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: Removing Nuts Retaining Striker Assembly To Liftgate Window
Courtesy of GENERAL MOTORS CORP.
Open the liftgate window.
Remove the nuts retaining the striker assembly to the liftgate window.
Remove the handle and striker assembly from the liftgate window.