GMC 2010 Yukon/Yukon XL Owner's Manual page 242

The rear window defogger uses a warming grid to
remove fog from the rear window.
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.
The heating, cooling, and ventilation in the vehicle can
be controlled with this system. The vehicle also has a
flow-through ventilation system described later in this
section.
4-20
Press this button to
If this vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
A. Fan Control
B. AUTO
C. Defrost
D. Recirculation
E. REAR
F. Air Delivery Mode
Control
G. Driver Temperature
Control
H. Display
I. Power Button
J. Rear Window Defogger
K. Air Conditioning
L. PASS
M. Passenger Temperature
Control