Ventilation System - GMC SIERRA DENALI 2002 Manual

Ventilation System

For mild outside temperatures when little heating or
cooling is needed, use vent and the outside air setting to
direct outside air through your vehicle. Air will flow in
through the instrument panel outlets.
Your vehicle's ventilation system supplies outside air to
the inside of your vehicle when it is moving. With the
side windows closed, air will flow into the front air
inlet grilles, through the vehicle, and out the air
exhaust valves.
Outside air will also enter the vehicle when the heater or
the air conditioning compressor is running, unless you
have the recirculation button pressed. For more
information on the recirculation button, see "Air
Conditioning" earlier in this section.
You can move the outlets from side
down to direct the flow of air. The left driver and
passenger outlets have shut off levers. Turn the lever to
the left to shut off air flow or to the right to allow air
flow. When you close an outlet, it will increase the flow
of air coming out of any outlets that are open. The
center outlet does not completely shut off airflow.
Your vehicle has air
outlets in the center and
on the sides of your
instrument panel.
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to side or up and
3-7