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2003 STS w/BoseNav, 1993 Deville, 1985 Deville
1,088 Posts
I'd have to agree with davesdeville. I don't think it would be easy. It will require some detailed knowledge on how the audio system is wired, etc.

If you had the Factory Service Manual with the wiring diagrams, you'd have a fighting chance. Maybe we can hope for something labelled "Aux Video Input", but that would be a long shot.
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