HouseCallAuto 2/9/2012If you did not buy an ACDELCO unit I am not surprised. I recently had the same issue on a car, I forget what car it was. I then bought ACDELCO and the problem was no more.
HouseCallAuto 2/9/2012There are only two possible causes here. When you remove the regulator ass'y from the door and you are able to move the window up and down with your hand from the bottom of the window (just like the regulator does) you will either be able to move the window easy and smooth or not. If it has a window track binding the window you will immediately feel it in the "up" direction or you won't. Make sure that the rubber guides that the window rides in are there and have not peeled out. That being said, if the window moves too slowly and you are using anything but OEM, I told you what to do. Do not lubricate the track.