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

  1. #141
    Join Date
    Aug 2009
    Location
    Humble, TX
    Posts
    91
    started diconnecting transmission plug-ins and took ac system out last night....... today i'm finishing unplugging everything and taking motor out

    i'll start a thread when i get time on my build..... hopefully drop the new one in tomorrrow

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI

  2. #142
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
    13,138
    How many miles/what are you gonna do with your old 4.3?
    1951 3100
    1984 C10

  3. #143
    Join Date
    May 2009
    Location
    hot & windy
    Posts
    1,117
    Quote Originally Posted by DennisG_02Silverado View Post
    started diconnecting transmission plug-ins and took ac system out last night....... today i'm finishing unplugging everything and taking motor out

    i'll start a thread when i get time on my build..... hopefully drop the new one in tomorrrow
    good luck!

    hope your computer's good
    Last edited by zebra; 11-07-2009 at 11:32 AM.
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  4. #144
    Join Date
    Aug 2009
    Location
    Humble, TX
    Posts
    91
    the v6 has a lil over 147k, i might have a buyer for it, but not sure yet

    yea i'm supposed to get my pcm back tomorrow so hopefully it is. wasnt planning on it but i ended up pulling my tranny and making a mess

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI

  5. #145
    Join Date
    Aug 2009
    Location
    Humble, TX
    Posts
    91
    Swap is done and truck is a dawg right now

    plus my injectors are to small

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI

  6. #146
    Join Date
    Oct 2009
    Location
    Mesa
    Posts
    25
    why do you say your injectors are too small? didn't you use the stock injectors that came in the 5.3 intake? I have my 5.3 all ready to put in with the fuel lines installed and i new paint job. Just need to basically pick a weekend and install it. Can i use my stock engine coolant sensor for the electric fans or will the computer get mad and throw a code because i have it unplugged and wired into my own fan wiring harness.

  7. #147
    Join Date
    Aug 2009
    Location
    Humble, TX
    Posts
    91
    i'll get a thread going bout my swap soon.... getting my lt's and ory this week. i had wheatley tune my truck, and my injector cycle duty is at 109% so i needa get bigger injectors.

    * 2002 Chevy Silverado RCSB w/ 4.3 to 5.3 swap
    Installed: McGaughys full 2/4|HD hood/Z71 Airdam|Circle D Built Trans & 3200 stall|34" fans/radiator|True Trac w/ 3.73s|V8 Swap w/ Milled Heads and Comp valvetrain|Custom Grind 22x/23x Cam|Pacesetters LTs & ORY|Magnaflow|Wheatley Tune
    Future Mods: Paint (Sunset Orange Metallic), milled 243s, possibly a 6.0 with either turbo or procharger
    * 2008 GMC CC Texas Edition: stock with CAI

  8. #148
    Join Date
    May 2009
    Location
    hot & windy
    Posts
    1,117
    what year 5.3 did you get? i believe the 99 models had smaller injectors than the rest
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

  9. #149
    Join Date
    Oct 2009
    Location
    Mesa
    Posts
    25
    has anyone who has already done this swap had any issues with the fuse pannel. Can the stock v6 one work?

  10. #150
    Join Date
    Dec 2007
    Location
    wichita falls, tx
    Posts
    3,067
    yes you can use the factory fuse box...
    ↓↓↓click pic to go to garage↓↓↓

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

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