The 430N manual provides a Garmin link to go to for map updates and support. At first the link didn't work (404 error) but now the site is active. However, there are no software or map updates posted. I sent the following to Garmin support:
"I just purchased a new 2011 Jeep Grand Cherokee Limited with an installed 430N media center radio that includes Garmin Navigation. Do I need to register this with mygarmin? If so, how do I do so? There is no way to connect the Jeep to a computer via USB. I don't know of any serial number associated with the Jeep radio system. I will certainly want to be able to obtain Garmin software updates and will probably want to purchase map updates for the Garmin in my Jeep. Please advise."
I just now got this response:
"Since this is such a new unit there is no process at this time to register the unit. In the future when software and mapping updates are available a process will be put into place."
It looks like we'll have to wait a bit for any Garmin updates.