If the radio is locked, you need the code to unlock it. There are a couple of ways to do this. First, if you have the original owner's manual, it should be listed there. Also, it would have come with a "device card" which will have the info.
Other than that, the code can be retrieved from the central database using a scan tool, but that will require a dealership.
One other thought. There were some that had the codes indicated on a label stuck on the radio housing. You may want to check there as well.
If you look below, I highlighted the relevant info from my manual. I hope something here helps. If you have other questions, let me know.
See pic below.
Monday, November 22nd, 2021 AT 9:08 PM