Correction
Remove and re-install the turn signal switch.
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
September, 2023
Bulletin No.: 21-NA-166
Service Procedure
Refer to Turn Signal Switch Replacement in SI.
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
7486068*
Remove and Re-Install Turn Signal Switch
0.2 hrs.
*This is a unique Labor Operation for Bulletin use only.
Version
3
Modified
Released July 20, 2021
Revised April 11, Revised to add 2022 Model Year.
Revised September 05, 2023 - Added 2023 and 2024 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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