GMC 1997 Safari Owner's Manual page 148

Comfort Controls
This section tells you how to make your air system work
for you. Your comfort control system uses
ozone-friendly R- 134a refrigerant.
With these systems, you can control the heating, cooling
and ventilation in your vehicle. Your vehicle also has a
flow-through ventilation system described later in
this section.
Heating/Air Conditioning System
If your vehicle has air conditioning, your heating/air
conditioning controls will look like this.
Fan Knob
This control has four positions. To increase airflow,
turn the knob toward HI. To decrease airflow, move it
toward LO.
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.
Function Knob
This knob is next to the temperature knob.
OFF: This setting turns the system off.
MAX A/C: This cools the air the fastest, by
recirculating the inside air. Move the temperature knob
all the way counterclockwise.
A/C: This setting brings in outside air and cools it.
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