WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Insert the bulb into the bulb socket and twist clockwise to install.
Insert the forward edge of the lens into the opening and press the rear edge downward to install.