1994 GMC Suburban Owner's Manual - Page 320

Glass Glass should be cleaned often. GM Glass Cleaner (GM Part No. 1050427) or aliquid household glass cleanerwill remove normal tobacco smoke and dust films. Don't use abrasive cleaners on glass, because they may cause scratches. Avoid placing decals on the inside rear window, since they may have to be scraped off later. Ifabrasive cleaners are used on the inside of the rear window, an electric defoggerelement may be damaged. Any temporary license should not be attached across the defogger grid. Cleaning the Outside the Windshield, of Backglass and Wiper Blades If the windshield is not clear afterusing the windshield washer, or if the wiper blade chatters when running, wax or othermaterial may be on the blade orwindshield. Clean the outside of the windshield with GM Windshield Cleaner, Bon-Ami Powder@ (GM Part No. 1050011). The windshield is clean if beads do not form when you rinse it with water. Clean the blade by wiping vigorously with a cloth soaked in full strength windshield washer solvent. Then rinse the blade with water. Wiper blades should be checked on a regular basis and replaced when worn. Cleaning the Outside Your Vehicle of The paint finish on your vehicle provides beauty, depth of color, gloss retention and durability. Washing Your Vehicle The best way to preserve your vehicle's finish is to keep it clean by washing it often with lukewarm or cold water. Don't wash your vehicle in the direct rays of the sun. Don't use strong soaps or chemical detergents. Use liquid hand, dish or car washing (mild detergent) soaps. Don't use cleaning agents that contain acid or abrasives. All cleaning agents should be flushed promptly and not allowed to dry on the surface, orthey could stain.Dry the finish with a soft, clean chamois or a 100%cotton towel to avoid surfixe scratches and water spotting. High pressure vehicle washes may cause water to enter your vehicle. 6-74