GMC 2015 Sierra Owner's Manual page 256

Climate Control Systems (with Air Conditioning)
With this system the heating, cooling, and ventilation can be controlled.
1. Fan Control
2. A/C (Air Conditioning)
3. Air Delivery Mode Control
4. Defrost
5. TEMP (Temperature Control)
6. Air Recirculation
7. Rear Window Defogger
(If Equipped)
Outside Heated Mirror
(If Equipped)
Outside Air (If Equipped)
Climate Controls
TEMP (Temperature Control):
Turn clockwise or counterclockwise
to increase or decrease the
temperature inside the vehicle.
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 and side window
outlets.
8-3
to change