Page 209 of 554

The climate control system uses the information
from these sensors to maintain your comfort
setting by adjusting the outlet temperature, fan
speed, and the air delivery mode. The system may
also supply cooler air to the side of the vehicle
facing the sun. The recirculation mode will also
be used as needed to maintain cool outlet
temperatures.
Defogging and Defrosting
Fog on the inside of the 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 clear fog or frost from your
windshield.
Use the mode up and down arrows to select
the defog mode. Use the defrost button to
select the defrost mode.
-(Defog):The defog mode is used to clear
the windows of fog or moisture and warm
the passengers. This mode directs air to the
windshield, oor outlets, and side window vents.
When you select this mode, the system turns
off recirculation and runs the air conditioning
compressor unless the outside temperature is
close to freezing. The recirculation mode cannot
be selected while in the defog mode. Do not
drive the vehicle until all the windows are clear.
0(Defrost):Press this button to remove
fog or frost from the windshield more quickly.
This mode directs most of the air to the
windshield and side window vents and some
to the oor vents. In this mode, the system
automatically forces outside air into your vehicle.
The recirculation mode cannot be selected
while in the defrost mode. The air conditioning
compressor runs automatically in this setting,
unless the outside temperature is close to freezing.
Do not drive the vehicle until all the windows
are clear.
209
Page 210 of 554

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear Window Defogger):Press this button
to turn the rear window defogger on or off. The
rear window defogger stays on for about
10 minutes after the button is pressed, before
turning off. The defogger can also be turned off
by pressing the button again or by turning off
the engine. Do not drive the vehicle until all the
windows are clear.
If your vehicle has heated outside rearview
mirrors, the mirrors will heat to help clear fog or
frost from the surface of the mirror when the
rear window defog button is pressed.
Notice:Do not use a razor blade or sharp
object to clear the inside rear window. Do not
adhere anything to the defogger grid lines
in the rear glass. These actions may damage
the rear defogger. Repairs would not be
covered by your warranty.
Outlet Adjustment
Use the slider switch in the center of the outlet,
to change the direction of the air ow. Use
the thumbwheel near the outlet to control the
amount of air ow or to shut off the air ow
completely.
Keep all outlets open whenever possible for best
system performance.
Operation Tips
Clear away any ice, snow, or leaves from the
air inlets at the base of the windshield that
can block the ow of air into the vehicle.
Use of non-GM approved hood de ectors can
adversely affect the performance of the
system.
Keep the path under all seats clear of objects
to help circulate the air inside the vehicle
more effectively.
If fogging reoccurs while in vent or bi-level
modes with mild temperature throughout
the vehicle, turn on the air conditioner
to reduce windshield fogging.
210
Page 211 of 554

Rear Air Conditioning and
Heating System
If your vehicle has this system, the rear controls
are three knobs located on the rear of the
center console. The system can be controlled from
the front controls as well as the rear controls.
To turn the system on, press the AUX button on
the front climate control system, an indicator will be
lit. Pressing the AUX button the rst time will
turn the rear system on in a mimic mode. In this
mode, the air ow in the rear will be approximately
the same direction, temperature, and fan speed
as the front. Pressing the AUX button again
will turn the rear system and the indicator off.
If the rear controls are adjusted, the system turns
on in a rear independent mode. Air ow in the
rear will then be directed according to the settings
of the rear controls. The rear system can be
turned off by pressing the AUX button on the
front climate control system and the indicator
will turn off. The system can be turned back on,
by adjusting any of the rear air conditioning
control knobs.
Fan Knob
Turn the left knob clockwise or counterclockwise
to increase or decrease the fan speed. Turn
the knob all the way counterclockwise to turn the
rear system off.
Temperature Knob
The middle knob on the control panel lets you
select the temperature of the air owing into the
passenger area. Turn the knob clockwise or
counterclockwise for warmer or cooler air.
211
Page 212 of 554