GMC 2011 Sierra Denali Owner's Manual page 248

8-2 Climate Controls
(On/Off): Press to turn the
climate control system on or off.
Outside air still enters the vehicle,
and is directed to the floor.
This direction can be changed
by pressing the mode button.
Recirculation can be selected once
you have selected vent or bi-level
mode. The temperature can also be
adjusted using either temperature
button. If the air delivery mode or
temperature settings are adjusted
with the system off, the display
illuminates briefly to show the
settings and then returns to off.
The system can be turned back on
by pressing either , , ,
the defrost or the AUTO button.
Driver and Passenger Side
Temperature Controls
The driver and passenger side
temperature buttons are used to
adjust the temperature of the air
coming through the system on the
driver or passenger side of the
vehicle. The temperature can be
adjusted even if the system is
turned off. This is possible since
outside air always flows 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
or decrease the cabin temperature.
The driver side or passenger side
temperature display shows the
temperature setting increasing or
decreasing.
The passengers 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
passengers temperature setting is
set different than the drivers setting,
the indicator on the PASS button
illuminates and both the driver side
and passenger side temperature
displays are shown.
When in defrost mode the
passenger temperature setting
cannot be changed.
Automatic Operation
AUTO (Automatic): When
automatic operation is active,
the system controls the inside
temperature, the air delivery, and
the fan speed.
Use the steps below to place the
buttons to increase
entire system in automatic mode:
1. Press the AUTO button.
When AUTO is selected, the
display changes to show the
current temperature(s) and
AUTO is lit on the display.
The current air delivery mode
and fan speed are also
displayed for about five seconds.
When AUTO is selected, the air
conditioning operation and air
inlet are automatically controlled.
The air conditioning compressor
may run when the outside
temperature is above freezing.
The air inlet will normally be set
to outside air. If it is hot outside,
the air inlet may automatically
switch to the recirculate mode to