and while you are at the dealership have them replace the forward wiring harnesses on your fog lights. There is a TSB on this very issue. You will keep replacing bulbs one after another until they fix this. TSB is 05-08-42-013.
On the service stabilitylight, when the light comes and car is under warranty, waste no time taking it in.
Without these problems it has been one of the sweetest cars I have ever owned!
. I agree completely. Don't get unnerved by the little quirks. Mine has been great in the four months I've owned it. A few people here have a long list of problems, but I'm not sure that is a GXP issue as much as a GM issue.
The other known problem is the Intermediate Shaft clunking. THE MINUTE you feel weird clunks in the steering, especially when turning the wheel at low speed, back to the dealership you go. There is a TSB on that as well.
I think the only other known common problem is with the window regulators, although there are several TSBs listed here http://www.bonnevilleclub.com/forum/...r=asc&start=20