Interior Upgrades 08 Sierra

[Joe_Miami_Sierra]

I have an 08 Sierra. I want to throw a few bucks at the truck to update it a bit. Been shopping for new head-unit with nav, blu-tooth, rear-view cam, etc. However, I am interested to know if anyone is aware of a GMC product (or aftermarket I guess) that replaces the head unit with nav, etc. AND connects to a rear in-seat dvd system? Vehicle currently has no entertainment.

Any thoughts or suggestions are appreciated.