We just brought home a 2021 Acadia Denali and have had two instances where it has had trouble shifting into gear. Feels like a bad transmission slip that gets to the point that I can't even drive it out of my driveway now (car is in drive, engine revs like it is in neutral).
I was able to get it drivable again the first time it happened by switching it in and out of tow/haul mode as that seemed to force it to pick up a low gear. The dealer couldn't reproduce it and just reprogrammed some software per a GM bulletin, but the issue re-occurred a day later. I didn't use the tow/haul 'trick' to force it back into gear so the dealer can experience the issue.
Since this is a new model, I was curious if any other '21 owners had any transmission issues to report. It is possible I just got a lemon that was put together late on a Friday afternoon...
I was able to get it drivable again the first time it happened by switching it in and out of tow/haul mode as that seemed to force it to pick up a low gear. The dealer couldn't reproduce it and just reprogrammed some software per a GM bulletin, but the issue re-occurred a day later. I didn't use the tow/haul 'trick' to force it back into gear so the dealer can experience the issue.
Since this is a new model, I was curious if any other '21 owners had any transmission issues to report. It is possible I just got a lemon that was put together late on a Friday afternoon...