Buick 2010 Lucerne Owner's Manual page 404

To store the compact spare tire and tools:
6-98
A. Center Retainer
B. Compact Spare Tire Cover
C. Retainer
D. Washer
E. Jack Container
F. Spare Tire
G. Wheel Wrench
H. Jack
I. Foam Insert
J. Bolt
1. Open the trunk. See Trunk on page 3-12.
2. Place the foam insert (I) in the trunk compartment.
3. Reinstall the compact spare tire (F) face down.
Line up the wheel center hole with the bolt (J).
Then place it on the compartment floor.
4. Insert the jack container (E) into the spare tire (F).
5. Insert the wheel wrench (G) and jack (H) into
the center of the compact spare tire making sure to
line up the wheel nut hole with the bolt (I) on the
compartment floor.