Bulletin No.: 24-NA-176

Service Bulletin

Date: April, 2025

TECHNICAL
Subject:

Turn Signal Over Cancelling
This Bulletin Replaces PIT6190. Please Discard all Versions of PIT6190.

Brand:

Buick

Chevrolet

GMC

Model:

Model Year:

Breakpoint:

from

to

from

to

Enclave

2025

2025

SOP

May 31, 2025

Blazer EV

2024

2024
—

—

Equinox

2025

2025

Equinox EV

2024

2025

Colorado

2023

2024

Traverse

2025

2025

Terrain

2025

2025

Canyon

2023

2024

Acadia

2025

2025

Engine:

Transmissi
on:

—
—

SOP

May 31, 2025

—

—

SOP

May 31, 2025

2.5 LKO
—

Involved Region or Country

North America, Israel, GM Korea Company, Middle East

Condition

Some customers may comment on the turn signal over cancelling. When a customer
uses their turn signal in either direction, instead of self-cancelling it will switch to the
opposite direction for a few flashes.

Cause

The cause of the condition may be a software anomaly.

Correction

Reprogram the Body Control Module (BCM).

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.
Important: This technical service bulletin (TSB) can only be completed by certified repair facilities who have met all
specific training, tool and equipment requirements pertaining to the vehicle Brand and Model serviced. Repairs must
be performed by a technician who has successfully completed the required training.
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

Copyright 2025 General Motors. All Rights Reserved.

Page 2

April, 2025

Bulletin No.: 24-NA-176

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.
• 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.
• 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.: 24-NA-176

April, 2025

Page 3

5743643

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

5877000

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Bulletin No.: 24-NA-176

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 Body Control Module. Refer to K9 Body Control Module: Programming and Setup in SI.

Bulletin No.: 24-NA-176

April, 2025

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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 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

*2887938

Reprogram the BCM for Turn Signal Over Correcting

0.3 Hr.

*This is a unique Labor Operation for Bulletin use only.
Important: **To avoid warranty transaction rejections, carefully read and follow the instructions below:

Page 6

April, 2025

Labor Operation

Bulletin No.: 24-NA-176
Description

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

Bulletin No.: 24-NA-176

April, 2025

Page 7

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

6

Modified

Released August 29, 2024
Revised September 24, 2024 – Added the 2024 Chevrolet Blazer EV and EV important
statement under Service Procedure.
Revised February 13, 2025 - Added the 2024 Chevrolet Equinox EV.
Revised February 26, 2025 - Added the 2025 Chevrolet Equinox EV.
Revised March 14, 2025– Added the 2025 Terrain and Equinox.
Revised April 17, 2025– Added MY 2025 Acadia, Enclave, Traverse with breakpoint.

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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