Thread: which new maps will work on Nuvi 1490

Looking at the .system folder there are no files with an extension of .unl or .gma

there are only :
fs_image.ver
gmapbmap.img
gmapbmap.sum
gmapprom.img
gmapprom.sum
gmaptz.img
gmaptz.sum
locales.xml
TrafficProvider.xml

There is no garmindevice.xml in the garmin folder or it's sub folders, the only item in the garmin folder is a sub folder LEX_PKG.

Originally Posted by NickSums

Looking at the .system folder there are no files with an extension of .unl or .gma

there are only :
fs_image.ver
gmapbmap.img
gmapbmap.sum
gmapprom.img
gmapprom.sum
.

the gmapprom.img should be the large file with the maps inside. If you are unsafe what to do, take a 4GB micro sd card, create a folder "map" on the sdcard, and copy the 2015.40 version "gmapsupp.img" in the map folder on the sdcard. The original gmapprom.img on the device rename to gmapprom.im_, so the nuvi cannot detect the old map. If the new mapfile doesnt work, you can go back the steps without "data loss".