Created an account to add on to this thread. 2023 Sierra with the 5.3L, less than a year old. Sudden harsh shifts followed by limp mode. Got it to the nearest dealership where it’s been sitting since mid May. Needs a valve body. Backordered, no ETA. Going on 8 weeks now. Suggested transmission replacement to expedite repair, was told no.
I had to foot the bill for a rental the first 10 days (dealership had no loaners available). Been in various Buick Encores since then. I’m a contractor. I have a truck for a reason. An encore fits my tool bag, a few drill cases, minimal material, and that’s it. I can’t even get a ladder in there. Dealership’s stance is “that’s all we have, take it or leave it.” I’ve had to rent trucks (while in possession of the loaner Encore) to get tools, ladders, and materials to jobsites. I want my truck back.
I gave GM a shot after massive trouble with the EcoBoost engine on my F-150 I had previously. I didn’t think things could be any worse than that experience. Boy was I wrong. At least the F-150 waited until around 70,000 miles to start acting up. This truck has less than half of that. I’m beside myself that (a) this is happening, with much more prevalence than I thought, and (b), the general attitude of anyone at GM I’ve spoken to is “that’s just how things are” or a line of scripted corporate lip service.
If this happens to you, I sincerely hope your experience is better than mine has been so far.
