GMC 2002 Savana Van Owner's Manual page 142

Mode Knob
The right knob changes the airflow setting.
(Vent): This setting directs air through the
instrument panel vents.
-
(Bi Level): This setting divides airflow between
the heater floor vents and instrument panel vents.
(Floor): This setting directs air through the
floor vents.
(Floor/Defog):This setting divides airflow
between the heater floor vents and windshield.
DEF (Defrost): This setting directs air through the
windshield defroster vents. This setting is used to
remove fog or ice from the windshield.
Heater/Air Conditioning Controls
(If Equipped)
If your vehicle has air conditioning, your heater/air
conditioning controls will look like this.
Before using your vehicle's air conditioning, open the
windows to clear the vehicle of hot air.
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