Cadillac 2011 CTS Coupe Owner's Manual page 427

Use the following diagram as a
guide for storing the compact spare
tire and tools in the trunk:
A. Wing Nut
B. Compact Spare Tire or Flat Tire
C. Jack
D. Wheel Wrench
E. Extension
F. Strap
Reverse the instructions for
removing the spare tire and tools to
store the compact spare tire.
Use the following diagram as a
guide for storing the compact spare
tire and tools in the rear
compartment area:
A. Wing Nut
B. Spare Tire
C. Jack
D. Subwoofer
E. Wheel Wrench
F. Extension
G. Strap
Reverse the instructions for
removing the spare tire and tools to
store the compact spare tire.