1995 GMC Sonoma Owner's Manual - Page 127

How to Operate Your ETW AM-FM Stereo Audio Compact Disc (CD) System This part tellsyou how your ETR' AM-FM Upper Knob (PWR-VOL) - stereo system works: The upper knob has two functions: Turn it to turn the system on and off when the ignition is on. Turn it to control the volume. Volume will be displayed briefly unless LeftRight speaker control, Rearmrontspeaker control, BASS TREB or are adjusted. Left/Right Speaker Control- The control ring behind the upper knob allows you to balance the sound between the left and right speakers. Balance will be displayed briefly when using this control. Lower Knob (TUNE-BAND) - The lower knobhas two functions: Turn it to tune in radio stations. Press it to change between the AM and FM bands. RearFront Speaker Control - The control ringbehind the lower knob fades the soundbetween your rear and front speakers. Fadelevels will be briefly displayed. SEEK -Press the SEEK higher station. button to cause the receiver to seek the next Press the 4 SEEK button to cause the receiverto seek the next lower station. SCAN - Press the SCANbutton to hear each station for a few seconds. Push it again when you reach the station you want to listen to and the radio will stop scanning. "SC" appears the display. in 3-13