Does a 2001 GS have the same navi as a 2002 SC? my friend has a newer Navi DVD just wondering if we got the same system

it probably does, but i thought you need an upgrade dvd and not just the original disc?

I believe the two systems are the same setup, however, the NAV in 2002 should be faster because they upgraded the CPU. I know this was true based on the 2001 LX and 2002 LX NAV systems.