GMC Canyon Owner's Manual page 174

Fan Knob
9
(Fan): The center knob on the control panel
is used to control the fan speed. Turn the
knob clockwise or counterclockwise to increase or
decrease the fan speed.
If the knob is set on "0" (zero), some outside air
will still enter the vehicle and will be directed
according to the position of the mode knob.
Mode Knob
The right knob on the control panel is used to
direct the airflow inside your vehicle. Turn the knob
to select one of the following modes:
H
(Vent): Select this mode to direct air to the
instrument panel outlets.
\
(Bi-Level): Select this mode to direct
approximately half of the air to the instrument
panel outlets, and the remaining air to the
floor outlets and the defroster and side window
outlets. Cooler air is directed to the upper outlets
and warmer air to the floor outlets.
174
[
(Floor): Select this mode to direct air to the
floor outlets. Recirculation is disabled in this mode
because interior window could fog under some
conditions. If this occurs, see "Defogging and
Defrosting" following.
Mode Buttons
@
(Recirculation): This mode recirculates air
inside the cabin, and prevents outside air from
coming in the vehicle. It can be used to prevent
outside odors from entering your vehicle and
cool the air inside your vehicle more quickly. Press
this button to turn the recirculation mode on or
off. An indicator light on the button will come on to
let you know the recirculation mode is activated.
Recirculation is only available in the bi-level
and vent modes. It should only be used while in
bi-level and vent modes. Recirculation is not
available, and the light will not come on or flash
while in heat, floor, floor/defog, or defrost modes.