See also:

When to Change Engine Oil
This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on a combination of factors which include engine revolutions, engine temperature, and miles ...

Compass Messages
CAL This message is displayed when the compass needs to be calibrated. See Compass. Three dashes will be displayed if the compass needs service. See your dealer for service. ...

Navigation
OnStar navigation requires the Directions and Connections service plan. Push to receive directions or have them sent to the vehicle navigation screen. Destinations can also be forwarded to the v ...