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Thread: Official NBS 4.3v6 to GEN 3 V8 swap Guide

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  1. #1
    Join Date
    May 2009
    Location
    hot & windy
    Posts
    1,117
    it's newer than 99, so it already has the V8 PCM - so long as it's the silver one.
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  2. #2
    i faced some problems during my swap any help will be good

    1- the frame mount don't fit under oil pan but my stock one fit great .
    2- there's some holes under water pump what are they for ?

  3. #3
    Join Date
    Jan 2012
    Location
    DFW, TEXAS
    Posts
    594
    Quote Originally Posted by BIG BLOCK 555 View Post
    i faced some problems during my swap any help will be good

    1- the frame mount don't fit under oil pan but my stock one fit great . V8 frame mounts and V8 engine mounts- they will fit
    2- there's some holes under water pump what are they for ?
    do you mean open threads? any pics

  4. #4
    i guess it's .. i will upload some for you

    i install my engine without looking on this :l ,

    also about my engine harness ( new one ) do you guys have detailed pic's installation ?

  5. #5
    Join Date
    Jan 2012
    Location
    DFW, TEXAS
    Posts
    594
    pics of a engine harness?

  6. #6
    yup

  7. #7
    Join Date
    Jan 2012
    Location
    DFW, TEXAS
    Posts
    594
    Quote Originally Posted by BIG BLOCK 555 View Post
    yup
    now your playing too many games, find a 99-2001 engine harness. It will be red/blue on the ends that plug into the pcm. keep the pcm thats in your truck. (send it to nelsonperformance.com) no more silly questions! if thats too hard, pay someone to do the swap for you

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