1997 GMC Suburban Owner's Manual - Page 166

SCV: Your system has a feature called Speed-Compensated-Volume (SCV). With SCV, your audio system adjusts automatically to make up for road and wind noise as you drive. Setthe volume at the desired level. Move the control ring behind the upper knob clockwise to adjust the SCV. Then, as you drive, SCV automatically increases the volume, as necessary, to overcome noise at any particular speed. The volume level should always sound the same to you as you drive. If you don't want to use SCV, turnthe control all the way down. Each detent on the control ring allows for more volume compensation at a faster rate of speed. SCAN: Press and hold SEEK for two seconds until SCAN appears on the display. SCAN allows you to listen to stations for a few seconds. The receiver will continue to scan and momentarily stop at each station until you press the button again. The sound will mute while scanning. PUSHBUTTONS: The six numbered pushbuttons let you return to your favorite stations. You can set up to 18 stations (six AM, six F M 1 and six FM2). Just: 1. Turn the radio on. 2. Press AM-FM to select the band. 3. Tune in the desired station. 4. Press AUTO TONE to select the setting you prefer. Finding a Station AM-FM: Press this button to switch between AM, FM I and FM2.The display will show your selection. TUNE: Press this knob lightly so it extends. Turn it to choose radio stations. Push the knob back into its stored position when you're not using it. 5. Press and hold one of the six pushbuttons. The sound will mute. When it returns, release the button. Whenever you press that numbered button, the station you set will return and the tone you selected will be automatically selected for that button. 6. Repeat the steps for each pushbutton. SEEK: Press the right arrow to tune to the next higher to station and the left arrow to tune the next lower station and stay there. The sound will mute while seeking. 3-16