See also:

Fog Lamps
To turn on the fog lamps, the ignition and the headlamps or parking lamps must be on. If the fog lamps are turned on while the exterior lamp switch is in the AUTO position, the headlamps come on ...

Navigation
This display is used for the OnStar or Navigation System Turn-by-Turn guidance. See OnStar Overview or the navigation manual, if the vehicle has navigation, for more information. ...

Radio Messages
CAL ERR (Calibration Error): The audio system has been calibrated for your vehicle from the factory. If CAL ERR displays, it means that the radio has not been configured properly for the vehicle a ...