See also:

Headlamp High/ Low-Beam Changer
(Headlamp High/Low Beam Changer): To change the headlamps from low to high beam, push the lever toward the instrument panel. To return to low-beam headlamps, pull the multifunction lever toward you. ...

Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps
A. Low-Beam Headlamp B. High-Beam Headlamp C. Sidemarker Lamp D. Park/Turn Signal Lamp To replace one of these bulbs: 1. Turn the tire to reach the access port cap located in the front of wheel ...

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 vehic ...