Removal Procedure

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Swing the spare tire carrier fully outward.
Open the endgate.
Open the midgate and release the midgate weatherstrip from the lower pinch-weld flange.

Fig 1: Cargo Tie Down Loops

Courtesy of GENERAL MOTORS CORP.

Remove the floor tie down bracket bolts (1).
Remove the tie down loops (2).
Lift the rear body opening frame floor from the body.

Fig 2: Identifying Floor Drains

Courtesy of GENERAL MOTORS CORP.

With a flat-bladed tool, pry the floor drain (1) gently upward in order to release the drain from the cargo box.
Remove the drain valve (2) from the vehicle.