1994 GMC Sonoma Owner's Manual - Page 124

Clock To set the clock, just: Press the SET pushbutton. Within 5 seconds, press and hold SEEK until the correct minute appears on the display. 0 Press and hold SCAN until the correct hour appears on the display. TREBLE Slide the TREBLE lever up to increase the treble response. If a station is weak or noisy, slide the TREBLE lever down to reduce the noise. BASS Slide the BASS lever up to increase the bass response. Adjust the BASS lever to give a pleasing sound to your ear. How to Operate Your ET@ AM-FM Stereo Audio Cassette System This part tells you how your ETR@AM-FM stereo audiocassette system works: Upper Knob (PWR-VOL-PROG-RCL) The upper knob has these five functions: Rotate it to turn the system on and off. 0 0 Rotate it to control the volume. Press it to display the time when the ignition is off (RCL ). 0 Press it to change between the clock and the radio station frequency displayed when the radio is on (RCL ). Press it to change sides of a tape when a cassette is playing (PROG ). 3-10