Do you have a conversion kit for the Maverick?
Non-Sync 3 mavericks pose a challenge because the base Sync system offered in the XL and XLT’s don’t actually have an APIM. Everything is ran from the ACM.
To upgrade those you would need to replace your ACM with one that came a maverick that had Sync 3. Then a custom harness needs to be made to bridge the ACM and the APIM together.
We can provide the APIM and the programming if you wanted to go this route.