1997 GMC Savana Van Owner's Manual - Page 129

The right knob changes the heater setting. instrument panel vents. BI-LEVEL: Use this setting to divide airflow between the heater floor vents and instrument panel vents. +. /J +. '# e Mode Knob HeatedAir Conditioning Controls VENT: This setting directs air through the + setting directs air through the heater HEAT This ' floor vents. This setting is useful for coldweather. w. +HHEATmEFROST: Use this setting to divide airflow between the heater floor vents and windshield. DEFROST This setting directs air through the windshield defroster vents. This setting is useful when you have fog or ice on windshield. the If your vehicle has air conditioning, your heatedair conditioning controls will look like this. Before using your vehicle's air conditioning, open the windows to clear the vehicle of hot air. 3-3