1993 GMC Sonoma Owner's Manual - Page 137

How to Operate Your ETW AM Radio R h t- K4308 This part tells youhowyour ETR@ AM radio works. PWR (Power) The PWR button switches the radio onand off. Upper Knob Theupperknobdoes these three things: It controls the volume. The VOL knob increases volumewhen rotated clockwise. It tells you the time. (When the ignition is off, push the RECALL knob to display the time.) I t allows you to RECALL the frequency when the radio is playing. 5 AL (Balance) The control behind the upper knob allows youto balance the soundbetween the rightand left speakers. Lower Knob Turn the lowerknow to tune inradio stations 3-9