Buick LaCrosse Owner's Manual page 195

Dual Automatic Climate Control
System . . . . . . . . . . . . . . . . . . . . . . 8-1
Air Vents . . . . . . . . . . . . . . . . . . . . . . 8-6
Air Intake . . . . . . . . . . . . . . . . . . . . . 8-7
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
Service . . . . . . . . . . . . . . . . . . . . . . . 8-7
For vehicles with this system, it controls the heating, cooling, and ventilation.
1. Power
2. Driver Temperature Control
3. Defrost
4. Fan Control
5. Air Delivery Mode Control
6. Recirculation/Automatic
Recirculation
7. Passenger Temperature Control
8. AUTO (Automatic Operation)
9. Rear Window Defogger
10. Heated Steering Wheel
11. Air Conditioning
12. ZONE