2024 CHEVROLET SILVERADO 2500 Complaints

I kept getting “check trailer wiring” messages followed by a “trailer disconnected” message while towing a trailer and the trailer brakes would not engage. The trailer would “reconnect” and then “disconnect” constantly while driving. I lost my trailer brakes while trying to brake down a hill. Not having working trailer brakes is extremely dangerous.

If our trailer is plugged into the truck the warning "check trailer wiring" pops up. The warning ("check trailer wiring") would display and then the message "trailer connected" would generally happen. The trailer breaks disconnect during this time making it extremally dangerous for us and anyone else on the road if we need to stop quickly. This is not an issue with our new trailer as we pulled it with a 2017 Silverado with no issues.

The contact owns a 2024 Chevrolet Silverado 2500. The contact stated while driving at various speeds, the message "Check Trailer Wiring - Trailer brakes Disconnected" was displayed on the instrument panel. The contact stated that the failure caused the trailer brakes to fail to engage as needed. The vehicle had been taken to the dealer and it was confirmed to be a known failure however, the cause of the failure was not found. The vehicle had not been diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 1,000.

New Silverado 2500 HD LT and new Keystone Cougar 30BHS. My new truck is experiencing random trailer break controller disconnection while towing. This happened yesterday on the first trip bringing it home from the RV Dealership to my house. The trip was 68 miles total. It happened often and without a pattern. It appears that many others are experiencing the same issue. See youtube link below: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

This truck was optioned with the trailer tow package which includes a trailer brake controller. However, if the battery on the trailer is a higher voltage than the truck battery, the trailer brake controller will fail intermittently. This leaves the truck traveling at freeway speeds with no trailer brakes. This is EXTREMELY UNSAFE. GM is aware of the problem and has issued a technical bulleting "23-NA-113 Information on Trailer Brake Disabled or DTC Stored" on June 28, 2023. This is an EXTREMELY hazardous situation and should be resolved immediatlly or the truck owners should be advised to NOT TOW with the trucks until resolved.

Truck will not stay connected to our trailer brakes. We have a 2023 Grand Design Reflexion 270BN. The truck stays connected about 30% of the time. 70% of the time we get the following warnings “Check trailer wiring” or “service trailer brakes” and the trailer brakes are disconnected. Grand design has said this is 100% on the truck side. GM needs to find an update for this dangerous problem. We almost got into two crashes on a 2000 mile trip. Multiple people are in the same situation as us.

Pulling my 5th wheel camper and the trailer braking system goes in and out. It says, "check trailer brake wiring" and "service trailer brake". I have pulled same camper with a 2020 Chevrolet and didn't experience any issues. I have found some forums discussing that it's a GM problem with a service bulletin from GM #6379278 stating GM is working on the issue. This is a very concerning issue especially when towing over 10,000 lbs.

TRAILER BRAKES DISABLED INTERMITTENTLY. PROBLEM IS NOT WITH TRAILER IT IS THE TRUCK. TOOK IT TO DEALER THEY COULD NOT REPAIR SAID THAT General Motors IS WORKING ON A CORRECTION. THIS IS DANGEROUS IF TRAILER BRAKES ARE NOT ENGAGED IT WILL PUSH THE TRUCK.

While pulling fifth wheel camper the the electronic brake controller looses connection and brakes on the trailer do not work leaving only the truck brakes to stop both truck and trailer. General Motors claims this is caused due to the solar panel on the trailer charging the trailer battery more than the truck battery which back feeds into the system. This problem only occurred on the 2024 models. The same trailer was pulled with a 2021 model with no issues. This is a known problem which Chevrolet has a service bulletin stating such. Reference document # 6379278. At this time there has not been a fix. This is a safety hazard because there is no warning as to when the trailer brakes will stop working.

When my fifth wheel trailer is attached via the seven pin plug, the truck intermittently fails to recognize the trailer and I get a warning "check trailer wiring." When I get that warning, the integrated trailer brake controller fails to activate the trailer brakes. After a while I get the message "trailer brakes connected" and then the trailer brake controller activates the trailer brakes. This problem does not occur when the trailer is attached to a different truck. Apparently this is a well-known problem that GM has failed to correct or inform customers about. Please see the comments at [XXX] . This is a serious safety hazard as my trailer brakes have failed to activate while descending some very steep grades in the mountains. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)