2025 CHEVROLET SILVERADO 3500

UNKNOWN OR OTHER

We were towing our 2025 Brinkley Z3100 Fifth Wheel and had a complete loss of trailer brakes with no warning or notification during a trip to and from the tennessee mountains from Florida. Had we not noticed the poor stopping ability it would have been an issue on any downhill grades as the trailer is in excess of 14,000 lbs. We stopped disconnected and reconnected the 7 pin connector and brakes were restored. This happened 4 times. We have made an appointment with the service department at Davis Chevrolet in Gainesville Florida however the service writer (Paul) has already indicated that he feels it is a trailer problem with the interaction of the trailer. Internet searches show this is a common problem with the GM Products and a Service Bullitin has been issued for years 2023-2024. Ours is a 2025 with the identical issues. I think there could be many many more of these out there and hope the issue can be resolved. I can reproduce the problem and it meets the full description of the Service bullitin 6379278.

SERVICE BRAKES

We were towing our 2025 Brinkley Z3100 Fifth Wheel and had a complete loss of trailer brakes with no warning or notification during a trip to and from the tennessee mountains from Florida. Had we not noticed the poor stopping ability it would have been an issue on any downhill grades as the trailer is in excess of 14,000 lbs. We stopped disconnected and reconnected the 7 pin connector and brakes were restored. This happened 4 times. We have made an appointment with the service department at Davis Chevrolet in Gainesville Florida however the service writer (Paul) has already indicated that he feels it is a trailer problem with the interaction of the trailer. Internet searches show this is a common problem with the GM Products and a Service Bullitin has been issued for years 2023-2024. Ours is a 2025 with the identical issues. I think there could be many many more of these out there and hope the issue can be resolved. I can reproduce the problem and it meets the full description of the Service bullitin 6379278.

POWER TRAIN

VALVE BODY FAILURE. TRUCK IS 6 MONTHS OLD. JUST HIT 37000 MILES. ENGINE BRAKE DISENGAGED, CHECK ENGINE LIGHT, TRAILERING OPTION DISABLED, AND WOULD NOT SHIFT OUT OF 1ST GEAR. TOWED TO DEALERSHIP TO BE TOLD VALVE BODY FAILED. REPLACEMENT PART HAS BEEN ORDERED AND NO ETA ON AVAILABILITY. GM MIGHT NEED TO BUY MY TRUCK BACK!

STRUCTURE:BODY

Roof flex under certain conditions Car wash loud banging and movement of Roof lining Loud bang at pavement or bridge approaches. Dealer has inspected and verified with same model. GM does not recognize problem and has no fix,vehicles with sunroof have know problem because of reinforcement of Roof

SERVICE BRAKES

The trailer brake controller randomly shuts down. We have gone through our trailer meticulously and have found zero issues. We have used this trailer with other trucks without any issues. This truck brake controller is shutting down leaving the driver with out brakes. We almost had a wreck due to this. GM keeps telling us that it is a trailer issue however the trailer works perfectly with any other truck. Someone is going to die in a wreck of this is not addressed immediately.