Buick RIVIERA 1993 Manual page 120

your Bui& Comfort Control System
Your Buick has.an Electronic Touch Climate Control,
This
part
tells
you
how to make
your
air system work
:for you.
Fresh air from outside your vehicle flows through you
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.
here's how' your system looks:
Air Outlets
Adjust the direction of air flow by moving the louvered
vents.