Thread: Nuvi 1490LMT can't Update to NA 2014.20

Originally Posted by coco01

there is no map on my 1490LMT after I update to NA 2014.20 even I see on my 16 GB Micro SD Card had folder Garmin (gmappupdate = 0KB), Folder Map which 3 files (gmapupdate = 3KB, gmapupdate = 1756128KB, gmapupdate = 1KB), But nothing at \Tools, Settings, Map, Map info ...........

For a start, enable folder options in Windows to show known files types. In Windows: Control Panel>Folder Options>View>Uncheck 'Hide extensions for known file types'. While there uncheck 'Hide Protecting Operating System Files(Recommended)'. More info here: [Only registered and activated users can see links. ].

The zero content file in the Garmin folder is gmappupdate.gsd which is associated with the JCV file, the files in the Map folder are gmapupdate.gma [3KB] the GMA file for the map, gmapupdate.img [1756128KB] being the NA map itself, and gmapupdate.unl [1KB] the map unlock code.

All your files are correct. Remove the mircoSD from the unit, backup your favourites, hard reset it or clear NV, turn it off, re-insert the card then reboot the unit and it should show the map. If it doesn't check the format of the card, try a reformat [FAT32] then re-download the map or try the files on another card.