I've had a similar problem on mine unforutunatley its looking as if your either going to have to do some crazy wiring w/ replacement or some kind of advanced all day for a power window type work. Make sure that you check to see if your gears aren't burned out inside of the motor, if I'm thinking straight on that year buick they started putting the boxes around the motor to help prevent theft and to keep the wires from shorting (look what that accomplished). Try to keep out of that box as much as possible unless you read the manual well because even if it is a wire that is short your going through a lot of trouble just to get your window back working. Chances are though its nothing more than what was mentioned in an earlier post that doesn't need to be mentioned again. I'd just make sure that everything is connected properly first, then check all of my wires in the DRIVER door. Due to the fact that there is a lot more controls on that side, it is more likely that if there is a short that it will be on that side.