As far as I know there are no head unit specific to vehicle specific wiring harnesses at all. The aftermarket receiver will have it's own manufacturer supplied plug which most installers pair up with a vehicle specific wiring harness. There are some dealers that will mate the 2 for you providing a plug in solution. One in particular, www.installer.com
, in Houston, TX, would solder and heat shrink any 2 harnesses together for about $25. But for the last few days, their website seems to be down. I'm not sure if they have closed up shop or what.
Hope this helps.