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:

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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.

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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

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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.
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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

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