Truckdown pois are for dezl and RV 760LMT are not provided for other device probably
some info here
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Usually our uploaders add the new file in CNNAM thread when map is updated. You got it from there.
gmapbmap is the basemap, you can update it using the link I gave you in previous post.
Install Garmin usb drivers
Code:
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connect nuvi to pc and look at files if you have gmapbmap.img file
Make a hard reset when nuvi acts weird.