“So I have a 2004 Cadillac deville and this the only device that is compatible to it. Is there anything else that I might need to buy that doesn't come with the kit?”

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• You want to see the recommended harness that you may need. Do you have steering wheel controls or anything like onstar that you want to keep functional?

  Answered by Sticky 5 years ago

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• Metra wiring harness will be needed as well.

  Answered by 1iron 5 years ago

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