GMC Sierra 2015 Owner's Manual page 259

8-2 Climate Controls
9
(Fan Control): Turn clockwise
or counterclockwise to increase or
decrease the fan speed. Turn the
knob all the way counterclockwise
to turn the fan off.
Air Delivery Mode Control:
-
Press , , , or
the direction of the airflow. An
indicator light comes on in the
selected mode button.
(Vent): Air is directed to the
instrument panel outlets.
(Bi-Level): Air is divided
between the instrument panel and
floor outlets.
(Floor): Air is directed to the
floor outlets, with some air directed
to the windshield, side window, and
second row floor outlets.
-
(Defog): This mode clears the
windows of fog or moisture. Air is
directed to the windshield, floor
to change
outlets, and side window vents.
0
(Defrost): Press to clear the
windshield of fog or frost more
quickly. Air is directed to the
windshield and the side window
vents. The system automatically
forces outside air into the vehicle.
Do not drive the vehicle until all the
windows are clear.
See Air Vents on page 8-8.
@
(Recirculation): Press to turn
on recirculation. An indicator light
comes on. Air is recirculated to
quickly cool the inside of the
vehicle. It can also be used to help
reduce outside air and odors that
enter the vehicle.