I just got off the phone with Crutchfield and they said I would have to run wires from the new head unit to the front and rear speakers. I thought they have an adapter or harness or something that can be used but they said no. Is this true? Has anybody changed their head unit and used a Harness or adapter? If so where do I find out about getting one. I do not want to start tearing apart my car to run speaker wires. Nor do I want to pay $150 to have a $175 head unit installed. That is the cost to have the head unit and rewire done.