Cadillac 2012 CTS-V Owner's Manual page 418

The tire sealant and compressor kit
has an accessory adapter located in
a compartment on the bottom of its
housing that may be used to inflate
air mattresses, balls, etc.
To remove the sealant canister:
1. Unwrap the sealant hose.
2. Press the canister release
button.
3. Pull up and remove the canister.
4. Replace with a new canister
which is available from your
dealer.
5. Push the new canister into
place.
The tire sealant and compressor kit
is located in the rear of the vehicle.
A. Tire Sealant and
Compressor Kit
B. Foam Container
C. Subwoofer (Optional)