Circuit/System Verification
WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, observe for proper operation of the brake system including the brake lights. Refer to Exterior Lighting Systems Description and Operation .