Jess

Key no longer works in driver side door lock. Happened overnight. No idea why this has happened. Still works in all other locks on car. I need the key code for a chevrolet dealer to be able to replace the lock, I am the third owner of this car and the key code was on a tag on the keys which presumably was lost a long time ago. I have never had it in my possession. How else can I get the key code? Thanks