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Dash Wiring Harness - Project Feasibility

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  • Dash Wiring Harness - Project Feasibility

    On a 2004 Silverado C1500 WT, I'm considering swapping out the Dash wiring harness with another truck.

    WT models don't have the same wiring features as base models, steering wheel controls, electronic mirrors, etc.

    In 2004 and up, GM deleted courtesy lights.

    I've heard that GM changed wiring between 2002 and 2003. However, the wiring harness (GM Part # 15196623) on some sites is listed as fitting 1999-2007 Silverado and Sierra Trucks.

    I can likely pick up a harness for $35 at a junk yard. So I'm thinking a 1999-2002 Sierra/Silverado may work...and a 2003 should work.

    Any thoughts/comments/corrections/tips/gotcha's on the above information? Will a harness with Onstar/power windows/etc. still work? Will the heater core need to be removed? Anyone have any information on which harness will fit mine for sure?

    If feasible, is there anything you would recommend replacing during this massive swap?

  • #2
    The heater core shouldn't have to be removed as I am pretty sure the A/C box is the first thing they install. Pulling the dash isn't too bad. Be careful when you disconnect the airbags. Just for your own safety I would recommend googling the proper procedure.

    I would recommend you do this by yourself when you have plenty of time. I had a friend help me when I changed cabs on my truck (I had to change out the entire interior from one to the other) He helped put it back together and I had to pull a bunch of stuff back apart because he didn't hook some things up.

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    • #3
      Originally posted by Markmx6 View Post
      The heater core shouldn't have to be removed as I am pretty sure the A/C box is the first thing they install. Pulling the dash isn't too bad. Be careful when you disconnect the airbags. Just for your own safety I would recommend googling the proper procedure.

      I would recommend you do this by yourself when you have plenty of time. I had a friend help me when I changed cabs on my truck (I had to change out the entire interior from one to the other) He helped put it back together and I had to pull a bunch of stuff back apart because he didn't hook some things up.
      Just curious when you were changing out cabs, was it the same year?

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      • #4
        I rolled the truck. Found a new cab and doors with glass with a clean title for $1100. Went from a 2002 to a 2001 so not much of a change. The new cab had absolutely no interior though so it wouldn't have been a big deal if the years were further seperated...

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