Pontiac 2002 Montana Owner's Manual page 234

Do not attach a temporary vehicle license across the
defogger grid on the rear window.
NOTICE:
Don't use a razor blade or something else sharp
on the inside of the rear window. If you do, you
could cut or damage the warming grid, and the
repairs wouldn't be covered by your warranty.
Rear Climate Control (Vehicles without the
Entertainment System) (Option)
If you have the optional rear climate control, the rear
seat passengers can control the temperature and the
amount of air directed to the rear of the vehicle. You can
also adjust the amount of air directed to the rear of the
vehicle using the front fan knob.
When it's cold outside, set the main climate control
mode knob to floor, defog or defrost to send air to the
rear of the vehicle through the floor ducts.
Set the main climate control mode knob to vent or
-
bi level to send air to the rear of the vehicle through the
headliner outlets.
3-6
To send conditioned air to the rear of the vehicle, press
the A/C button on the main climate controls. If you do
not select A/C, air directed to the rear of the vehicle will
be cabin temperature.
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.