2010 GMC Acadia Owner's Manual - Page 194

7-6 Infotainment System If the Rear Seat Audio (RSA) is turned on, the radio disables FADE and mutes the rear speakers. To quickly adjust all speaker and tone controls to the middle position, press f for more than two seconds until a beep sounds. Radios with CD and DVD fade differently depending on the DVD Media type: . Radio AM-FM Radio Radio Data System (RDS) The Radio Data System (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 display. 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. 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/retailer for service. Locked: This message displays when the THEFTLOCK® system has locked up the radio. Take the vehicle to your dealer/retailer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your dealer/retailer. With DVD‐A 5.1 Surround media, the left front and right front speakers fade rearward, leaving the center front speakers unaffected until the last fade step, then all front speakers mute. With DVD‐V 5.1 Surround media, surround sound is maintained until Step 4 of the Fade control is reached while fading rearward. At that point the audio system output changes to Stereo to prevent the loss of Center channel output when the full rearward fade position is reached. .