GMC 2007 Yukon XL Owner's Manual page 223

Automatic Operation
AUTO: Press the mode button until this setting is
selected to control the inside temperature, the
air delivery, and the fan speed. AUTO will
illuminate in the display when automatic operation
is active.
+/ (Increase/Decrease Temperature): Press the
+ or buttons to increase or decrease the cabin
temperature. The rear control temperature
display will show the temperature setting
decreasing or increasing.
The display will only indicate climate control
functions when the system is in rear
independent mode.
Manual Operation
y9 z
(Fan): The fan buttons on the rear seat
audio control panel allows you to manually
adjust the fan speed. To decrease airflow, press
the button with the fan and down arrow symbol.
Pressing the fan up button when the system is off
will turn the system on. The air delivery mode
will remain under automatic control. To turn
the rear system off, keep pressing the button with
the fan and down arrow symbol.
+/ (Increase/Decrease Temperature): These
buttons select the temperature of the air flowing into
the passenger area. Press the + button for warmer
air and press the button for cooler air.
N
(Mode): Press the mode button to manually
change the direction of the airflow in your vehicle.
Repeatedly press the button until the desired
mode appears on the display. Multiple presses will
cycle through the delivery selections.
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