Buick Century 2003 Owner's Manual page 268

Removing the Spare Tire and Tools
The equipment you'll need is in the trunk.
5-68
1. Turn the center nut on
the compact spare tire
cover counterclockwise
to remove it. Then
lift and remove
the cover. See
Compact Spare Tire on
page 5-78 for more
information about the
compact spare tire.
2. Remove the spare tire.