Buick LaCrosse Owner's Manual page 21

A. Power
B. Driver Temperature Control
C. Defrost
D. Fan Control
E. Air Delivery Mode Control
F. Recirculation/Automatic
Recirculation
G. Passenger Temperature Control
H. AUTO (Automatic Operation)
I. Rear Window Defogger
J. Heated Steering Wheel
K. Air Conditioning
L. ZONE