2021 GMC Acadia Transmission and drivetrain Problems

“Wife was driving southbound on us287 between vernon, tx and wichita falls, tx in a 75mph speed zone. Vehicle abruptly and for no apparent reason slowed as if the brakes had been applied with sufficient force to cause her to bend forward at the waist. Subsequently, the vehicle speed became erratic and she slowed to 25 while moving onto the shoulder. Could easily have caused a fatal accident had traffic not been unusually light. I am enclosing GM service bulletin issued in july of 2020 (I found it posted on the NHTSA web site) regarding the transmission used in this car. …”

“My vehicle stops working while in traffic when the auto stop is engaged. The abs, parking brake, and dash flashes prior to the engine stopping. I have been to the dealership multiple times and they are never able to recreate the issue. The check engine light codes produced are P0014 and c0800-03.”

“This is a very known issue that has been reoccurring with GMC Acadia. The torque converter slipping. That cost alone is over $7.000 for the transmission. I am still making monthly payments for my 2021 Acadia. With rising cost above the board GMC could have resolved this issue before releasing this vehicle to the public for purchase. Only had this vehicle for 2 years and already a new transmission is needed. Other individuals i personally know have the same issue. From my research GMC is aware and fails to do a recall on this issue.”

“I have had nothing but issues with this vehicle from the day I purchased it. I should have been more leery of purchasing a vehicle with so few miles on it as a certified vehicle. First issue lift gate wouldn’t work. Had to have sensors replaced twice. Next was the purge valve sensor that has went bad 3 separate times. Then the crankcase vent sensor. Paid a fee for diagnostics, it was not repaired took it back when the engine light came back on, they replaced it without charging but I was advised it’s not covered under warranty. …”

“Was accelerating to approx 45-50mph when the vehicle gave no power, but my RPMs were revving. Once removing my foot off the gas pedal and trying to get power back, after the 2nd or 3rd time I resumed power. The car has less than 9000 miles on it. Right after, a message alerted me to have the vehicle brought in for service, and the engine light came on. According to the dealership, the found code P0700 which is normal, followed by P7224, something I am unable to locate anywhere online. They said they tested everything and all came back normal. …”