So after months of back and forth with the dealership we finally got GM to fly an engineer out. He drove it and diagnosed the problem as the valve body on the transmission. They replaced and we’ve been good to go, no stuttering, truck is running awesome.
Hi - have a 2021 burban with the 3.0. Truck has 6000 miles on it. Has been in the dealer for multiple check engine and emission systems issues. Those ha e been corrected with connector replacements.
since the first check engine it has been stuttering when accelerating. It feels like a fish...