2007 Chevrolet Avalanche Owner's Manual - Page 233

Pressing one of these buttons when the system is off will turn the system on. Pressing one of these buttons when in automatic control will place the fan under manual control. The fan setting will remain displayed and the AUTO light will turn off. The air delivery mode will remain under automatic control. ) (Bi-Level): This mode directs half of the air to the instrument panel outlets and to the floor outlets. The flow can be divided between vent and floor outlets depending upon where the knob is placed between the settings. A little air is directed towards the windshield and side window outlets. Cooler air is directed to the upper outlets and warmer air to the floor outlets. yN z (Mode): Press the mode up and down buttons to manually change the direction of the airflow in your vehicle. Repeatedly press the button until the desired mode appears on the display. Pressing one of these buttons when the system is off will change air delivery mode without turning the system on. Pressing one of these buttons when in automatic control will place the mode under manual control. The air delivery mode setting will be displayed and the AUTO light will turn off. The fan will remain under automatic control. 6 (Floor): This mode directs most of the air to the floor outlets, with some of the air directed to the windshield, side window outlets, and second row floor outlets. In this mode, the system will automatically select outside air. - (Defog): See "Defogging and Defrosting" later in this section. @ (Recirculation): Press this button to turn the recirculation mode on. When the button is pressed, an indicator light will come on. This mode keeps outside air from entering the vehicle. It can be used to reduce outside air and prevent odors from entering your vehicle. Recirculation may also help cool the air inside your vehicle more quickly once the temperature inside the vehicle is less than the outside temperature. 233 H (Vent): This setting will deliver air to the instrument panel outlets.