1996 GMC Savana Van Owner's Manual - Page 124

Ventilation Tips 0 Rear Window Defogger (Option) Keep the hood and front airinlet free of ice, snow, or any other obstruction (such as leaves). The heater and defroster will work far better, reducing the chance of fogging theinside of your windows. When you enter a vehicle in cold weather, turn the blower fan to HI for a few moments before driving off. This helps clear the intake ducts of snow and moisture, and reduces the chance of fogging the inside of your windows. Keep the air path under the front seats clear of objects. This helps air tocirculate throughout your vehicle. You can tell if your vehicle has this option by looking at the rear window. There will be lines across the glass. These are the wire-like elements which heat your window. 0 NOTICE: Scraping the inside your rear window could of cut and damage the defogger.Your warranty would not cover this damage. Don't put decals off. there; you might have to scrape them Your vehicle has air vents in the center and on the sides of your instrument panel. You can move the vents from side to side or up and down to direct the flow of air, or closethe vents altogether. When you close a vent, it will increase the flow of air coming out of any vents that are open. 3-8