2001 Buick Regal Owner's Manual - Page 160

Rear Window Defogger NOTICE: Do not attach anything like a temporary vehicle license or decal across the defogger grid. NOTICE: Dual ComforTemp Climate Control t Dual Automatic ComforTemp Climate Control t Don't use a razor blade or anything 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. The rear window defogger uses a warming grid to remove fog from the rear window. Press the button to turn the rear defogger on. It will turn itself off after about 15 minutes. If you turn it on again, the rear defogger will only run for about 7.5 minutes before turning off. You can also turn it off by pressing the button again. 3-9