Thanks for your help. At the present, I have different keys for each of the front doors and wanted to be able to lock the rear also. I live in a small town, I will try to find a locksmith that can help.
Take all of the locks to the locksmith including the glove box. He can clean them up and re-key them to a new code or if you have a key that you want to keep, he can key them to that one too. Years ago, I took it down to an old locksmith and he showed me how to do it myself, gave me the parts and didn't charge me a dime. Maybe this guy will help you out too.
