I have a 1993 gmc Sierra extra cab had slight miss

SOURCE: Power Window in a 2001 GMC Sierra Extended Cab

i just changed my unit on drivers side door man it was a pain well first it started off with not going at all i thought it was the motor but motor was good the wire was just getting hung up because the plastic piece broke on the track,so first disconnect motor from track and hit switch to see if it turns,and if not then replace motor,be careful not to loosen the cable.you almost need it exact tension for the track to work right.