Removal Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Starting at the lock pillar lift the sill plate unsnapping the clips from the door opening finish trim panel.
Unsnap the sill plate from the hinge pillar.
Slide the sill plate out from under the hinge pillar upper trim, and on the drivers side out from around the hood release handle and the foot rest.

Fig 1: Unsnapping Sill Plate From Hinge Pillar
Courtesy of GENERAL MOTORS CORP.