1997 Pontiac Grand Prix Owner's Manual - Page 169
1997 Pontiac Grand Prix Manual
Page 169 highlights
Ventilation Tips Keep the hood and front air inlet free ice, snow or of any other obstruction, such as leaves. The heater and defroster will work far better, reducing the chance of fogging the inside of your windows. When you enter a vehicle in coldweather, adjust the mode knob to FLOOR and the fanto the highest speed for a few seconds before drivingoff. This helps clear the intake ductsof snow and moisture and reduces the chance of fogging the inside of your windows. Keep the air path under the front seats clear of objects. This helps air to circulate throughout your vehicle. If you turn it onagain, the reardefogger will only run for about five minutes before turning off. You can also turn it off by pressing the button again. Do not attach anything like a temporary vehicle license or decalacross the defogger grid. Rear Window Defogger Your comfort control system has a button to operate your rear window defogger. The electronic comfort control system has a button marked REAR. The system with automatic temperature control has a button marked R.DEF. The rear window defogger uses a warming grid to K ~ ~ O W fog from the rear window. Press the button to turnthe rear defogger on. It will turn itself off after about ten minutes. NOTICE: Don't use a razor blade or anything else sharp on the insideof the rear window. you do, you If could cut or damage the warming grid, and the repairs wouldn't be covered by your warranty. 3-9