Power Train owner reports: GMC Sierra 1500 years in the records

The records describe a problem worth checking before purchase.

“Truck was placed in Park on an inclined road. Exiting truck, truck started to roll backwards. I was struck and right foot was run over by Driver's side front tire and knocked down. I was wearing composite toe shoes which enabled me to get up and run after the truck, trying to stop and control the truck a second time. I was hit again and thrown off the side of the road into a briar patch. Truck continued to roll backwards and off the road into the woods. Upon investigation, two separate County Deputy Sheriffs confirmed that the truck. when it came to rest, confirmed the truck was still in the Park position. Truck had to be towed out of a ditch in the woods. I sustained moderate injuries, but thankfully was not catastrophically disabled. This should be investigated thoroughly, so that no other person(s) is injured or dies as a result of this defect.”

The records describe a problem worth checking before purchase.

“The contact owns a 2022 GMC Sierra 1500. The contact stated that while merging onto the interstate at approximately 65 MPH, the rear wheels unexpectedly locked up without warning. The contact stated that the rear wheels remained locked for approximately half a second, causing a sudden reduction in speed and requiring the contact to pull over to the shoulder of the road. The vehicle was driven to a relative's residence and was then towed to a dealer. The dealer had not diagnosed the failure, and no repairs had been performed. The manufacturer was notified of the failure, and the contact was advised that there would be a follow-up. The failure mileage was approximately 32,000.”

The records describe a problem worth checking before purchase.

“The contact owns a 2022 GMC Sierra 1500 Denali. The contact stated that the VIN was not included in NHTSA Campaign Number: 24V797000 (Power Train). While the contact’s husband was driving 55 MPH, the vehicle stalled, the rear wheels locked up, and the vehicle decelerated until coming to a full stop. The engine warning light was illuminated. The contact stated that the vehicle was towed to dealer and was diagnosed with transmission control valve failure. The vehicle was not repaired. The contact associated the failure with the recall. The manufacturer was made aware of the failure. The failure mileage was approximately 80,400.”

The records describe a problem worth checking before purchase.

“Was driving down the road at 35 mph and the truck started to shake and the the transmission shifted really hard check engine light came on. Pulled over truck wouldn’t go into reverse and wouldn’t shift correctly. Had my truck towed home called the dealership they said I will need to have it towed in. Several days later the check engine light was off I took the truck around the block it was running okay. Drove it the next day it did the same thing shook really bad shifted hard and wouldn’t shift correctly my go I took reverse. Had it towed to the dealership. The dealership said it was the same problem they are having on other trucks with this same transmission truck is out of warranty and GM will not cover the cost to fix it.”

The records describe a problem worth checking before purchase.

“On November 20, 2025, my 2022 GMC Sierra 1500 AT4 equipped with the 3.0L Duramax diesel engine began experiencing intermittent engine overheating conditions. Concerned about a potential safety issue, I contacted a GMC dealership and was advised that because no diagnostic trouble codes were present, there was nothing to diagnose or repair and that I should continue driving the vehicle. Over the following months, the overheating condition continued intermittently. On May 24, 2026, while driving on the highway, the vehicle suddenly overheated, displayed fault code P1098, and entered reduced power ("limp mode"). The vehicle lost normal performance and acceleration while traveling in traffic. This created a significant safety hazard because the vehicle was unable to maintain normal highway speeds, increasing the risk of a rear-end collision or other traffic accident. The loss of power occurred while driving and without sufficient warning, leaving the vehicle unable to safely perform as expected in highway traffic. After researching this issue, I found numerous reports from other GMC and Chevrolet owners describing similar overheating, coolant control valve, thermal management system, and P1098-related failures. Many owners report symptoms involving engine overheating, reduced engine power, and limp mode operation while driving. I am concerned that this may indicate a broader defect involving the vehicle's cooling system and thermal management components. The vehicle exhibited overheating symptoms for approximately six months before the final failure occurred. Additionally, I understand that certain GM vehicles have been subject to service actions involving coolant control valves and thermal management system components. Given the similarity of symptoms, I am concerned that the overheating condition reported in November 2025 may be related to the same type of failure mechanism, yet my vehicle has not been included in any recall or special coverage program.”

The records describe a problem worth checking before purchase.

“The contact owns a 2022 GMC Sierra 1500. The contact stated upon shifting to park(P) and attempting to turn off the vehicle, the message "Shift to Park" was displayed. The contact waited and attempted to park and turn off the vehicle again, and the vehicle responded after several attempts. The vehicle was taken to the dealer, where it was diagnosed that the shifter assembly needed to be replaced due to internal short to the solenoid not allowing the vehicle to detect that it was in park(P). The vehicle was being repaired. The manufacturer was notified of the failure and a complaint filed. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 24,000.”

The records describe a problem worth checking before purchase.

“The transmission on the vehicle failed, it is currently sitting at a GMC dealership awaiting repair. However the valve body is on back order and there is no time table for repair to occur. My family and my safety was put at risk not knowing that the 10 speed transmission could result in rear tire lockup while on the highway, also the inability to put the truck in reverse to back away from any potential hazard. The problem was confirmed by GMC of Attleboro Mass. The vehicle was inspected by technicians at said dealership. There were no prior warnings, however the truck did feel hesitant to shift on the highway a week or two prior to failure.”

The records describe a problem worth checking before purchase.

“The contact owns a 2022 GMC Sierra 1500. The contact stated while driving, the vehicle decelerated unintendedly and failed to exceed 50 MPH on several occasions. The check engine warning light illuminated, and the message " Reduced Acceleration - Drive With Care" was displayed. The vehicle was taken to the dealer on several occasions, and the OnStar sensors, the fuel injectors and 8 spark plugs were replaced; however, the failure persisted. The vehicle was taken back to the dealer, who retrieved DTCs: P0747, indicating a pressure control solenoid A stuck on failure, and P0700, indicating a transmission control module failure. The dealer determined that the failure was related to GM Special Coverage Number: N242454441 (Momentary Rear Wheel Lock-Up); however, the VIN was not included. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance in adding the VIN to the Special Coverage. The failure mileage was approximately 95,000.”