general problems of the 2024 GMC Sierra 1500

My 2024 GMC sierra denali ultimate 1500 experienced a catastrophic powertrain failure that created a serious safety hazard. On xxx, while driving at highway speeds, the truck unexpectedly shifted into neutral, causing an immediate loss of propulsion. During this event, the electrical system was also affected. The battery power dropped, power steering assistance was lost, and due to the electronic push-button start system, the vehicle could not be restarted while in this condition. This placed me and surrounding motorists at significant risk of a crash. I initially brought the vehicle to point GMC, where I was advised no issue was found. After the problem continued, I returned on xxx and a dealership technician rode with me. During the test drive on [xxx], the truck again shifted into neutral, confirming the defect. The vehicle was then towed to the dealership, where diagnostics revealed dtc p0016. I was informed the engine had seized and required a complete engine replacement. The engine was replaced by an authorized GMC dealership in new jersey. After only about 2,000 miles, the check engine light returned and the vehicle began experiencing additional electrical issues. This is a denali ultimate, the highest trim level, with advanced electronic systems, making these recurring failures especially concerning. To date, the vehicle has been inspected by three authorized GMC dealerships, and I have opened multiple cases with GMC corporate. Despite repeated repair attempts, the manufacturer has not provided a permanent resolution. I continue to experience recurring engine and electrical issues and no longer have confidence in the safety or reliability of this vehicle. Given the repeated failures, loss of propulsion, loss of steering assistance, inability to restart the vehicle, and lack of resolution after multiple dealership visits and an engine replacement, I believe this matter warrants investigation by NHTSA. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The contact owns a 2024 GMC Sierra 1500. The contact stated that while idling in the driveway, the steering wheel became inoperable. Additionally, the contact stated that after parking the vehicle, the vehicle failed to start. There was no warning light illuminated. The vehicle was towed to the local dealer, where it was diagnosed that the power steering control module(pscm) needed to be replaced and reprogrammed. The vehicle was repaired, but the failure recurred while driving away from the dealer. The contact stated that the steering assist warning light was illuminated, and the message "stop driving" was displayed. The vehicle was taken back to the same dealer, where it was determined that the steering rack and pinion needed to be replaced; however, the parts were on backorder. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 5,754.

I bought this new vehicle from diamond Chevrolet in auburn, MA, in November 2024. The truck currently has approximately 10,000 miles on it. On two separate and distinct instances, the truck suffered a complete loss of power steering while driving on the highway. In both instances, the issue persisted until I turned the vehicle off. Numerous warning indicators were illuminated on the dashboard (service power steering, drive with care, service esc, etc). A loss of power steering is a significant safety defect, and it was hard to steer the truck at lower speeds. The dealership and general motors were able to replicate the issue and replace the entire power steering rack during the first instance of power steering loss. Currently, the vehicle is still being diagnosed by the dealership and general motors for the current yet similar issue. The issue is intermittent but poses a significant public safety risk to the consumer and general motoring public.

The contact owns a 2024 GMC Sierra 1500. The contact stated while driving 45 mph, the low fuel warning light, the forward collision avoidance warning light, the check engine warning light and other unknown warning lights were illuminated. The message "steering assist reduced" was displayed. The contact stated that the vehicle lost motive power. The contact was able to pull to the side of the road. The vehicle failed to restart and was towed to the dealer to be diagnosed, but the dealer could not determine the cause of the failure. The contact stated that the failure recurred while driving. The vehicle was towed to the dealer, where it was being diagnosed. The vehicle was not diagnosed or repaired. The contact related the failure to NHTSA action number: pe25001(engine, engine and engine cooling) and NHTSA campaign number: 25v274000(engine and engine cooling). The manufacturer was notified of the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 20,000.

The contact owns a 2024 GMC sierra. The contact stated while the driving at an unknown speed, the instrument panel went dark as steering wheel became difficult to maneuver. The contact stated that he immediately drive to the dealer where several diagnostic codes were found such as power steering failure and the instrument panel needed to be replaced.   the vehicle was repaired for the failure codes, power steering and instrument panel however the failure reoccurred. The vehicle was taken back to the dealer where the same repairs were completed however, the failure continued to occur. The manufacturer was notified of the failure and a case was opened. The approximate failure mileage was 10,200.