GENERAL MOTORS
DCS6959
URGENT - DISTRIBUTE IMMEDIATELY
Date:

August 1, 2024

Subject: REVISION: N232414840-01– Customer Satisfaction Program
Intermittent Loss of Trailer Brakes
Customer Reimbursement Added
Models: 2024 Chevrolet Silverado 2500HD/3500HD
2024 GMC Sierra 2500HD/3500HD
Equipped with BRK APL CTRL FEATURE-INTEGRATED TRAILER
BRAKE (RPO JL1)

This bulletin has been revised to add Customer Reimbursement. Please
discard all previous copies of bulletin N232414840.

END OF MESSAGE

Customer Satisfaction Program
N232414840 Intermittent Loss of Trailer Brakes
Release Date:
Revision Description:
Attention:

August 2024

Revision:

01

This bulletin has been revised to add Customer Reimbursement. Please discard all
previous copies of bulletin N232414840.

This program is in effect until August 31, 2026.

Make
Chevrolet
Chevrolet
GMC

Model
Silverado 2500HD/3500HD
Silverado 2500HD/3500HD
Sierra 2500HD/3500HD

Model Year
From
To
2020
2020
2024
2024
2024
2024

RPO

Description

JL1

BRK APL CTRL FEATUREINTEGRATED TRAILER BRAKE

Involved vehicles are marked “Open” on the Investigate Vehicle History screen in GM Global Warranty Management
system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections
and/or repairs.
Condition

Correction

On certain 2020 and 2024 model year Chevrolet Silverado 2500HD/3500HD and 2024 model year GMC
Sierra 2500HD/3500HD vehicles equipped with Integrated Trailer Brake (RPO JL1), if the trailer battery
is charged to a higher voltage than the vehicle battery, it may cause the voltage to feed back into the
vehicle battery and create a false short to ground. This false short to ground will trigger trailer braking to
be disabled with customer notification.
Dealers are to replace the Trailer Brake Power Module (TBPM).

Parts
Quantity
1

Part Name

Part No.
85073615

JL1, Trailer Brake Power Module

Reminder: Parts may be removed from SPRINT and Retail Inventory Management (RIM) and be non-returnable. Dealers
should review the affected parts to confirm RIM managed status. Parts may have quantity limiters in effect. Due to the
limited initial parts availability, dealers are encouraged not to order these parts for use as shelf stock.
Warranty Information
Labor
Operation
9106980
9107592

9107593

Description
Trailer Brake Control Module Replacement (Silverado HD/Sierra
HD)
Customer Reimbursement Approved
- For USA and Canada dealers only
- For Export dealers only
Customer Reimbursement Denied – For USA dealers only

Labor
Time
0.3

N/A
0.2
N/A

Trans.
Type
ZFAT

Net
Item
N/A

ZFAT

*

ZFAT

**

Note: To avoid having to “H” route the customer reimbursement transaction for wholesale approval, it must be submitted
prior to the repair transaction.
* For USA & Canada: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement. Submit $20.00 USD
($25.00 CAD) administrative allowance in Net/Admin Allowance.
For Export: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement.
** Submit $10.00 administrative allowance in Net/Admin Allowance.
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.
1.

Remove the Trailer Brake Power Module. Refer to Trailer Brake Control Module Replacement in SI.

2.

Install the NEW Trailer Brake Power Module. Refer to Trailer Brake Control Module Replacement in SI.

Copyright 2024 General Motors. All Rights Reserved.

