1995 GMC Sonoma Owner's Manual - Page 115

Comfort Controls& Audio Systems Section In this section you'll find out how to operate the comfort control systems and audio systems offered with your vehicle. Be sure to read about the particular system suppliedwith your vehicle. Comfort Controls Heater Controls If your vehicle does not have air conditioning, your heater controls will look like this. To The switch with the fan symbol changes the fan speed. increase the fan speed, push the switch upward toward HI. To decrease the fan speed, push the switch downward toward LO. The upper knob changes the air temperature.Turn the knob clockwise for warmer air. Turn the knob counterclockwise for cooler air. 3-1