2003 GMC Sierra 1500 Pickup Owner's Manual - Page 182

Manual Operation To change the current setting, select one of the following: an): This button allows you to manually adjust the fan speed. Press the up arrow to increase fan speed and the down arrow to decrease fan speed. 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 to select an air delivery mode, the display will change to show you the selected air mode delivery. The display will then 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. (Vent): This mode directs air to the instrument panel vents. (Bi-Level): This mode directs half of the air to the instrument panel vents, then directs the remaining air to the floor vents. A little air is directed toward the windshield and the side window vents. Cooler air is directed to the upper vents and warmer air to the floor vents. 9 . A @ V' (Floor): This mode directs most of the air to the floor vents. Some air also comes out of the defroster and side window vents. Use this mode to send air to the rear of the vehicle. Keep the area under the front seats free of objects that could obstruct airflow to the rear of the vehicle. The recirculation button cannot be selected in the floor mode. & (Recirculation): Press this button to turn the i recirculation mode on or off. The recirculation mode is 13 (Mode): used to limit the amount of outside air entering your vehicle. This is helpful when you are trying to prevent outside odors and/or dust from entering your vehicle, or to help cool the air inside of your vehicle more quickly. When this mode is on, inside air will recirculate throughout your vehicle. When this button is pressed, an indicator light in the button will also come on to let you know that it is activated. 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 windshield fogging. f;' +2 If the weather is cold and damp, the system may cause the windows to fog while using the recirculation mode. If the windows do start to fog, select defog or front defrost mode. 3-27