Automatic Operation - GMC 2008 Yukon Owner's Manual

Driver's Side Temperature Control
The driver's side temperature buttons are used to adjust
the temperature of the air coming through the system on
the driver's side. The temperature can be adjusted even if
the system is turned off. This is possible since outside air
will always flow through the system as the vehicle is
moving forward unless it is set to recirculation mode. See
"Recirculation" later in this section.
Press the + or − buttons to increase or decrease the
cabin temperature. The driver side temperature display
will show the temperature setting decreasing or
increasing.
Passenger's Side Temperature Control
The passenger's temperature buttons can be used to
change the temperature of the air coming through
the system on the passenger's side of the vehicle. The
temperature can be adjusted even if the system is
turned off. This is possible since outside air will always
flow through the system as the vehicle is moving
forward unless it is set to recirculation mode. See
"Recirculation" later in this section.
Press the + or − buttons to increase or decrease the
cabin temperature. The passenger side display will show
the temperature setting decreasing or increasing.
The passenger's temperature setting can be set to match
the driver's temperature setting by pressing the PASS
button and turning off the PASS indicator. When the
passenger's temperature setting is set different than the
driver's setting, the indicator on the PASS button will
illuminate and both the driver's side and passenger's side
temperature displays will be shown.

Automatic Operation

AUTO (Automatic): When automatic operation is
active the system will control the inside temperature, the
air delivery, and the fan speed.
Use the steps below to place the entire system in
automatic mode:
1. Press the AUTO button.
When AUTO is selected, the display will change to
show the current temperature(s) and AUTO will
be lit on the display. The current delivery mode and
fan speed will also be displayed for approximately
5 seconds.
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