2005 Cadillac DeVille Owner's Manual - Page 348

Removing the Flat Tire and Installing the Spare Tire 2. Using the wheel wrench, loosen all the wheel nuts. Do not remove them yet. Models with Center Wheel Cover 1. For models having aluminum wheels with a center wheel cover, use the flat end of the wheel wrench to gently pry the wheel covers off. Be careful not to scratch the aluminum wheel edge and do not try to remove it with your hands. For models having wheel nuts exposed, use the wheel wrench to remove the wheel nut covers. 5-80