MyDefectiveGMC
New member
- Sep 9, 2022
- 3
- 0
I have a 2020 AT4 and absolutely loved it up until March. Now I'm having constant transmission issues. Started out. I'd be running down the highway at 80 and it felt like you ran over a speed bump. Come to find out. For some reason the transmission is downshifting but immediately shifts back up. At first they were trying to tell me it was caused by the regen for the def but I finally got them to take it for more than a 2 mi test drive and they realized it was not that. Then they changed a valve body that didn't fix it. Flew in a GM engineer. He said it was a module took almost 2 months for that to come in change that didn't fix it. Now they've just replaced my transmission. Didn't take it for a test drive afterwards and that did not fixed either. Reading a lot. People say it's a torque converter.
Does anybody know what I can tell my dealership to do to fix this?
Proud Chevy Truck legend. Life time GM owner.
Does anybody know what I can tell my dealership to do to fix this?
Proud Chevy Truck legend. Life time GM owner.