N252521591-02 Service Campaign

GENERAL MOTORS

DCS7428

URGENT - DISTRIBUTE IMMEDIATELY

Date:
February 10, 2026
Subject: REVISION: N252521591-02 – Service Update

Unwanted Integrated Brake Assist

Revised Warranty Table, Service Procedure, Additional Vehicles

Added

Models: 2026 Cadillac Escalade ESV

2026 Cadillac Escalade

2026 Cadillac ESCALADE IQ

2026 Cadillac ESCALADE IQL

2026 Cadillac CT5

2026 Cadillac VISTIQ

2026 Chevrolet Equinox EV

2026 Chevrolet Suburban

2026 Chevrolet Tahoe

2026 Chevrolet Silverado EV

2026 GMC Sierra EV

2026 GMC Yukon

2026 GMC Yukon XL
This bulletin is being revised to update the warranty table, service procedure and

add additional vehicles. Please discard all previous copies of bulletin

N252521591.

For dealers with involved vehicles, a listing has been prepared and will be

available through GM Global Connect Maxis Field Action Reports or GWM Field

Action Batch Search Report. The Inventory tab of the dealer reports will contain

VINs that apply to this field action. This information is intended to assist dealers

with the PROMPT COMPLETION of these vehicles. The Customer In-Service

tab will contain customer names and addresses from Motor Vehicle Registration

Records. The use of such motor vehicle registration data for any purpose other

than follow-up necessary to complete this field action may be a violation of law in

several states.
END OF MESSAGE
Service Update

N252521591 Unwanted Integrated Brake Assist

Release Date:

Revision Description:

Attention:
February 2026
Revision:
02
This bulletin is being revised to update the warranty table, service procedure and add

additional vehicles. Please discard all previous copies of bulletin N252521591.
This service update includes vehicles in dealer inventory and customer vehicles that return to the

dealership for any reason. This bulletin will expire November 30, 2027.

For EV Involved Vehicles: The repairs outlined in this bulletin must only be completed at an authorized

EV dealer and repairs must be performed by a technician who has successfully completed the

applicable technical training required to perform this repair.

Investigate Vehicle History (IVH) in the GM Global Warranty Management system MUST always

be checked to confirm vehicle involvement and MUST be in OPEN status prior to beginning any

required inspections and/or repairs. DO NOT use Service Information with VIN search, as it will

not verify the VIN eligibility for field actions.

This is a phased launch.

Model Year
Make

Cadillac

Cadillac

Cadillac

Cadillac

Cadillac

Cadillac

Chevrolet

Chevrolet

Chevrolet

Chevrolet

GMC

GMC

GMC
Model

Escalade ESV

Escalade

Escalade IQ

Escalade IQL

CT5

VISTIQ

Equinox EV

Suburban

Tahoe

Silverado EV

Sierra EV

Yukon

Yukon XL
From
To
2026
2026
Investigate Vehicle History (IVH) in the GM Global Warranty Management system MUST always be checked to confirm

vehicle involvement and MUST be in OPEN status prior to beginning any required inspections and/or repairs. DO NOT

use Service Information with VIN search, as it will not verify the VIN eligibility for field actions.

Condition

Correction
Certain vehicles listed above may have a condition in which hard braking may unexpectedly engage.

Dealers will reprogram the Image Processing Module.
Parts

No parts are required for this repair.

Warranty Information

Labor

Operation

9107839*

9108068*

9108085*

Important:
Description

Verified Module Software or Calibration Level: Module Is

Programmed with Same Level Software or Calibration

Image Processing Module Reprogramming with SPS (For RPO’s
Labor

Time
Trans.

Type
Net

Item
ZFAT
N/A
0.2

1.0
WITH UKL/UK0 ONLY)

Front View Camera Reprogramming with SPS (For
RPO’s WITH
0.3
UGN/UHY and WITHOUT UKL/UK0)

* To avoid warranty transaction rejections, carefully read and follow the instructions below:
Page 1 of 5
Service Update

N252521591 Unwanted Integrated Brake Assist
6125814
• The Warranty Claim Code from the programming event 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
If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as

follows:

1.

2.

3.

4.
Open TLC on the computer used to program the vehicle.

Select and start SPS2.

Select Settings (1).

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.

Service Procedure

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.

Note: Carefully read and follow the instructions below.
Page 2 of 5
Service Update

N252521591 Unwanted Integrated Brake Assist

•
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.
•
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.
Caution: Be sure the VIN selected in the drop down menu (1) is the same as the vehicle connected (2) before beginning

programming.
5743643
Important: If the vehicle VIN DOES NOT match, the message below will be shown.
5877000
Page 3 of 5
Service Update

N252521591 Unwanted Integrated Brake Assist
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.
For RPO’s WITH UKL/UK0 ONLY

1.
Reprogram the Image Processing Module. Refer to K124 Image Processing Module: Programming and Setup in SI.

For RPO’s WITH UGN/UHY and WITHOUT UKL/UK0
2.
Reprogram the Front View Camera. Refer to B174W Front View Camera - Windshield: Programming and Setup in

SI.
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.

3.
Record SPS Warranty Claim Code on job card for warranty transaction submission.
Dealer Responsibility

Whenever a vehicle subject to this service update enters your vehicle inventory or is in your facility for service through

the end date as noted in the Attention box, you must take the steps necessary to be sure the service update correction

has been made before selling or releasing the vehicle.

All new, used, GM Certified Pre-Owned (CPO), courtesy transportation vehicles, dealer shuttle vehicles, CarBravo, etc.

in dealers' possession and subject to this field action must be held and inspected/repaired per the service procedure of

this bulletin before customers take possession of these vehicles. Involved vehicles must be held and not delivered to

customers, dealer-traded, released to auction, used for demonstration, or any other purpose.

Page 4 of 5
Service Update

N252521591 Unwanted Integrated Brake Assist

All GM Certified Pre-Owned (CPO) vehicles currently in the dealers’ inventory within the SHIFT Digital system will be

de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting an accepted/paid

warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified for sale within

the SHIFT Digital system, or once again be used in the Courtesy Transportation Program.

Dealer Reports – For USA and Export

The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.

This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not

inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the

customer is in for a regularly scheduled visit.
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 tools, equipment, 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 dealer for information on whether your

vehicle may benefit from the information.
We Support

Voluntary Technician

Certification
Page 5 of 5

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Last update on 2026-03-23 / Affiliate links / Images from Amazon Product Advertising API

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