Quote Originally Posted by SUpercharggme View Post
I had the same problem on my wires 97 GTP. Only hers was the drivers side front window. The problem I found on hers was that a brown wire on the back of the drivers side switch was loose. You couldn't tell by looking at it but when you wiggled the connector the window would roll up and down. The first place I would look is on this switch since it controls all of the windows. You should be able to pull the switch out without taking the door panel off. Good luck.
This happened to me when I first got my car, drove me nuts until I took the connector out and fiddled with it.