Chevrolet MONTE CARLO 1998 Manual page 209

If there is a wheel cover, loosen the 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.
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.
If your vehicle has wheel nut caps, remove them using
the wheel wrench.
5-28