1997 GMC Safari Owner's Manual - Page 149

+ This setting brings in outside air BI-LEVEL: ' through the heater floor vent and the instrument panel vents. If you move the temperature knobbetween hot and cold, cooler air come out of the upper vents will of while warmer air comes out the floorvent. The air conditioning compressor may operate in this setting to cool the air. *e Heating System /J VENT: The air comes out at the vents on your instrument panel. The air conditioning compressor will not run in this position.Adjust the temperatureknob for warmer or coolerair. floor. The rest comes out from the defroster vents under the windshield and at the front side windows. +e +' w e HEATER: Most of the air comesout near the If your vehicle does not have air conditioning,your heater controls will look like this. + this setting, theheated outside air BLEND: With ' comes out both the heater vents and defroster vents. Adjust the temperature knob for warmer or coolerair. Fan Knob This control has four positions. To increase airflow, turn the knob toward HI. To decrease airflow, move it toward LO. 9DEFROST: This setting operatesthe defroster. Most of the air comes out nearthe windshield, with some going to the floor ventsand front side windows. Temperature Knob This knob is next to the fan knob. It selects the temperature of the air flowing into your vehicle. Move the knob clockwise for warmer air. Move the knob counterclockwise for cooler air. 3-3