I tried this, but it didn't work 
This would be helpful if your original Garmin Nuvi dies and you won't have to get a new one!
Thanks for trying but the prices on used Nuvi devices has dropped a lot since Scotty posted that procedure. A used Garmin Nuvi that has free Lifetime map updates and the files we need for the Uconnect Nav can be purchased for $50 to $70; or less. Just look on this forum, Craig's List, eBay, Facebook Marketplace, etc... I bought mine off Craig's List.I tried this, but it didn't work
If the Nuvi device included Lifetime map updates they will not expire. I bought a used 2595LM and all I needed to do was register the device to continue receiving the map updates. If you're buying a used Nuvi just lookup the model on the internet and see it's features when new.isn't there the risk that you could get a used unit that is outside of the 24-month rule and can no longer download maps?