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

  1. #81
    Join Date
    Nov 2003
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    Denton Texas
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    yep, that's the way it works. Nelson Peformance sells them for $50 or so and you can have them throw a tune in it at the same time. Get VATS/Passkey disabled while he's tuning it.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #82
    Join Date
    May 2009
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    then i reckon the OP needs to be changed...

    anyway, i guess i'll have to talk to my tuner tomorrow - he's already tuned my last engine & does free updates as well, so i'd rather not have to pay for another tune because i'm already spending borrowed money...
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  3. #83
    Join Date
    Dec 2007
    Location
    wichita falls, tx
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    3,067
    Quote Originally Posted by zebra View Post
    then i reckon the OP needs to be changed...

    anyway, i guess i'll have to talk to my tuner tomorrow - he's already tuned my last engine & does free updates as well, so i'd rather not have to pay for another tune because i'm already spending borrowed money...
    so your truck had the old style 88-98 pcm?...thats odd...never seen one in a 99-up truck

    and hey its always better to spend someone elses money, just suck u have to pay it back...
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
    Intro Radicalli's

  4. #84
    Join Date
    May 2009
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    yep. black box with 4 connectors. 99 was a real bastard year for these trucks...
    i reckon i gotta find a mounting box, too because the old one won't hold a 411 - i already tried last month
    Last edited by zebra; 08-31-2009 at 04:45 PM.
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  5. #85
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
    13,138
    Mine was $50 bucks, easy to find
    1951 3100
    1984 C10

  6. #86
    Join Date
    Nov 2003
    Location
    Denton Texas
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    I wonder if your truck was a Mexican import. A lot of the left over junk get put into the ones they intend to stay in Mexico. You also may just have one of the very first NBS V6 trucks imported into the US that they put the old leftovers into.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  7. #87
    Join Date
    Aug 2008
    Location
    North Texas
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    12,078
    Ummm....was it a V6? Then it had the 4-connector PCM like all the rest of the 1999's I rememeber.

  8. #88
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    Quote Originally Posted by RedHeartbeat View Post
    I wonder if your truck was a Mexican import. A lot of the left over junk get put into the ones they intend to stay in Mexico. You also may just have one of the very first NBS V6 trucks imported into the US that they put the old leftovers into.
    mexican??... really?? actually - i do remember seeing something about some 99 NBSs getting Vortec 5.7s down there. i actually considered doing that swap myself, but i'd've had to find a 99 or 00 OBS to pull it out of.

    actually, my truck is definitely American & was was built in the last half of the 99 run - february actually. i know it's American from the VIN. 1GTEK14W2XZxxxxxx
    1=made in the USA, Z=assembled in Fremont, CA

    Quote Originally Posted by GasGuzzler View Post
    Ummm....was it a V6? Then it had the 4-connector PCM like all the rest of the 1999's I rememeber.
    yeppers... that's why it's in this thread

    ps - that's the W in the VIN... but of course you know that
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  9. #89
    Join Date
    Aug 2008
    Location
    North Texas
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    Yeah but I didn't take the time to read the other seven pages over again.

  10. #90
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    just a little tidbit of info...

    found out today that (at least for 01 model 4.8/5.3) the 4l60 flexplate bolts & nv3500 flywheel bolts are, in fact, the same. they're also $3.xx each if you're unfortunate enough to have to buy new ones
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

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