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 wheel house panel access plugs.
Remove the nuts that retain the panel to the flare.
Remove the screws that retain the flare to the panel.