I’m interested to see if what you end up doing. I have a 2015 Freedom 225 and the garmin won’t update (won’t register any SD cards. It’s also a weird year where it has WiFi connectivity but can’t update maps that way (confirmed with garmin). Eventually I will need to replace the panel and hopefully it’s a plug and play with just a bit of adjusting the cut out.
Sean,
Did you download the suite of updates to a blank SD card, and try to do updates that way? It took me 2 tries, but with a new blank card, it worked. When I installed the card, a pop up window appeared, and offered to do the update. Clicked yes, or OK, or whatever it was, and in just about a minute, it was successful.
Before I did that, it wouldn't recognize a GSD24 in had just installed, but after the update, it did, and everything worked as it should.
Garmin software updates