1998 Chevrolet Blazer Owner's Manual - Page 161

Rear Window Defogger (If Equipped) - If your vehicle has this option, the rear window will have lines that warm the glass. The rear window defogger will stay for five to seven on minutes, then turnoff. If you need additional warming time, turn it on again. You can turn the defogger at off any timeby pressing the button. Do not attach a temporary vehicle license, tape or decals across the defogger grid on the rear window. NOTICE: Don't use a razor blade something else sharp or of on the inside the rear window.If you do, you could cut or damage the warming grid, and the repairs wouldn't be covered by your warranty. For I - - t results, clear the window ofas much snow or ice as possible before using the rear window defogger. To turn on the rear window defogger, find the switch marked REAR with the defog symbol on the lower right corner of your climate control system. Press the button until the light in the switchcomes on, then release it. It will only work if the ignition switch is turned RUN. to If your vehicle is equipped with the optional heated outside rearview mirrors, therear window defogger button will activate the rear window defogger and the heated outside rearviewmirrors. 3-9