WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Remove the sliding door-opening carpet retainer (1) from the carpet retainer(s) support using the J 38778.
Fig 1: Removing Sliding Door-Opening Carpet Retainer From Carpet Retainer Support