I do have Lifetime map updates and use it regularly. I still have the 2689LMT, a 2599LMTHD and the GPSMap 78sc which I use for marine applications. I got the Nuvi 55LM to replace a Nuvi 2595LM that went south (broken display screen ribbon). What I wanted to know if CN North America Lower 2020.20 be replaced with CN North America All 2020.20 since we go to Canada fairly regularly ( when it opens again). I have a copy of CN North America All 2020.20. I know that I can probably run it off an SD Card like CN Europe but would like to replace the CN version on the 55LM with the CN version ALL which is on all my other Nuvi's. Thanks, Jim