Oldsmobile 2003 Silhouette Owner's Manual page 191

Rear Air Outlets
To increase airflow through the rear floor outlets, place
the left bucket seat in the second row in the forward
position. For more information, see "Seats" in the Index.
The outlet behind the left rear seat is the cold air
return outlet. Be sure to keep it free from obstructions.
Also, keep the area around the base of the center
instrument panel console, between and under the front
seats, free of objects that could also obstruct airflow
to the rear-seating area.
For more information on how to use the main climate
control system, see "Climate Controls" listed previously
in this section. For information on ventilation, see
"Outlet Adjustment" also listed previously in this section.
Rear Climate Control System
(With Entertainment System)
Your vehicle may have a rear climate-control system
that allows the driver to adjust the fan speed or a
rear-seat passenger to set a separate temperature
and adjust the fan speed, for the rear-seating area.
This system works with the main climate-control system
in your vehicle.
This knob is located below
the main climate-control
system on the instrument
panel switchbank. Use
this knob to adjust the fan
speed for the rear-seat
passengers, from the
front-seating area.
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