Pontiac 2003 Montana Owner's Manual page 207

Directing the Airflow
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These controls are overhead, on the control panel
located behind the front seats. A rear-seat passenger
can use these controls to personally adjust the
temperature and the fan speed for the
rear-seating area.
The fan knob located on the switchbank must be turned
to R (Rear) to allow the rear-seat passengers to use
the controls located on the control panel in the
rear-seating area. If this fan knob is not in R when the
FAN or TEMP button is pressed, the rear control
panel will show DISABLED.
To direct the airflow to the rear-seating area, use the
right knob located on the main climate-control panel.
Select vent or bi-level mode to direct air to the
rear of the vehicle through the overhead outlets.
Select floor, defog or defrost mode to direct air to
the rear of the vehicle through the floor outlets.
Generally the upper outlets are used for air conditioning
and the floor outlets are used for heating.
Selecting the Fan Speed
If the driver is adjusting the fan speed, use the following
control:
%
(Fan): Turn the fan knob on the rear fan
control
located below the main climate-control system on
the switchbank to numeral 1, 2, or 3 to increase or
decrease airflow to the rear-seating area. Turn the fan
knob on the rear fan control to 0 to turn off
the fan.
l i a rear-seat passenger is adjusting the fan speed, use
the following control:
FAN: Press the FAN button on the rear control panel.
The display will show the current setting. Press the
left and right arrow buttons to cycle through the available
settings: OFF, LOW, MED and HIGH.
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