Buick 1994 LeSabre Owner's Manual page 122

Your Buick Comfort Control System
This part tells you how to make your air system work
for you. Your Comfort Control System uses the new
ozone friendly R 134A refrigerant.
Fresh air from outside your vehicle flows through your
Buick when the car is moving. When the vehicle is not
moving, you can get outside air to flow through by
selecting any air choice (except the rear window
defogger) and the HI fan speed.
Air Outlets
Adjust the direction of air
flow by moving the
louvered vents.