1997 GMC Suburban Owner's Manual - Page 329

FRT FRT I Rust or dirt on wheel, or on the parts to a which it is fastened, can make wheel nuts become loose after a time. The wheel could comeoff and cause an accident. When you change a wheel, remove any rust or dirt from places where the wheel attaches to thevehicle. In an emergency, you can use a cloth or a papertowel to do this; but be sure to use a scraper or wire brush later, if you all off. need to, to get the rust or dirt (See "Changing a Flat Tire" in the Index.) When rotating your tires, always use one of the correct rotation patterns shown here. the After the tires have been rotated, adjust front and rear inflation pressures as shown on theCertificatioflire label. Make certain that all wheel nuts are properly tightened. See "Wheel Nut Torque'' in the Index. 6-47