2008 Cadillac DTS Owner's Manual - Page 376

10. Remove any rust or dirt from the wheel bolts, mounting surfaces, and spare wheel. {CAUTION: 8. Raise the vehicle by turning the jack handle clockwise. Raise the vehicle far enough off the ground for the spare tire to fit under the vehicle. 9. Remove all wheel nuts and the flat tire. 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 you change a wheel, remove any rust or dirt from 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. See Changing a Flat Tire on page 5-77. 5-82