GMC 2005 Sierra 1500 Pickup, Owner'S Manual, Page: 188 / 574

6
(Floor): This setting directs most of the air through
the floor outlets, and the rest of the air is divided
between the windshield defroster outlets and the side
window defroster outlets.
W
(Defog): Airflow is delivered through the floor
outlets, the windshield defroster outlets and the side
window defroster outlets. The air flow can be divided
between floor and defrost depending upon where
the knob is placed between the settings.
1
(Defrost): This setting directs most air through the
windshield defroster outlets, side window defroster
outlets and some through the floor outlets.
Dual Climate Control System
With this system you can control the heating, cooling
and ventilation for your vehicle.
9
(Fan): Turn the left knob clockwise or
counterclockwise to increase or decrease the fan speed.
Turn the knob to the off position to turn off the fan. If
the knob is in off, outside air will still enter the vehicle
and will be directed based on the position of the
mode knob. The temperature can also be adjusted
using the temperature levers.
Turn the right knob clockwise or counterclockwise to
direct the airflow inside of your vehicle.
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