Hello, I have done a ton of research, but can't seem to find enough information on what I am looking for.

We recently purchased a larger screen dvd player to replace the old stock 7" dvd player from our 2005 suburban. I was hoping that it would be a simple swap of wires, but I am getting the feeling it is not. I did find the diagram for the wires to the old one, but they do not seem to match up to the wires in the new one. Is it possible to easily swap the units and have the new one work on our car speakers like the old one did? I get that I can connect the battery and ground wires for power, but how do I hook up the sound?