2024 Chevrolet Silverado 2500

I crossed over the west bound lanes and turned left in the east bound lanes and under slight acceleration when my truck started jerking as if i was braking/accelerating back and forth. My diesel engine then went into limp mode and my transmission was stuck in a low gear and would not shift. I could only drive approximately 20 mph at 3000rpm. The people coming up behind me had to slow down because i couldn't pull over.

This vehicle has a severe transmission shift issue that will likely cause an accident at some point. This vehicle has an Allison 10 speed transmission and began shifting extremely hard or violently from 7th to 8th gear in November of 2023. This problem began when pulling a travel trailer that is weight rated well below the capacity of this truck. This hard shift causes vehicle occupants to lunge during the event and it is feared that a catastrophic failure will occur, resulting in a vehicle accident. The vehicle was taken to the dealership where purchased as it is still under manufacturer’s warranty, and in March of 2024 the dealership performed a software update and transmission “re-learn” which solved the issue until the truck was used to pull a travel trailer again. The issue returned in November of 2024. The truck was returned to the dealership for follow up but the dealership has not taken any further action to resolve the problem at this time. There is a service bulletin (N242467600) issued from GM that seems related to this vehicle but I’ve received no notification that this vehicle is eligible for transmission replacement under this service bulletin. This issue will likely result in a personal injury or vehicle accident at some point.

The contact owns a 2024 Chevrolet Silverado 2500. The contact stated that while driving at an undisclosed speed, the vehicle briefly jerked and then jolted. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to a dealer, who was unable to duplicate the failure; however, the contact was informed that the power train control module was reset. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline to report the failure. The failure mileage was 50.

Transmission failure on interstate i90, truck down shifted violently and check engine light came on and warning on dash read speed reduced drive with caution. Took truck to gm dealer on August 1 2024 who said the transmission shift solenoid plate has to be replaced. Gm dealer still has my truck as of October 16 2024 and all I they can tell me is that the part is on back order and they have no idea when it will be available. This could have caused a serious accident as I was also towing a 3500 lb trailer at 65mpg at the time with the speed being reduced so quickly by the failure.