2008 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 203

Climate Controls Climate Control System (With Air Conditioning ) With this system you can control the heating, cooling, and ventilation for your vehicle. 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 half to the floor outlets. 6 (Floor): This mode directs most of the air to the floor outlets with some air directed to the windshield and side window outlets. In this mode, the system will automatically select outside air. Recirculation cannot be selected in floor mode. 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. The right knob may also be used to select the defrost and defog mode. For more information, see "Defogging and Defrosting" later in this section. 3-25