I have a 96 GT Coupe. the passenger side door window had good size chuck of cement put through it when my car was broken into. So I paid Safe-light to come out and fix it as I did not have the time. The repair guy tells my wife that we cant use the window as the the regulator is broken. Now the window worked fine before now all the sudden the regulator is broke. and the window cant be used. how likely is this? I have repaired windows myself in the past and have Never experienced this situation. Opinions please???