WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Luggage Shade
Courtesy of GENERAL MOTORS CORP.
Remove the luggage shade from the pocket assembly.
Install 4 hooks into the rings on each side of the rear luggage area.