2003 Pontiac Bonneville Owner's Manual - Page 142

@ FRONT (Defrost): Pressing this button directs most of the air to windshield and the outboard outlets the (for the side windows), with some air directed to the floor outlets. When you select this mode, the system turns off recirculation and runs the air conditioning compressor unless the outside temperature is at or below freezing. The recirculation mode cannot be selected while in the FRONT defrost mode. minutes before turning off. If you maintain a speed above 30 mph (48 km/h), the rear defogger will not turn off automatically to help keep the rear glass clear. The defogger can also be turned off by pressing the button again or by turning off the engine. if your vehicle has outside heated mirrors, the mirrors will heat to help clear fog or frost from the surface of the mirror when the rear window defogger button is pressed. Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window. REAR: Press this button to turn the rear window defogger on or off. Be sure to clear as much snow from the rear window as possible. The rear window defogger will turn off approximately 10 minutes after the buttonis pressed. If turned on again, the defogger will only run for approximately five ISH] 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 defogger and the repairs would not be covered by your warranty. Do not attach a temporary vehicie iicense, tape, a decal or anything similar to the defogger grid. 3-27