Pontiac 1999 Firebird - Manual (Page 150)

yellow blue
3-4
Ventilation
For mild outside temperatures when little heating or
cooling is needed, you can still direct outside air through
your vehicle.
1. Turn the air control knob to vent.
2. Turn the temperature control knob to a
comfortable setting.
3. Turn the fan control knob to the desired speed.
Defogging and Defrosting
1. Turn the air control knob to defrost.
2. Turn the temperature control knob to the
desired setting.
3. Turn the fan control knob to the desired speed.
The side window defogging works equally as well in the
heater, blend and defrost modes.
Rear Window Defogger
The rear window defogger
uses a warming grid to
remove fog from the
rear window.
Press the button to turn on the defogger. An indicator
light will come on to remind you that the defogger is on.
The defogger will turn off automatically after about 10
minutes of use. If you turn it on again, the defogger will
operate for about five minutes only. You can turn the
defogger off by pressing the button again. The indicator
light will go off when the system is turned off.
Do not attach anything like a temporary vehicle license
or a decal across the defogger grid on the rear window.