2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 208

8-2 Climate Controls Temperature Control: Turn the knob clockwise or counterclockwise to increase or decrease the temperature inside the vehicle. Air Delivery Mode Control: Turn the knob clockwise or counterclockwise to change the current airflow mode. 6 (Floor): Air is directed to the floor outlets with some air directed to the windshield and side windows. H (Vent): Air is directed to the instrument panel outlets. ) (Bi-Level): Air is divided between the instrument panel and floor outlets, with some air directed toward the windshield. - (Defog): This mode clears the windows of fog or moisture. Outside air is directed to the floor and defroster outlets. Adjust the temperature knob for warmer or cooler air. The air conditioning compressor might turn on in this setting to dehumidify the air. 1 (Defrost): This mode clears the windshield of fog or frost more quickly. Air is directed to the windshield, with some to the floor outlets and front side windows. The air conditioning compressor might turn on in this setting to dehumidify the air. Do not drive the vehicle until all the windows are clear.