But i have searched for this one for about 2 days and haven't found a direct answer. I am either going 1 of 2 ways. I am wanting to upgrade my speakers and put a sub in, so i am going to have to find out if that pac harness for adding a amp will work on the factory REC. Or another option is for me to replace everything, headunit and all. But the question is if i was to replace the headunit with say a kenwood 8100 would my stock rear dvd system still be able to work, and what about my sirius. One i bought the truck used and it already had sirius working on it so if i can continue to get it to work without having to pay for a new subscription or adding a new antenna and all that i might just replace everything in there. So recap on long post, can the rear dvd be used still with aftermarket hu, and can my sirius still be hooked up?

 

http://mobile.jlaudio.com/products_c...hp?prod_id=369