i am selling an unopened gm 2 disc navigation dvd set. this will work on all c6 vetts and maybe others.
it is the newest set with the most POI's yet, it has so many that it comes with 2 discs.
gm p/n 25852830 version 4.0. sorry i have no pics but it is brand new and unopened.
you could search this forum and see all the great things people are saying about them and they are about $200 from gm but i will sell for $150 shipped