WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Lower Decklid Bumpers
Courtesy of CHRYSLER LLC
Open the deck lid.
Remove the push-pin fastener (1) that secures the lower bumper (2) to the rear fascia flange that extends over the deck opening lower panel.