2008 Chevrolet Impala Owner's Manual - Page 194

Radio Data System (RDS) Your radio may have the Radio Data System (RDS) feature. RDS 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 can broadcast incorrect information that causes the radio features to work improperly. If this happens, contact the radio station. Speed Compensated Volume (SCV): Radios with Speed Compensated Volume (SCV) automatically adjusts the radio volume to compensate for road and wind noise as the vehicle increases or decreases speed while driving. The volume level should sound about the same while driving. To activate SCV: 1. Set the radio volume to the desired level. 2. Press the MENU button to display the radio setup menu. 3. Press the pushbutton under the AUTO VOLUM (automatic volume) label on the radio display. 4. Press the pushbutton under the desired Speed Compensated Volume setting (OFF, Low, Med, or High) to select the level of radio volume compensation. The display times out after approximately 10 seconds. Each higher setting allows for more radio volume compensation at faster vehicle speeds. Playing the Radio O (Power/Volume): Press to turn the system on and off. Turn this knob clockwise or counterclockwise to increase or decrease the volume. The radio goes to the previous volume setting when the radio is turned on. The volume can still be adjusted by using the volume knob. 3-70