Temperature Knob; Fan Knob - GMC 2008 Yukon Owner's Manual

If the rear controls are adjusted, the system will enter a
rear independent mode. Airflow in the rear will then
be directed according to the settings of 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.

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.
3-34

Temperature Knob

The middle knob on the control panel lets you select the
temperature of the air flowing into the passenger
area. Turn the knob clockwise toward the red area for
warmer air. Turn the knob counterclockwise toward
the blue area for cooler air.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
H
(Vent): This setting directs the air through the
headliner outlets.
)
(Bi-Level): Air is delivered through the floor outlets
as well as the headliner outlets. The rear system floor
outlets are located directly behind the second row seats.
The flow can be divided between vent and floor outlets
depending upon where the knob is placed between
the settings.
6
(Floor): This setting directs most of the air through
the floor outlets. The rear system floor outlets are
located directly behind the second row seats.