I did not purchase the NAV option on my tahoe and am wanting to see what options are out there for me. I have read a little and see that it looks as if there are two options from GM, one that plays DVD'sand one that does not. I hope this is correct. Where is the best place to purchase these new units(and price)and what else is required other than swapping out the units with my existing radio. Any antenna differences, mounting, wiring etc...? Thanks

 

ebay
1100 to 1500 dollors.I justinstalled mine this past week end. The DVD model ends in 15882766 but gm just released new models with updated softwear and have a new part #'s.
See a few threads down
"Can you make heads or tails of this"
Their is a ton of info on this subject