Quote Originally Posted by catymag View Post
look here
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rename them like the older ones and replace them in the same position in your nuvi
Informative link thank you. I will try that with the .jcv and the 3dmap.img file I have. I'm not sure if you are aware but it appears that Garmin has changed their map loading location on their newer devices. The gmapprom.img file is now stored in a hidden folder called ".system". There still is a GARMIN directory but it does not contain any .img files. As a test I moved the gmapprom.img into the GARMIN folder and the map was not recognized so it looks like now all .img maps must be placed in the .system folder. I have a Nuvi 1390T not sure how the other models work but I'm assuming their new "slim" Nuvi models work the same way.