Rear Window Defogger - GMC 2009 Yukon XL Owner's Manual

The air conditioning system removes moisture from the
air, so a small amount of water might drip under the
vehicle while idling or after turning off the engine. This is
normal.
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(Recirculation): Press this button to turn the
recirculation mode on or off. An indicator light comes on
to show that recirculation is on.
This mode recirculates and helps to quickly cool the air
inside the vehicle. It can be used to help prevent
outside air and odors from entering the vehicle.
The recirculation mode cannot be used with floor,
defrost, or defogging modes. If recirculation is selected
while in one of those modes, the indicator flashes
three times and turns off. The air conditioning
compressor will also come on when this mode is
activated. While in recirculation mode the windows may
fog when the weather is cold and damp. To clear the
fog, select either the defog or defrost mode and increase
the fan speed. The recirculation mode can also be
turned off by turning off the engine.
REAR: Press to turn the rear heating and air
conditioning on. See Rear Air Conditioning and Heating
System on page 3-31 or Rear Air Conditioning and
Heating System and Electronic Climate Controls
on page 3-33 for more information.
3-24

Rear Window Defogger

The rear window defogger uses a warming grid to
remove fog from the rear window.
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(Rear Window Defogger): Press this button to turn
the rear window defogger on or off. The system
automatically turns off several minutes after it has been
activated. The defogger can also be turned off by
turning off the engine. Do not drive the vehicle until all
the windows are clear.
For vehicles with 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 anything sharp on the inside of
the rear window. If you do, you could cut or damage
the warming grid, and the repairs would not be
covered by the vehicle warranty. Do not attach a
temporary vehicle license, tape, a decal or anything
similar to the defogger grid.