1998 GMC Safari Owner's Manual - Page 156

1 1I Function Knob This knob is next the temperature knob. The function to knob allows you to choose direction of air delivery. the OFF: Thissetting turns the system off. Rear Heating System (Option) - /J VENT: The air comes out at the vents on your instrument panel. BI-LEVEL: Withthissetting,theheated outside a r comes out both the instrument panel vents i and heater vents. Adjust the temperature knob for warmer or cooler air. +a +# =+a I I + of the air comesout near the HEATER: ' Most 0 floor. The rest comesout from the defroster vents under the windshield and at the front windows. side w BLEND: With this setting, the heated outside air comes out both the heater vents and defroster vents. Adjust the temperature knob warmer or cooler air. for DEFROST This setting operatesthe defroster. Most of the air comes out near the windshield, with some goingto the floor vents andfront side windows. 9 You may have the optional rear heater. The three-speed fan switch is to the right the radio. Turn the switch of toward HIGH for higher airflow in the rear area. r T n u the switch to the OFF position to turn the system off.