1998 Chevrolet Express Van Owner's Manual - Page 283

A CAUTION: Rust or dirt onwheel, 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. Whenyou change a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In anemergency, you can use a clothor a paper towel to dothis; but be sure to use a scraper or wire brush iflater, you off. need to, to get all the rust or dirt (See "Changing a Flat Tire" in the Index.) If your vehicle has dual rear wheels, always use of one the correct rotation patterns shown here when rotating your tires. When you install dual wheels, besure the vent holes in the inner and outer wheels on each side are lined up. After the tires have been rotated, adjust the front and rear inflation pressuresas shown on the Certificationflire label. Make certain that all wheel nuts are properly tightened. See "Wheel Nut Torque'' in the Index. 6-44