2011 Chevrolet Impala Owner's Manual - Page 178

7-6 Infotainment System 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. Radio AM-FM Radio Radio Data System (RDS) The radio may have 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 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. 4 (Information) (RDS Features): For vehicles with RDS features, press 4 to display additional text information related to the current FM-RDS station. If information is available, the song title information displays on the top line of the display and artist information displays on the bottom line. When information is not available, "NO INFO" displays. Auto Text (RDS Features): If additional information is available for the current song being played, Auto Text will automatically page/scroll the information every three seconds above the FAV presets on the radio display. By default, Auto Text is enabled. Radio Messages Calibration Error: Displays if the radio is no longer calibrated properly for the vehicle. The vehicle must be returned to your dealer for service. Loc or Locked: Displays when the TheftLock® system has activated. Take the vehicle to your dealer for service. If any error occurs repeatedly or if an error cannot be corrected, contact your dealer.