This is a new OEM spare tire lock for a 2015-2019 Cadillac Escalade rekeyed to match your key code, or you can use the default key code and key included with the lock. Write your key code in the "key code" box when checking out, or write "default" if you want to use the default key code and key included with the lock. If you choose "default," then the lock will be rekeyed to the default key code, and your key used to operate your vehicle will not work with this lock. You will need to use the key included with the lock to operate the lock. Contact us with any questions you have. Thanks!