See also:

Automatic Headlamp System
When it is dark enough outside, the automatic headlamp system turns on the headlamps at the normal brightness, along with the taillamps, sidemarker, parking lamps, and the instrument panel l ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...

Exterior Lamp Controls
The exterior lamp control is located toward the end of the turn signal/lane change lever. (Exterior Lamp Control): Turn the band with this symbol on it to operate the exterior lamps. The e ...