2007 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 229

Temperature Knob The middle knob on the control panel lets you select the temperature of the air flowing into the passenger area. Turn the knob clockwise toward the red area for warmer air. Turn the knob counterclockwise toward the blue area for cooler air. 6 (Floor): This mode directs most of the air through the floor outlets, and the rest of the air is divided between the windshield defroster outlets and the side window defroster outlets. W (Defog): Airflow is delivered through the floor outlets, the windshield defroster outlets, and the side window defroster outlets. The air flow can be divided between floor and defrost depending upon where the knob is placed between the settings. Mode Knob The right knob on the control panel allows you to choose the direction of air delivery. H (Vent): This mode directs the air through the instrument panel outlets. ) (Bi-Level): This mode directs air through the floor outlets as well as the instrument panel outlets. The flow can be divided between vent and floor outlets depending upon where the knob is placed between the settings. 1 (Defrost): This setting directs most air through the windshield defroster outlets, side window defroster outlets, and some through the floor outlets. 229