I've been working with GM for over a week now because I've had all kinds of crap replaced and I just found out the car was damaged and repaired and not disclosed to me before sale.
It would appear they're all too busy figuring out who broke it, which has nothing to do with me, rather than insuring customer satisfaction.
My advice? Lawyer seems to be the only way to get their attention and get a resolution. If its within warranty parameters and you have everything documented than its a no brainer for a lawyer.
Here's my story
http://www.camaro5.com/forums/showthread.php?t=295776
Sorry friend, best of luck to you.