Cadillac 2012 CTS Owner's Manual page 408

A. Wing Nut
B. Spare Tire
C. Jack
D. Subwoofer (If Equipped)
E. Wheel Wrench (Two-Piece
Shown, Three-Piece Similar)
F. Extension (If Equipped)
G. Cable
To access the spare tire and jacking
equipment:
1. Remove the spare tire cover.
2. Remove the subwoofer (D),
if the vehicle has one.
To remove the subwoofer:
2.1. Turn the nut (A)
counterclockwise to
remove.
2.2. Disconnect the
connector wire.
2.3. Pull the subwoofer (D) up to
remove it from the stow rod.
3. Remove the spare tire (B) and
place it next to the flat tire.
4. Remove the jack (C), wheel
wrench (E), and extension (F),
if the vehicle has one.