2003 Chevrolet Astro Owner's Manual - Page 296
2003 Chevrolet Astro Manual
Page 296 highlights
9. Remove any rust or dirt from the wheel bolts, mounting surfaces and spare wheel. 10. Put on the compact spare tire. Put the nuts on by hand. Make sure the cone-shaped end is toward the wheel. Tighten each nut by hand until the wheel is held against the hub. If a nut can't be turned by hand, use the extension and see your dealer as soon as possible. Rust or dirt on the wheel, or on the parts to which it is fastened, can make the wheel nuts become loose after a time. The wheel could come off and cause an accident. When you change a wheel, remove any rust ordirt from the places where the wheel attaches the to vehicle. In an emergency, you can use a cloth or a paper towel to do this; but be sure to use a scraper or wire brush later, if you need to, to get all the rustor dirt off. - Never use oil or grease on studs or nuts. If you loose. Your wheel do, the nuts might come could falloff, causing a serious accident. 11. Lower the vehicle by turning the ratchet counterclockwise. Lower the jack completely. 5-79