2003 Chevrolet Express Van Owner's Manual - Page 140

Climate Controls Climate Control System With this system you can control the heating, cooling and ventilation for your vehicle. To change the current mode, select one of the following: (Vent): This mode directs air to the instrument panel outlets. 2 +2(Bi-Level): This mode directs approximately half of the air to the instrument panel outlets, then directs most of the remaining air to the floor outlets. Some air may be directed toward the windshield. ;4 (Floor): This mode directs most of the air to the floor outlets with some air directed to the outboard outlets (for the side windows) and some air directed to the windshield. The right knob can also be used to select the defrost mode. Information on defogging and defrosting can be found later in this section. Turn the right knob clockwise or counterclockwise to direct the airflow inside of your vehicle. @ (Fan): Turn the left knob clockwise or counterclockwise to increase or decrease the fan speed 3-17