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.

Install the sill plate.
Push the sill plate down until the sill plate locks into place.

Fig 1: Door Sill Plate (Rear)
Courtesy of GENERAL MOTORS CORP.