Climate Control System (Heater Only) - GMC Sierra 2008 Owner's Manual

Climate Control System
(Heater Only)
With this system you can control the heating and
ventilation for your vehicle.
Operation
9
(Fan): Turn the left knob clockwise or
counterclockwise to increase or decrease the fan speed.
Turn the knob all the way counterclockwise to turn the
front system off.
Temperature Control: Turn the center knob clockwise
or counterclockwise to increase or decrease the
temperature inside the vehicle.
Use the right knob to select from the following modes:
The right knob can be positioned between two modes to
select a combination of those two modes.
H
(Vent): This mode directs air to the instrument
panel outlets.
)
(Bi-Level): This mode directs half of the air to the
instrument panel outlets and to the floor outlets.
6
(Floor): This mode directs most of the air to the
floor outlets with some air directed to the windshield,
side window outlets, and second row floor outlets. In this
mode, the system will automatically select outside air.
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