Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Position the lower retainer to the trim panel.
Align the upper retainer clip to the door frame.
Install the upper extension by pressing into place until fully seated.

Fig 1: Trim Panel - Upper Extension
Courtesy of GENERAL MOTORS CORP.