Heating; Ventilation System - GMC 1997 Suburban Owner's Manual

Ventilation System
For mild outside temperatures when little heating or
cooling
is
needBd, use
VENT to
-direct outside
air
through
your
vehicle. Air
will flow
though the
instrument panel outlets.
Your vehicle's ventilation system supplies outside
air
to the inside
of your
vehicle when it
is moving.
W i t h
the
side
windows closed, air will
flow into
the h a t
air inlet grilles, though
the vehicle,
and
out the
air
exhaust valves.
Outside air will also enter
the
vehicle
when
the heater qr
the air conditioning fan is
running, unless
you
have
the
recirculation button pushed
in. For more
infomation
on
the recirculation button, see "Air
C~onditiQning" earlier
in
this section.