I believe Crutchfield supplies the Harness for free. So you should be good to go!!
Yes they do although they did not tell me that when I ordered one with my stereo so don't do this if you buy a stereo from them. I ordered it online and didn't talk to anyone so they probably just missed my error or thought I may have wanted two.
You are still going to have to wire in the harness to your stereo but with this harness you will buy that plugs right into the factory harness it is easy. With Crutchfield everything will be labeled along with a big manual that tells you everything you will ever need to know. I would highly recommend them. People say they are pricey but with the free harness, manuals, and all the help they give you it's well worth it. I have NEVER had better customer service.
OH! When the manual says apply this wire to the ground of your parking brake...don't do it, just ground it with everything else. This is for the DVD player and I don't recommend watching DVD's while driving down the road but you don't want to set the parking brake every time you want to watch something. I use to also to put in a DVD to listen to and then swich to a different screen while driving. They don't want you to do that is why they want you to ground it to the parking brake.