Chevrolet Silverado Classic 2007 Owner's Manual page 228

Temperature Knob
The middle knob on the control panel lets you
select the temperature of the air flowing into
the passenger area. Turn the knob clockwise
toward the red area for warmer air. Turn the
knob counterclockwise toward the blue area
for cooler air.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
H
(Vent): This mode directs the air through the
instrument panel outlets.
)
(Bi-Level): This mode directs air through
the floor outlets as well as the instrument panel
outlets. The flow can be divided between vent
and floor outlets depending upon where the
knob is placed between the settings.
228
6
(Floor): This mode directs most of the air
through the floor outlets, and the rest of the
air is divided between the windshield defroster
outlets and the side window defroster outlets.
W
(Defog): Airflow is delivered through the floor
outlets, the windshield defroster outlets, and
the side window defroster outlets. The air flow can
be divided between floor and defrost depending
upon where the knob is placed between the
settings.
1
(Defrost): This setting directs most air
through the windshield defroster outlets, side
window defroster outlets, and some through
the floor outlets.