WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Striker & Spacer To Door Frame
Courtesy of GENERAL MOTORS CORP.
Open the door.
Mark the position of the striker on the door frame.
Remove the 2 bolts that retain the striker to the door frame.
Remove the striker and spacer from the door frame.