See also:

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 ...

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 your vehicle a ...

RDS (Radio Data System)
The radio may have RDS. The RDS feature is available for use only on FM stations that broadcast RDS information. This feature only works when the information from the radio station is availa ...