Circuit/System Verification
WARNING: This page is about a different car, the 2010 GMC Terrain and 2010 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, headlamps ON, turn the high beam headlamps ON and OFF using the Turn Signal/Multi-Function Switch. The high beam headlamps should turn ON and OFF when changing between the selected states.