2011 GMC Savana 2500 Passenger Owner's Manual - Page 177

Infotainment System 3. Adjust the setting by doing one of the following: . 7-7 Radio Messages Calibration Error: The audio system has been calibrated for the vehicle from the factory. If Calibration Error displays, it means that the radio has not been configured properly for the vehicle and it must be returned to your dealer for service. Locked or Loc: One of these messages will display when the TheftLock® system has locked up the radio. Take the vehicle to your dealer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your dealer. Radio AM-FM Radio Radio Data System (RDS) The Radio may have a Radio Data System (RDS). The RDS feature is available for use only on FM stations that broadcast RDS information. This system relies upon receiving specific information from these stations and only works when the information is available. While the radio is tuned to an FM-RDS station, the station name or call letters displays. In rare cases, a radio station could broadcast incorrect information that causes the radio features to work improperly. If this happens, contact the radio station. Turn the f knob clockwise or counterclockwise. Press the ¨ SEEK, or © SEEK. Press the \ FWD, or s REV. . . To quickly adjust all speaker and tone controls to the middle position, press the f knob for more than two seconds. If the Rear Seat Audio (RSA) is turned on, the radio disables FADE and mutes the rear speakers.