1993 GMC Sonoma Owner's Manual - Page 141

How to Operate Your E T P AM-FM Stereo Audio Cassette System K4310 This part tells youhowyour works: ETR@ AM-FM stereo audio cassette system P WR (Power) The PWR button switches the radio onand off. Upper Knob Theupperknobdoes rotation. It tells you the time. (When the ignition is off,push the RCL knob to display the time.) It allows you to hear the otherside of the tape. (Press the RCL knob while the cassette is playing.) these three things: increases volumewithclockwise It controls the volume. TheVOLknob BAL (Balance) The control behind the upperknob allows you to balance the soundbetween the right andleft speakers. Lower Knob Turn the lower knob to tune inradiostations.Push it to get AM or FM. 3-1 3