See also:

OnStar®
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services. See OnStar Overview&nb ...

Engine Coolant Heater
The engine coolant heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below 0°F (−18°C). Vehicles with an engine coolant he ...

Automatic Dimming Rearview Mirrorwith Compass
Your vehicle may have an automatic-dimming rearview mirror with a compass. (On/Off): This is the on/off button for the automatic dimming feature and compass. ...