Buick 2007 LaCrosse Owner's Manual page 436

To store a full-size tire, do the following:
1. Install the tools in their original location in
the trunk area and secure.
2. Place the tire valve stem facing down and
the protector/guide placed through a wheel
bolt hole.
3. Remove the protector and attach the retainer
securely.
4. Store the cover as far forward as possible.
When storing a compact spare tire in the trunk,
put the protector back in the foam holder.
The compact spare is for temporary use only.
Replace the compact spare tire with a full-size tire
as soon as you can. See Compact Spare Tire
on page 437. Use the following as a guide
for storing the compact spare tire and tools.
436
Compact Spare Tire
A. Cover
B. Retainer
C. Compact Spare Tire
D. Wing Nut
E. Jack
F. Wheel Wrench
G. Extension Protector
H. Foam Holder
I. Bolt Screw