2008 Buick Lucerne Owner's Manual - Page 165

: (Outside Air): This mode lets outside air enter the vehicle. When the button is pressed, an indicator light turns on. Pressing the recirculation button cancels this mode. ? (Recirculation): Press this button to recirculate cabin air through the vehicle. An indicator light below the button comes on to show that this mode is activated. This mode can be used to prevent outside air and odors from entering the vehicle or to help cool the air inside the vehicle more quickly. This mode cannot be selected while in the defog or defrost modes. If you try to select the recirculation mode, the indicator light flashes three times and turns off. Operation in this mode during periods of high humidity and cool outside temperatures may result in increased window fogging. If window fogging is experienced, select the defrost mode. wx (Driver Temperature Controls): Press these buttons next to the fan control to manually increase or decrease the temperature inside the vehicle. wx (Passenger Temperature Controls): Press these buttons next to the mode control to manually increase or decrease the temperature for the front passenger. If the passenger climate control system is off, pressing one of these buttons turns it on. PASS (Passenger Climate Control): Press this button to turn the passenger climate control systems on or off. When the passenger climate control system is on, the passenger temperature setting is displayed. If the PASS button is pressed to turn the passenger temperature setting off, the driver temperature setting controls the temperature for the entire vehicle. 3-27