Removal Procedure

Roll the window up completely.
Remove the trim panel. Refer to TRIM PANEL REPLACEMENT - DOOR .
Use a sharp bladed tool, if needed, in order to separate the water deflector at the perforations. Refer to WATER DEFLECTOR REPLACEMENT - FRONT DOOR .
Remove the door to window run channel bolt.

Fig 1: Removing & Installing Window Run Channel
Courtesy of GENERAL MOTORS CORP.
Pull the run channel away from the upper channel (which is part of the door) in order to remove the window run channel from the door.