1998 Cadillac DeVille Owner's Manual - Page 279

6. Remove any rust or dirt from the wheel bolts, mounting surfaces and spare wheel. A CAJTION: Never use oil or grease onstuds or nuts. If you do, the nuts might come loose. Your wheel could fall off, causing a serious accident. 7. Replace the wheel nuts of with the rounded end the nuts towardthe wheel. Tighten each nut Rust or dirt on the wheel, or on the parts to which it is fastened, can make the wheel nuts become looseafter a time. The wheel could come off and cause an accident. Whenyou change a wheel, remove anyrust ordirt from theplaces where the wheel attaches to the vehicle. In an emergency, you can use a cloth or a paper towel to do this; be sure to use a scraper orwire but brush later,if you need to, to get all the rust or dirt off. 5-30