1997 Buick Riviera Owner's Manual - Page 230

7. Remove any rust ordirt fi-om the wheel bolts, mounting surfaces and spare wheel. 5. Raise the vehicle by rotating the wheel wrench clockwise. Raisethe vehicle far enough off the ground so there is enough room for the sparetire to fit. 6 . Remove all the wheel nuts and take the flat tire. off Rust or dirt the wheel, or on the parts to on which itis fastened, can makethe wheel nuts become loose after a time. The wheel could come off and cause an accident. Whenyou change a wheel, remove anyrust or dirt from the places where thewheel attaches to the vehicle. In an emergency, you can usea cloth or a paper towel to do this; but sure touse a scraper orwire be brush later, if you need to, to get all therust or dirt off. 5-29