2024 GMC Sierra 2500 power train problems

“driving down the road going to and intersection the dash says I received a Service ESC message followed by a Reduced Acceleration warning on the center display. I also had the forward collision, traction control and check engine lights come on. I also noticed the shudder/jerk. The truck is giving a P060C code and when i was driving it dies in the intersection of the road and will not start back up. puts the computer in a safety mode. I have call my local GM dealer and they did not fix it and it happen twice. I the truck dies in the middle of the road and no way to start's it and if a big rig crashes in to the truck some one or more than one will be hurt or killed”

“While driving my truck on the highway at 65 mph the truck bucked hard and immediately downshifted into 2nd gear. This caused me to rapidly decelerate to approximately 40 mph, I am lucky there was not another vehicle behind me when this happened since rapid unexpected deceleration without brake lights is very dangerous. I had to drive the truck in limp mode at 45mph and approximately 4500 rpms to the nearest exit. This event illuminated the trucks check engine light and displayed a brief service 4WD message followed by a permanent reduced acceleration message on the dash.”

“The control valve body failed. There are so many, that there was a shortage of parts. Had to take it in as it went into limp mode. 34,000 miles. There were dozens of trucks, same year, waiting for the same repair. Shop says probably every truck will need it. It is a known issue.”

“The contact owns a 2024 GMC Sierra 2500. The contact stated that while driving at an undisclosed speed, the rear axle unexpectedly locked up, and the vehicle stopped in the middle of the road. The rear axle independently released, and the vehicle was driven back to the residence. The dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 76,300.”

“While towing my fifth-wheel trailer, I was descending a hill (I had my tow/haul switch engaged) when I noticed an issue with my vehicle. Upon reaching the bottom of the hill and beginning to decelerate, when applying gas to continue up the hill the vehicle shuddered noticeably. A warning light briefly illuminated on the dashboard and then turned off shortly afterward. Although the warning light went away, the vehicle continued to exhibit a slight vibration, particularly between approximately 25 and 50 mph. I was able to drive the vehicle home safely and subsequently brought it to the dealership for inspection. The dealership performed a diagnostic scan and retrieved fault codes. Based on their findings, they have determined that the transmission requires replacement and are proceeding with that repair. They also found a different fluid in the transmission fluid, they skipped the testing and got permission to change out the transmission”

“I was merging onto the highway in my 2024 GMC Sierra 2500HD AT4X equipped with the 6.6L Duramax engine at about 50mph when the gauge cluster emitted a “Reduced Acceleration Drive With Care” message followed by a check engine light. The check engine light presented indicated a “P0747” and “P0700” code. The vehicle was then stuck in 5th gear at highway speeds. Luckily there was no traffic present during this event due to the reduced acceleration of the vehicle and confusion caused to the operator. This could have been a dangerous situation due to the sudden change in handling of the vehicle. I have since then had the vehicle towed to the dealership in which it was purchased from for them to do their investigation to see how to fix the issue. This is a very well known issue with these GM heavy duty pickups. There is currently a recall on these trucks for this exact issue but my truck at this point in time is not included in said recall. I believe the recall is for 2020-2022 vehicles. Mine happens to be a 2024 which uses the same transmission as the older model vehicles in the recall. There are many other owners of these trucks like myself who have experienced this…”