2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 570

7. Remove all the wheel nuts and take off the flat tire. WARNING: (Continued) rust or dirt from places where the wheel attaches to the vehicle. In an emergency, 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. See Changing a Flat Tire on page 6‑100. 8. Remove any rust or dirt from the wheel bolts, mounting surfaces, and spare wheel. { WARNING: Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. When changing a wheel, remove any (Continued) 9. Install the spare tire. 6-110