How do you update maps in a GPS navigation device using a USB cable?

[brookshuang]

I am using a Initial model number GM-501 unit. it uses Navteq maps and It came with the 2005 edition of the U.S.A. and Canada The manual that came with it mentions nothing about how to do this or what I need to purchase to complete this action. I have been to the Navteq site and they have tons of maps for sale and I am not sure which one to buy so I don't corrupt the turn by turn voice on this device.

[PatrickJa]

We do not support navigation devices, I would advise you to go to the company that created the device and ask their support for further assistance.

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