2024 Chevrolet Silverado 3500

The contact owns a 2024 Chevrolet Silverado 3500. The contact stated while driving at an undisclosed speed and towing a trailer, the trailer brake light turned off, indicating that the trailer brakes were no longer functioning. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the brake control module. The vehicle was repaired, but the failure reoccurred. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 500. The VIN was not available.

There is an electrical / turn signal and trailering issue. Not towing- the right turn signal gives a rapid flash when the automatic headlights are activated or in off position. The rapid flash goes away when manual headlights are used both running lights and on. Although the light still works with a rapid blink, there is a dash error message and it’s impossible to know while driving if the error is real or not. This issue is intermittent when auto headlights are selected. Towing- bigger safety issue. The trailer lights only work properly when headlights are in auto mode and daylight. When it gets dark, the headlights turn on and error messages happen and trailer lights go out. There are also error messages when manual running lights or manual lights are activated. Thus it appears there is no way to tow an RV safely at night. This did not occur on my 2021 Chevy 3500. These issues are wide spread but GM is doing nothing about it. Please help me, the other owners, and the public from these dangerous vehicles.

I have issues where I am connected to a new 42" 5th wheel and constantly get "Check Trailer Wiring" warnings as we drive down the road. I have been running with the lights on and they are on and fine, when the warning displays, but lose brakes to the trailer (both through pressing the brakes or controller and the trailer indicator light goes off). I cleaned the ground area and replaced the connector and still see issues. I checked continuity in the cable and good. I have been adding dielectric grease to the 7-pin connector. I saw a YouTube video where another gentleman, with a similar vehicle, had had the same issue and got a recall under GM Service Bulletin 6379278 for a trailer brake controller replacement. When I talked to GM/Chevy Consumer support, they advised that my truck was not under this bulletin and advised to call the NHTSA to get a case open or added to the service bulletin. I have a case open with GM #9-11303425686.

Recently purchased a 2024 Chevrolet Silverado Hd3500 and use it to haul a 40' 5th wheel toyhauler. Several instances when I connected the RV electrical cord to the truck I would see a "check trailer wiring" message. Along with this message I noticed there was no current going to the RV brakes. I had several technicians look into matter, but could not find a resolution. Later my brother sent me a YouTube related to this problem. It appears that if the RV has solar cells for power or the RV generator is running, the voltage on the RV battery is affecting the truck sensors and disables the brakes. This can be a life threatening issue for the vehicle driver or others on the highway.

We have a 2022 Grand Design Imagine 22MLE and when we tow it with the truck we are getting the intermittent message on the dash that the trailer brake wiring is not connected. It continually connects and disconnects as we tow and press the brakes on the truck. We previously towed the camper with a 2011 Silverado 1500 and did not have this happen. We took the truck back to the dealer for a service check and they had no answered for us. This is a serious safety concern while we are towing an extra 6,000 pounds behind us.

Trailer Brake controller DIC shows "check trailer wiring" and Brakes are not functioning. Intermittent issue but mostly no brakes. Lights all work fine. New RV bought in [XXX] testing brakes and DIC indicated issue. Stokes Chevy dealer replaced Brake controller and for 1st 1 1/2 hours on [XXX] no issue. Pulled over for lunch and when restarted truck the issue came back. no brakes or at best intermittent for 700 miles. numerous times pulled over and reconnected 7 pin. using GM recommended 7 pin on RV. Brakes and wires tested by RV dealer. Ford was used to haul trailer initially to RV park and no issues. Took truck to dealer once home ( Cavender GMC) they cannot find issue. Also the check parking brake icon comes on. Heard there is bulletin w/ issue involving solar chargers and batteries on RV being possible issue. RV is 2023 Grand Design 373FB-R. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2024 Chevrolet Silverado 3500. The contact stated while driving 30 MPH towing a trailer and depressing the brake pedal, the trailer failed to slow down as intended. The contact was able to continue driving to the destination. The vehicle was taken to the dealer and the contact was informed that an undisclosed electrical module needed to be added to the vehicle. The vehicle was not repaired. The manufacturer was contacted but no assistance was provided. The failure mileage was 2,800.