Page 1 of 3

Customer Satisfaction Program
N232414840 Intermittent Loss of Trailer Brakes
Dealer Responsibility
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.
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.
Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle,
or ownership, through August 31, 2026. Customers who have recently purchased vehicles sold from your vehicle
inventory, and for which there is no customer information indicated on the involved vehicle listing, are to be contacted by
the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this
bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Program followup cards should not be used for this purpose, since the customer may not as yet have received the notification letter.
In summary, whenever a vehicle subject to this program enters your vehicle inventory or is in your facility for service
through August 31, 2026, you must take the steps necessary to be sure the program correction has been made before
selling or releasing the vehicle.
Dealer Reports – For USA & Export
For dealers with involved vehicles, a listing has been prepared and will be available through GM GlobalConnect Maxis
Field Action Reports or sent directly to export dealers. 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.
Courtesy Transportation – For USA & Canada
Courtesy transportation is available for customers whose vehicles are involved in a product program and still within the
warranty coverage period. See General Motors Service Policies and Procedures Manual for courtesy transportation
program details.
Customer Notification
USA & Canada - General Motors will notify customers of this program on their vehicle (see copy of customer letter included
with this bulletin).
Export - Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor
Vehicle Safety Act. For owners outside these areas, dealers should notify customers using the attached sample letter.
Customer Reimbursement
Customer requests for reimbursement of previously paid repairs to correct the condition described in this bulletin are to
be submitted to the dealer prior to or by August 31, 2025. See General Motors Service Policies and Procedures Manual
(USA & Canada) or local Policies and Procedures, for details.

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 2 of 3

Customer Satisfaction Program
N232414840 Intermittent Loss of Trailer Brakes
August 2024
This notice applies to your vehicle, VIN: ________________________________
Dear General Motors Customer:
We have learned that on your 2020 or 2024 model year Chevrolet Silverado 2500HD/3500HD or 2024 model year GMC
Sierra 2500HD/3500HD equipped with Integrated Trailer Brake, if the trailer battery is charged to a higher voltage than
the vehicle battery, it may cause the voltage to feed back into the vehicle battery and create a false short to ground.
This false short to ground will trigger trailer braking to be disabled. If the condition is alleviated, meaning the trailer
battery voltage falls below the vehicle battery voltage, trailer braking will be restored, even within the same ignition
cycle.
Your satisfaction with your Chevrolet Silverado 2500HD/3500HD or GMC Sierra 2500HD/3500HD is very important to
us, so we are announcing a program to prevent this condition or, if it has occurred, to fix it.
What We Will Do: Your GM dealer will replace the trailer brake power module. This service will be performed for you
at no charge until August 31, 2026. After that, any applicable warranty will apply.
What You Should Do: Until the repair is completed, please disable the trailer solar panels and/or generator. After
starting your vehicle, and before driving:
1)
2)
3)

Ensure that the Trailer Brake Symbol on the control panel is illuminated and that “Check Trailer Wiring” or
“Service Trailer Brake System” is NOT displayed.
If these messages appear and/or the Symbol isn’t illuminated, please wait until a “Trailer Brakes Connected”
message appears, and the Trailer Brake Symbol on the control panel illuminates.
This will need to be done whenever you start the vehicle with the trailer connected until the repair has been
performed.

To limit any possible inconvenience, we recommend that you contact your GM dealer as soon as possible to schedule
an appointment for this repair. By scheduling an appointment, your dealer can ensure that the necessary parts will be
available on your scheduled appointment date.
Even though you may have previously had repairs for this condition, you will still need to take your vehicle to your
dealer for additional repairs. If you have already paid for repairs for the condition described in this letter, and those
repairs were completed prior to this mailing, please complete the enclosed reimbursement form and present it to
your dealer with all required documents. Working with your dealer will expedite your request, however, if this is not
convenient, you may mail the completed reimbursement form and all required documents to Reimbursement
Department, PO Box 33170, Detroit, MI 48232-5170. The completed form and required documents must be presented
to your dealer or received by the Reimbursement Department by August 31, 2025, unless state law specifies a longer
reimbursement period.
If you have any questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer
Assistance Center at the number listed below.
For the hearing or speech impaired, please contact our Customer Assistance Center using the Telecommunication
Relay Service by dialing 711 then providing the appropriate Customer Assistance Center number for your vehicle.
Division
Chevrolet
GMC
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

Number
1-800-222-1020
1-800-462-8782
1-866-467-9700
1-866-467-9700
1-866-467-9700

We truly appreciate you taking the time to remedy your vehicle as we know your time is valuable. We want you to know
that we will do our best, throughout your ownership experience, to ensure that your GM vehicle provides you many
miles of enjoyable driving.
Neelie O’Connor
Global Executive Director
Customer Experience Operations
N232414840
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