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GM to cummings swap

Discussion in 'Truck & Equipment Repair' started by 94chevy2500, Mar 1, 2011.

  1. 94chevy2500

    94chevy2500 Senior Member
    Messages: 102

    anyone know where to find wireing harnesses to swap a cummimg 12v 5.9 into a chevy im thinking about doing it this spring ive already decided to restore it might just go the extra step lol
  2. thesnowman269

    thesnowman269 Senior Member
    Messages: 965

    whats a cummings?
  3. mwalsh9152

    mwalsh9152 Senior Member
    Messages: 434

  4. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    I think its a part on a sailboat
  5. Mark13

    Mark13 PlowSite Fanatic
    Messages: 5,796

    If you can't spell Cummins maybe the swap is to much for you.

    And what wires do you need? Run a mechanical fuel shut off, power to the starter and a way to turn the fuel pump on and off.
    If it's inplace of a 6.5 I think the tach on the 6.5 reads off the alternator so just use the 6.5 alternator on the 12v with different brackets. I read into this alot more at one point but don't remember much about it.
  6. mercer_me

    mercer_me PlowSite Fanatic
    Messages: 6,371

    First thing, it's Cummins not Cummings. That said keep us posted on how it works out for you. It's always bean my dream to put a 5.9L 24 valve Cummins in a GMC 2500HD with an Allison transmition.
  7. Ozark Hillbilly

    Ozark Hillbilly Member
    from Misery
    Messages: 53

    I'm not very hopeful that you will find a ready made wiring harness adapter to do what you want. There are just too many possible variations of vehicle year and model wiring harness connector locations and types for it to be likely that someone manufactures that for such a low volume market. What you needed would also depend on whether the transmission was getting swapped also or staying original.

    Someone could custom make an adapter for you but it would be expensive for what it was.

    I agree with mark13 that it would be by far the best to make the simple modifications needed to the current wiring so that you can operate the engine and get instrumentation
  8. 94chevy2500

    94chevy2500 Senior Member
    Messages: 102

    im thinking about replacing the 5.7 in my 94 2500 i was just woundering if they made a harness or would i have to make my own harness. and my bad for the spelling im bad at spelling haha all the headlight wireing and all the non engine wiring should be fine right i would just leaving it in or does everything have to be changed?
  9. PlatinumService

    PlatinumService Senior Member
    Messages: 559

    Second thing, its transmission not transmition
  10. 94chevy2500

    94chevy2500 Senior Member
    Messages: 102

    why does the spelling even matter if i know what i mean and what others are saying i dont understand why people just make useless comments
    Last edited: Mar 7, 2011
  11. 94chevy2500

    94chevy2500 Senior Member
    Messages: 102

    i do find this funny tho if your going to coment on spelling then u should know how to spell. lol
  12. LHK2

    LHK2 Senior Member
    Messages: 205

    Got ta wunder ware sum peple lerned to spel. ad sekond, thet thy ar n busnus.:laughing:
  13. 94chevy2500

    94chevy2500 Senior Member
    Messages: 102

    wow 6 out of 8 replies were pointless this place is starting to get ridiculous. i thought this place was for getting info and looking at thers equipment and work not an online spelling class
  14. rob_cook2001

    rob_cook2001 2000 Club Member
    Messages: 2,192

    check out destroked.com and fordcummins.com
    Mark is right though, find a 94-early 98 motor and it is a pertty easy swap.
    A friend of mine did one into a 95 dually and just replaced all the insturaments with autometer gauges. Pretty cool setup. If i remember right the swap only took him a little over a week to do.
  15. mcwlandscaping

    mcwlandscaping 2000 Club Member
    Messages: 2,557

    Keep us updated, maybe i can do this on my '97 if i keep it.....probably won't be easy to find a donor motor though!
  16. ProSeasons

    ProSeasons Senior Member
    Messages: 624

    The darn things are EVERYWHERE...I broke down in Nashua, NH. Pretty up there, at that rest stop right on the border, like a library inside. I was there for 3 days walking, jogging around the neighborhood.
  17. 94chevy2500

    94chevy2500 Senior Member
    Messages: 102

    well just bought a new dump and its diesel so idk if im going thru with this now. i would like to but now i might just rebuild the 350 motor thats in it to save a little money but if i get some good hard scape jobs then it could be a good possibility that it will happen but only time will tell haha