1995 Buick Regal Owner's Manual - Page 200

To remove a center cap, use the wrench to pry gently at the notch. Don't use a tool that is narrower than the wrench to pry at this notch. Turn the nut holding the jack and wrench counterclockwise and remove it. Then remove the jack and wrench. If there is a wheel cover, loosen the plastic nut caps with the wheel wrench. They won't come off. Then, using the flat end of the wheel wrench, pry along the edge of the wheel cover until it comes off. Be careful; the edge may be sharp. Don't try to remove the cover with your bare hands. If your vehicle has wheel nut caps, remove them using the wheel wrench. 5-26