WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
Remove the screws that retain the instrument panel sound insulator to the following components:
The instrument panel
The cowl
Remove the instrument panel sound insulator from the vehicle.
Fig 1: Removing Instrument Panel Sound Insulator From Vehicle