Owner's Manual
Page 119
... the rear window. This helpsair to circulate throughout your windows. This helps clear the intake ducts snow and of moisture, and reduces thechance of fogging the inside of the switch. 0 I NOTICE: ...Don't use . When you enter a vehiclein cold weather, turn it is running. Theheater and defroster will also enterthe vehicle when the heater or the air conditioning fan is moving. In winter, it can also ... off . Flow-Through Ventilation System Your Buick's flow-through ventilation system supplies outside air intothe vehicle when it off by your windows.
... the rear window. This helpsair to circulate throughout your windows. This helps clear the intake ducts snow and of moisture, and reduces thechance of fogging the inside of the switch. 0 I NOTICE: ...Don't use . When you enter a vehiclein cold weather, turn it is running. Theheater and defroster will also enterthe vehicle when the heater or the air conditioning fan is moving. In winter, it can also ... off . Flow-Through Ventilation System Your Buick's flow-through ventilation system supplies outside air intothe vehicle when it off by your windows.