2003 Chevrolet Avalanche Owner's Manual - Page 182

4# (Mode): Press this button to manually change the direction of the airflow in your vehicle; keep pressing the button until the desired mode appears on the display. % if you press the mode button select an air delivery to mode, the display will change to show you the selected air mode delivery. The display willthen show the current status of the system. When the system is turned off, the display will go blank after displaying the current status of the system. (Recirculation): Press this button to limit the amount of outside air entering your vehicle. The light on the recirculation button will glow. This is helpful when you are trying to limit odors entering your vehicle and for maximum air Conditioning performance in hot weather. Press this button again to allow outside air to enter the vehicle. The light on the recirculation button will go off. Pressing this button cancels the auto recirculation feature. To resume the auto recirculation function, press the AUTO button. Each time the vehicle is started, the system will revert to the auto recirculation function. (Panel): This setting will deliver air to the instrument panel outlets. will deliver warmer air to the floor and cooler air to the instrument panel outlets. (Floor): This setting will deliver air to the floor outlets. 2 +2 (Bi-Level): This setting If you select recirculation while in defrost, defog or floor, the light on the button will flash and go out to let you know this is not allowed. This is to prevent fogging. When the weather is cool or damp, operating the system in recirculation for extended periods of time may cause fogging of the vehicle's windows. To clear the fog, select either defog or front defrost. Be sure A/C off is not selected. You will want to allow the air conditioning to run automatically to help dehumidify the air. +3(Defog): See "Defogging this section. and Defrosting" later in 3-23