GMC C series 2002 Owner's Manual page 125

Left Blend Button
The airflow can be blended between the two positions.
To blend between the positions, press the side of the
button showing the area where you would like more
airflow. The system will automatically begin to blend
toward the position chosen. To stop the system between
positions, just press the same side of the button again.
(Vent): Press the top of the button and all of the
airflow will come through the instrument panel vents.
(Floor): This setting sends most of the airflow
through the floor outlets. The rest of the air flows
through the windshield and side window vents.
Right Blend Button
The airflow can be blended between the two positions.
To blend between positions, press the side of the button
showing the area where you would like more airflow.
The system will automatically begin to blend toward the
position chosen. To stop the system between positions,
just press the same side of the button again.
(Defog): This setting operates the defogger.
Air comes out near the bottom of the windshield and
at your front side windows.
3-4
(Floor): This setting sends most of the airflow
through the floor outlets. The rest of the air flows
through the windshield and side window vents.
A/C (Air Conditioning): Press the A/C button to turn
your air conditioner on and off. The A/C symbol will
light on your display, and air will come out of your
instrument panel vents. The fan will automatically be set
on LOW.
MAX (Maximum): If you press the MAX button, the
air in your vehicle will be recirculated. With the air
conditioner on, MAX will give you maximum cooling.
It can also be used in all modes to help keep dust out of
your vehicle. When MAX is selected, REC (recirculate)
will light on the display.
Fan Control Button
This button is in the upper passenger's side corner of
your system control panel. The fan has four settings:
low, medium, high and off. Press the top of the button
with the plus symbol to increase airflow. Press the
bottom of the button with the minus symbol to decrease
airflow. The setting you select is shown on your display
as LOW, MED, HI or OFF.