Rear Side Door Sill Plate Replacement (Extended Cab)
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Rear Side Door Sill Plate (Extended Cab)
Courtesy of GENERAL MOTORS CORP.
Rear Side Door Sill Plate Replacement (Extended Cab)