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    I did this about 4 years ago in a 95 2 door 4x4...

    I did this about 4 years ago in a 95 2 door 4x4 Yukon. I still have it but haven't driven it much.
    I replaced the 4L60 with a 4l80 & the stock T-case with a bw4401 (1 ton case).
    Different flex...
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    Thanks EagleMark for your opinion. on another...

    Thanks EagleMark for your opinion.

    on another note did you get my pm about my other project ?
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    Thanks for info. What aftermarket harness would...

    Thanks for info.
    What aftermarket harness would you go with & why ?
    So far Im into this pretty cheap & don't mind spending a little money to save time on the harness.
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    97 vortec into a 86 diesel truck

    As title says

    I have an 86 M1028 (basic k30 Chevy) & want to convert to gas.
    I bought a low mileage 97 Chevy 3/4 ton 2wd & plan to install
    vortec 350/4l80 into the 86.

    Im looking for...
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    Almost a year later, back on this. EagleMark...

    Almost a year later, back on this.

    EagleMark please send me your contact info. I need to purchase some stuff from you :)
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    THANK YOU for the diagram. I can only get pump...

    THANK YOU for the diagram.

    I can only get pump to work if I jumper the the oil pressure switch.
    I replaced oil pressure switch & now have to unplug it to get my pump to shut off.
    I can hear fuel...
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    Got everything worked out except one issue. I...

    Got everything worked out except one issue.
    I was having low voltage to my fuel pumps (one at a time).
    I replaced my oil pressure switch & now my fuel pump wont shut off.

    Can someone explain...
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    I have fixed most of the harness, I still have...

    I have fixed most of the harness, I still have one issue with the tank wiring (only getting 9.65 volts) not enough to power fuel pumps.

    I can supply 12+ to it & get it to work, but its not right....
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    Also in 3/4 ton burbs in 91 but they got a np241...

    Also in 3/4 ton burbs in 91 but they got a np241 t-case.



    Well I got the harness finished up & halfway put back in.

    Now chasing wiring issues for dual tanks & fuel pump relay (some people...
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    Yeah, 1 year only in the crew cabs

    Yeah, 1 year only in the crew cabs
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    Thanks Yes, I severely abused an 84 J20 I use...

    Thanks

    Yes, I severely abused an 84 J20 I use to own.
    I have an m715 but its in a big pile of parts right now (in a long slow repower & drivetrain upgrade).

    Nice cherokee
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    Thanks for the heads up. Its a 91, I dont think I...

    Thanks for the heads up. Its a 91, I dont think I have to worry about it.

    Im still cleaning & replacing wires, hope to have the harness done today.
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    Well, I removed the complete harness & fuse panel...

    Well, I removed the complete harness & fuse panel from the truck today.
    Its not as bad as I thought it is.
    The ecmb wire melted from the fuse panel to the junction block at the firewall (between...
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    Thanks for the info. I am continuing to search. ...

    Thanks for the info. I am continuing to search.

    I do know this was a ONE year only setup which is making finding parts even harder.
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    Hello, new member here

    Hello,

    I stumbled across this forum tonight & it looks to have a lot of good info.

    Looking to learn more about the tbi setups.
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    tbi harness question

    I have a 91 v3500 with a tbi 350/4l80/205.

    My problem is I have a burnt harness & missing ecm.

    From the searching I have done, The ecm should be 1227747. Is this correct ?
    My next question is...
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