I very recently bought a new Isuzu and the built in dash GPS map stinks. It lacks many roads and the navigation is not to be trusted. The map is Igo Primo with Tom Tom Points of interest. If you are familiar with Jomtien, the second road is not on the map. The roads in my village upcountry are not there either. My cheap Garmin shows all the roads and is very accurate. It's a shame to have a cheap Garmin sitting on the dash and the built in unit unusable. Isuzu says the Igo map is up to date. I emailed them and asked them how they can build a nice truck and put such a crap map in the expensive built in GPS. The radio is good as well as the backup camera and my iPod works great. Does anyone know if it is possible to use a Garmin ESRI map in the Clarion unit?

There are no techies here that know how to use different maps on the Isuzu Clarion media center?