WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Remove the screw from the front of the defroster grille.
Remove the defroster grille (1) using a small flat-bladed tool from the instrument panel (I/P) (2).
Fig 1: Removing Defroster Grille From Instrument Panel (Chevrolet)