2025 Chevrolet Silverado 2500 problems

“- Multiple system failure. Truck presented with oil or ATF leaking from the transmission bell housing and transmission inspection port cover. First detected by me at 30k mile oil change. Prior to this, my wife and I both complained that the truck was very slow to get into gear from a stop, especially while towing. Engine would rev and then finally dump power, spinning the rear tires. Additionally encountered hunting for gears on the highway. - Second failure. 24 AUG. Truck illuminated with Check engine light, Traction control light, forward collision light, service ECS, service trailer brake control, and ABS light. - Inconsistent power application and loss of safety features makes the truck unpredictable and unsafe to drive. - Truck is at the second dealer (first diagnosed issues as an oil drain plug). Has been at dealers for 32 days now. Problem is confirmed. - The suspected transmission issues have been noticed intermittently and getting progressively worse for about 6 months. Warning lights all appeared on the morning of 24 AUG. Truck was taken directly to the shop that morning.”

“Radio does not emit sound also canceling all warning noises for fuel level, turn signals, seat belts, open door in motion. This problem is not only a saftey hazard for drivers its a major annoyance. Honestly find it quite distracting. Have reached out to gm multiple times and the issue hasn't been corrected. Really concerned this is going to plage my vehicle its whole life. This issue has happened more times than I can count.”

“While driving at a speed of around 40 mph on a paved city street in Bozeman, MT, I heard and felt a Super loud clunk in my Chevy engine transmission or drive train.. I immediately stopped to see if something ran into the vehicle. No apparent visual damage of any kind. It felt and sounded like like something jammed within the transmission or drive train. The truck has less than 12k miles and has been babied so far. I love the truck. Oil level is normal and nothing leaking underneath..I took it immediately to Billion GMC in Bozeman. They found nothing wrong however the service manager recounted this regarding another customer who described the exact same issue with the same year vehicle and same transmission: Another GMC owner experienced the same symptom before the transmission seized at highway speed and locked the wheels. Because this presents a potential loss-of-control hazard, I am requesting that Chevrolet open a Technical Assistance Center case, document all diagnostic findings in writing, and determine whether the vehicle is safe to operate before returning it to me. The service manager who recounted this event is named Jay.”

“The contact owns a 2025 Chevrolet Silverado 2500. The vehicle was previously taken to the dealer after the messages "Trailer Brake Disabled, Service Required" and "Hill Activated" were displayed, and the vehicle was pulling to the left while driving 45 MPH. The dealer performed a tire rotation and an oil change; however, the failure persisted with the vehicle pulling to the left side. The vehicle was returned to the dealer, who determined that no alignment was needed. The failure recurred, and the vehicle was taken back to the dealer a third time. The dealer informed the contact that the manufacturer was aware of the failure in 2021 - present Silverado; however, no repair was available at that time. The manufacturer was notified of the failure by phone and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 21,000.”

“Tailgate just comes open itself”

“Safety Issue. The raised cruise control speed set button on the steering wheel is prone to being touched when rotating the steering wheel while making sharp turns when driving through parking lots at low speed. If the distance cruise was previously set at say 45 mph the last time it was used, and the set button is very briefly hit upward when rotating the wheel through your hands to the left, it can inadvertently cause the truck to start accelerating to that previously-set speed. The cruise button needs to be programmed such that at certain steering angles it will not respond to inputs. This is very dangerous. I ave had this happen to me at least 5 times. Hitting the brakes stopped the acceleration. I reported it to the dealer as a potential engine surge but they could not reproduce it. I just recently realized what was happening. I believe this can easily be addressed by a steering angle lockout of the button. Other issues: Drivetrain vibrates occasionally and shifts very hard (drivetrain literally slams through gear change) when leaving driving from a stop a slow speeds. Dealer cannot replicate. This diesel truck gets very poor mileage possibly from spending…”