Just got my new truck for work. It's a 2008 Chevy Express 1500. The factory deck will have to go. No CD player, no aux jack, no RDS, no HD radio, nothing. I'd like to install the Nextar 990C ive been using in my old truck for the last couple years. It has a USB jack for thumb drives, and a slot for SD cards. Really handy for my podcasts and audiobooks.

Do I really need to spend a lot of money on fancy harnesses with chime replacement etc? Should I leave the factory deck and mount my aftermarket elsewhere? Maybe run seperate speakers, or have a relay switch the speakers from one deck to the other.

Has anybody else had to deal with these GM LAN issues?