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99 silverado 2500 6.0 engine into 2003 silverado 2500

This is a discussion on 99 silverado 2500 6.0 engine into 2003 silverado 2500 within the GM Trucks forums, part of the Vehicle Specific category; Hello Everyone, Newbie here. This is my 1st post. I came cuz you guys (and gals) are the experts right? ...

  1. #1
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    2003 Silverado 2500

    99 silverado 2500 6.0 engine into 2003 silverado 2500

    Hello Everyone,

    Newbie here. This is my 1st post. I came cuz you guys (and gals) are the experts right? I have a 1999 silverado 2500 with the 6.0 motor and push button 4wd. I picked up a 2003 silverado without motor tranny and transfer case. The issue I have is the 2003 has the floor shift. Do I need to get a different transfer case? Will this engine/tranny swap work? I thought about taking the whole dash out of the 99 and putting it in the 2003 just to have everything match up but looks like a major job. Any thoughts or suggestions would be great. Thanks!

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    Senior Member 5.0THIS's Avatar
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    95 Z28

    Get the different transfer case or you'll have to wire up the 2003 for the push button T-case. I'm sure you can buy new (or find used) the factory buttons for the push button case. Then it just has to be wired, and there's a chance it already has the wiring there (doubtful, but possible). I'm not sure if you'll need a BCM for that push button T case.
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  3. #3
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    white
    2003 Silverado 2500

    Ok. that is kinda the route I was thinking. The manual case seems like the way to go. The guy had a 6.0 in this truck already, so with any luck, the rest should bolt up. Thanks!

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