See also:

General Information
For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks: ...

Headlamp High/Low-Beam Changer
Headlamp High/Low-Beam Changer: Push the turn signal/lane change lever away from you to turn the high beams on. Pull the lever toward you to return to low beams This indicator light turns on in t ...

Reactivation for Subsequent Owners
Push and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle. The Advisor will update vehicle records and will explain the OnStar service offers and options ...