WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Front Compartment Sight Shields & Bolts
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
1
Radiator Support Sight Shield Fasteners (Qty: 8) Tip:
Push in center of retainer using pick to release.