GMC YUKON 2017 Owner's Manual page 194

Changing the mode cancels the
automatic operation of the mode.
Press AUTO to return to automatic
operation.
: Air is directed to the instrument
panel outlets.
: Air is divided between the
instrument panel and floor outlets.
: Air is directed to the floor
outlets, with some to the windshield,
side window outlets, and second
row floor outlets.
-
: This mode clears the windows
of fog or moisture. Air is directed to
the windshield, floor outlets, and
side window vents.
0
: Press to clear the windshield
of fog or frost more quickly. Air is
directed to the windshield and the
side window vents. The system
automatically forces outside air into
the vehicle and the air conditioning
compressor will run, unless the
outside temperature is close to
freezing.
Do not drive the vehicle until all
windows are clear.
See Air Vents 0 196.
A/C : Press to turn the air
conditioning system on or off. An
indicator light comes on to show
that the air conditioning is enabled.
If the fan is turned off, the air
conditioner will not run. The A/C
light will stay on even if the outside
temperatures are below freezing.
@
: Press to turn on recirculation.
An indicator light comes on. Air is
recirculated to quickly cool the
inside of the vehicle. It can also be
used to help reduce outside air and
odors that enter the vehicle. The air
conditioning compressor also comes
on when this mode is activated.
Auto Defog : The climate control
system uses a sensor to
automatically detect high humidity
inside the vehicle. When high
humidity is detected, the climate
control system may adjust to
outside air supply, turn on the air
conditioner, and direct more air to
the windshield. If the climate control
system does not detect possible
window fogging, it returns to normal
operation. To turn Auto Defog off or
Climate Controls
on, see Climate and Air Quality
under Vehicle
Personalization 0 170.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
: Press to turn the rear window
defogger on or off. An indicator light
on the button comes on to show that
the rear window defogger is on.
The rear window defogger only
works when the ignition is in on. The
defogger turns off if the ignition is
turned to ACC/ACCESSORY or
LOCK/OFF.
The rear window defogger can be
set to automatic operation. When
Auto Rear Defog is selected, the
rear window defogger turns on
automatically when the vehicle is
first started in cold weather and
turns off when the vehicle is
warmed. To turn Auto Rear Defog
on or off, see Climate and Air
Quality under Vehicle
Personalization 0 170.
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