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  1. #1

    Default 2004 sierra radio adapter?

    I just purchased an 04 Sierra work truck and am trying to install a Kenwood KDC-MP5028.

    I tried to hardwire it in but it wouldnt even power up. I've installed other car radios before and not had a problem but this is the newest truck I've owned and im having problems. My pal has the same truck and he told me I need to buy an "adapter" to go between the trucks stock harness and the Stereo. Problem is I cant find it online. Do I need to get a whole new HArness for the truck or just a simply install kit?

    This truck is badass by the way hehe . I had a 16 year old Wrangler before this. Im SO happy with my GMC!

  2. #2


    You do need an adapter to go between the harness and the head unit which will keep all the door chimes, etc. I bought mine at WalMart and it is made by Scoshe. I have an 04 silverado and put a new JVC head unit in my truck. I did a lot of research on this and there is more stuff wired through the stock head unit than just the stereo stuff. If I remember right the adapter was around $30 which was the cheapest I could find.

  3. #3


    dude awesome thanks!

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