![background image](/i/gmc/153257/gmc-sierra-2500hd-2015-um/h/gmc-sierra-2500hd-2015-um-009.png)
9
a
utomatIc
c
lImate
c
ontrols
F
Automatic Operation
1. Press
AUTO
.
2. Set the temperature for the driver and front passenger. The system automatically
controls the fan speed, air delivery, air conditioning and recirculation to reach the set
temperature. Allow time for the system to reach the desired temperature.
If the air delivery mode or fan speed is manually adjusted, automatic operation is turned off.
Recirculation
Press
Recirculation Mode to quickly cool the air inside the vehicle or prevent
outside odors from entering the vehicle.
Note: When the Recirculation Mode is used without air conditioning, the air humidity increases and
the windows may fog.
Sync Temperature Settings
Press
SYNC
to link the passenger’s temperature setting to the driver’s setting. When the
passenger’s setting is adjusted, the different passenger’s temperature setting is displayed.
See Climate Controls in your Owner Manual.
Driver’s
Temperature
Control
Defog
Mode
Defrost
Mode
Passenger’s
Temperature
Control
Fan Speed
Control/On/Off
Vent
Mode
A/C
Air
Conditioning
Control
F
Optional equipment
AUTO
Automatic
Operation
Driver’s
Heated/
Cooled Seat
Buttons
F
Passenger’s
Heated/
Cooled Seat
Buttons
F
Recirculation
Mode
Floor
Mode
SYNC
Link passenger’s
temperature
setting to
driver’s
temperature
setting
Bi-level
Mode
REAR
Rear
Window/
Outside
Mirror
Defogger
F