Defogging And Defrosting - GMC 2008 Envoy Denali Owner's Manual

Driver's Side Temperature Lever: The lever on the
left side of the climate control panel is used to raise
or lower the temperature on the driver's side of
the vehicle. Slide the lever up or down to adjust
the temperature.
Passenger's Side Temperature Lever: The lever on
the right side of the climate control panel is used to raise
or lower the temperature on the passenger's side of
the vehicle. Slide the lever up or down to adjust the
temperature. This lever also adjusts the temperature
to the rear seat outlets.
When the temperature outside is 0°F ( 18°C) or lower,
use the engine coolant heater, if the vehicle has
one, to provide warmer air, faster to your vehicle.
#
(Air Conditioning): Press this button to turn the
air-conditioning system on or off. When the button is
pressed, an indicator light will come on and the system
will begin to cool and dehumidify the air inside of the
vehicle. You may notice a slight change in engine
performance when the air conditioning compressor
shuts off and turns on again. This is normal.
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Defogging and Defrosting

Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control system is used
properly. There are two modes to choose from to clear
fog or frost from your windshield. Use the defog mode
to clear the windows of fog or moisture and warm the
passengers. Use the defrost mode to remove fog or
frost from the windshield more quickly.
Turn the right knob clockwise or counterclockwise to
select one of the following modes:
-
(Defog): This mode directs the air to the
floor outlets, windshield and side window outlets.
The recirculation button cannot be selected while in
defog mode.
1
(Defrost): This mode directs most of the air to the
windshield and the side window outlets, with only a little
air directed to the floor outlets. The air conditioning
compressor may run to dehumidify the air to prevent
window fogging. The recirculation button cannot be
selected while in defrost mode. Do not drive the vehicle
until all the windows are clear.