WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Releasing Tabs Retaining Air Deflector To Fascia
Courtesy of GENERAL MOTORS CORP.
Release the tabs that retain the air deflector to the fascia.
Remove the push-pins retaining the air deflector to the fascia.