Oldsmobile 1999 Silhouette - Manual (Page 206)

yellow blue
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Rear Fan Control
This option comes with the rear climate controls.
Keep the area around the base of the center instrument
panel console and the area between and under the front
seats free of objects that would obstruct airflow to the
rear of the vehicle.
The rear fan control is
located below the climate
control system, in
the switchbank.
Turn the fan to the desired setting for the amount of air
to be directed to the rear of the vehicle. The temperature
of the air will be the same as the air in the front of the
vehicle. The rear fan control in the instrument panel
switchbank has an R setting which allows the rear
passengers to use the rear climate control knobs to
adjust the air through the rear air outlets.
Rear Comfort Controls
The rear climate control knobs are in the panel located
above the driver’s seat.
Turn the temperature knob counterclockwise (to the blue
area) for cooler air, or clockwise (to the red area) for
warmer air.