2007 Chevrolet Cobalt Owner's Manual - Page 363

9. Remove all of the wheel nuts. CAUTION: (Continued) accident. When you change a wheel, remove any rust or dirt from the places where the wheel attaches to the 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 needed, to get all the rust or dirt off. 10. Remove any rust or dirt from the wheel bolts, mounting surfaces, and spare wheel. {CAUTION: Rust or dirt on the wheel, or on the parts to which it is fastened, can make the wheel nuts become loose after time. The wheel could come off and cause an CAUTION: (Continued) 363