1995 GMC Jimmy Owner's Manual - Page 137

Rear Window Defogger (Option) If your vehicle has this option, the rear window will havelines running across the glass. Theselines heat your 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 switch marked REAR DEFOG on your instrument panel below the headlight switch. Press ON until the light in the switch comes on, then release it. The rear window defogger will stay on for 5 - 7 minutes, then turn off. It will only work if the ignition switch is turnedto RUN. You can turn thedefogger off at any time bypressing OFF. The defogger will shut itself off after several minutes so that the glassdoes not get too hot. If the window still isn't clear, turn the defogger on again. I NOTICE: Scraping the inside your rear window could cut and damage of the defogger.Your warranty would not coverthis damage. Don't put decals there, either. might have to scrape them You off. 3-3