GM customer satisfaction program N232414840, revision 02, dated August 2024, covers certain 2024 GMC Sierra 2500HD and 3500HD trucks equipped with integrated trailer brake RPO JL1. It also names certain 2024 Chevrolet Silverado 2500HD and 3500HD trucks. The program says that if the trailer battery is charged to a higher voltage than the vehicle battery, that voltage can feed back and create a false short to ground, and trailer braking is disabled with a notification. If the trailer battery voltage then falls below the vehicle battery voltage, trailer braking can return in the same ignition cycle. Dealers replace the trailer brake power module. The program runs until August 31, 2026, and the bulletin says to confirm the VIN shows Open before the work starts. NHTSA complaint ODI 11690268, on a 2024 Sierra 3500, says the truck has the brake-controller failures in bulletin N232414840, that the trailer brakes drop out, and that the message clears after the truck is restarted. The owner wrote that the trailer wiring checked out and that the same trailer worked with other tow vehicles. Complaint ODI 11609889 says the truck disengages the fifth-wheel trailer brakes and the dash says trailer brakes disabled, service required. Complaint ODI 11766195 says the integrated trailer brake control goes in and out while towing a boat trailer and a travel trailer, and that a dealer changed the rear plug without ending it. Complaint ODI 11672342 says that while towing a Forest River Riverstone Legacy fifth wheel at about 60 mph, the dash showed service trailer brake and the pedal had to go to the floor to stop. These complaints do not show the module failing on every 2024 Sierra 3500.

The bulletin says a trailer battery at a higher voltage than the truck battery can feed back and set a false short to ground, which disables trailer braking. Complaint ODI 11690268 names that bulletin. The other complaints describe the brakes dropping out and do not say the trailer battery voltage was measured. The bulletin does not say every towing complaint on this model year is this program.

If the dash says the trailer brakes are disabled, do not keep towing as if the trailer brakes are working. Pull off when you can. The bulletin tells a dealer to replace the trailer brake power module on a VIN that shows Open, at no charge while the program is in effect. Revision 02 lists 0.6 hour under labor operation 9106980. Ask the dealer to look up N232414840 for the VIN before the next trip. Complaint ODI 11690268 says restarting the truck brought the brakes back for a while. That restart is the owner's account, not the repair in the bulletin. Sourced public report. This is not a repair procedure from RigFix.

Seeing the dash message is what these owners describe. Replacing the module, in the bulletin, is dealer work. There is no driveway procedure here.

The bulletin names trailer brake power module part 85073615, one per truck. It says parts may be limited and tells dealers not to stock them on the shelf.

This is not a recall. N232414840 is a customer satisfaction program. The bulletin says the module replacement is no charge until August 31, 2026, and that any applicable warranty applies after that. A complaint is not a coverage decision for another Sierra 3500. The year on this page is 2024, which is the year the bulletin and these complaints name. The same bulletin names the 2024 Silverado 3500, which has its own page, and the 2024 Sierra 2500. The valve-body report on this model is a different page.

Last updated October 15, 2026

2024 GMC Sierra 3500

2024 Sierra 3500 trailer brakes drop out when the trailer battery runs higher

Owner reportElectrical

Symptoms: GM customer satisfaction program N232414840, revision 02, dated August 2024, covers certain 2024 GMC Sierra 2500HD and 3500HD trucks equipped with integrated trailer brake RPO JL1. It also names certain 2024 Chevrolet Silverado 2500HD and 3500HD trucks. The program says that if the trailer battery is charged to a higher voltage than the vehicle battery, that voltage can feed back and create a false short to ground, and trailer braking is disabled with a notification. If the trailer battery voltage then falls below the vehicle battery voltage, trailer braking can return in the same ignition cycle. Dealers replace the trailer brake power module. The program runs until August 31, 2026, and the bulletin says to confirm the VIN shows Open before the work starts. NHTSA complaint ODI 11690268, on a 2024 Sierra 3500, says the truck has the brake-controller failures in bulletin N232414840, that the trailer brakes drop out, and that the message clears after the truck is restarted. The owner wrote that the trailer wiring checked out and that the same trailer worked with other tow vehicles. Complaint ODI 11609889 says the truck disengages the fifth-wheel trailer brakes and the dash says trailer brakes disabled, service required. Complaint ODI 11766195 says the integrated trailer brake control goes in and out while towing a boat trailer and a travel trailer, and that a dealer changed the rear plug without ending it. Complaint ODI 11672342 says that while towing a Forest River Riverstone Legacy fifth wheel at about 60 mph, the dash showed service trailer brake and the pedal had to go to the floor to stop. These complaints do not show the module failing on every 2024 Sierra 3500.
Likely causes: The bulletin says a trailer battery at a higher voltage than the truck battery can feed back and set a false short to ground, which disables trailer braking. Complaint ODI 11690268 names that bulletin. The other complaints describe the brakes dropping out and do not say the trailer battery voltage was measured. The bulletin does not say every towing complaint on this model year is this program.
Common fixes: If the dash says the trailer brakes are disabled, do not keep towing as if the trailer brakes are working. Pull off when you can. The bulletin tells a dealer to replace the trailer brake power module on a VIN that shows Open, at no charge while the program is in effect. Revision 02 lists 0.6 hour under labor operation 9106980. Ask the dealer to look up N232414840 for the VIN before the next trip. Complaint ODI 11690268 says restarting the truck brought the brakes back for a while. That restart is the owner's account, not the repair in the bulletin.
DIY difficulty: Seeing the dash message is what these owners describe. Replacing the module, in the bulletin, is dealer work. There is no driveway procedure here.
Parts needed: The bulletin names trailer brake power module part 85073615, one per truck. It says parts may be limited and tells dealers not to stock them on the shelf.
Warranty notes: This is not a recall. N232414840 is a customer satisfaction program. The bulletin says the module replacement is no charge until August 31, 2026, and that any applicable warranty applies after that. A complaint is not a coverage decision for another Sierra 3500. The year on this page is 2024, which is the year the bulletin and these complaints name. The same bulletin names the 2024 Silverado 3500, which has its own page, and the 2024 Sierra 2500. The valve-body report on this model is a different page.

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2024 Sierra 3500 trailer brakes drop out when the trailer battery runs higher

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