2001 Chevrolet Blazer Owner's Manual - Page 176

Rear Window Defogger (If Equipped) If your vehicle has this option, the rear window will have lines that warm the glass. Pressing the REAR button on your climate control system will also activate your heated outside mirrors (if equipped). This will help to keep ice and snow from collecting on your mirror surfaces. The rear window defogger will stay on for five to seven minutes, then turn off. If you need additional warming time, turn it on again. You can turn the defogger off at any time by pressing the button. Do not attach a temporary vehicle license, tape or decals across the defogger grid on the rear window. For best results, clear the window of as much snow or ice as possible before using the rear window defogger. To turn on the rear window defogger, find the button marked REAR with the defog symbol on the lower right corner of your climate control system. Press the button until the light in the button comes on, then release it. It will only work if the ignition switch is turned to RUN. 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 warming grid, and the repairs wouldn't be covered by your warranty. 3-8