Hey guys, I just bought at 2005 Grand Prix GT. When I test drove the car I pushed the traction control button and it turned the traction control off just like it was supposed to. Today I picked the car up and tried the traction control button and nothing happens. The dealership did a couple things between when I test drove it and today when I picked it up. The took one of the rear tires off to fix it because it had a nail in it and they took the radio out and fixed it as well because the volume wouldn't turn up or down unless you used the steering wheel. Is there any way that either one of these things would have done something to the traction control button?? If not, what could possibly be wrong? Thanks in advance for any advice. I plan on taking it back to the dealer and having them take care of it but I figure if it is something easy that I can try to look at then I will attempt it before I bring it back. Thanks again!