2003 Chevrolet Impala Owner's Manual - Page 145

Climate Controls Dual Climate Control System With this system you can control the heating, cooling and ventilation for your vehicle. (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 to the windshield. (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 is directed to the windshield. The right knob can also be used to select defog or defrost mode. For more information, see "Defogging and Defrosting" later in this section. +2 @ (Fan): Turn the left knob clockwise or counterclockwise to increase or decrease the fan speed. If theairflow seems low when fan is at the highest the setting, the passenger compartment filter, if equipped, air may needto be replaced. For more information, see Passenger Compartment Air Filter on page and Part 3-26 A: Scheduled Maintenance Services on page 6-4. Manual Operation Turn the right knob clockwise or counterclockwise to direct the airflow inside of your vehicle. To change the current mode, select one of the following: 2 (Vent): This mode directs air to the instrument panel outlets. Press this button to turn the outside air mode on. When this mode is on, outside air will circulate throughout your vehicle. When the button is pressed, an indicator light in the button will come on to let you know that it is activated. You may have to set the instrument panel brightness control to the highest setting during the day to see the indicator light. The outside air mode can be used with all modes, but it cannot be used with the recirculation mode. a (Outside Air): 3-22