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dumb question is a 2003 vortec a ls1

This is a discussion on dumb question is a 2003 vortec a ls1 within the General Help forums, part of the LSx Technical Help Section category; I would like to know if a 5,3 2003 vortec is called a ls1...

  1. #1
    Junior Member chevy865.3vortec's Avatar
    Join Date
    Feb 2011

    86 chevy pickup

    dumb question is a 2003 vortec a ls1

    I would like to know if a 5,3 2003 vortec is called a ls1

  2. #2
    Veteran 0rion's Avatar
    Join Date
    Aug 2005

    98 Formula
    06 duramax

    no.....they're in the family though. 2003 iron block 5.3's are LM7's and aluminum 5.3's are LM4's. I *believe* the vortec's were the iron block LM7's in the trucks but I'm not positive on that.

  3. #3
    Senior Member 98maro's Avatar
    Join Date
    Feb 2010
    north bay california

    00 camaro ss M6 #6695

    What are your plans bro. Are you looking for an ls1 for your truck ?
    00 ss blk m6 " STOCK" strano springs, slp bilstein shocks, adj LCA, adj panhard bar, relocation brackets, 2 point SFCs welded,OEM zo6 rims black, magnaflow exhaust, CME exhaust,E/cutout, slp grille, custom front plate mount, HIDs, whistler mod, side moldings delete, slp air lid, ported and polished TB, strut tower brace, 3.73s gears, and some other parts to list!
    next to come,4.10s,ls7 clutch, ms3 or 228r cam, ported 243s, ls6 intake, ls6 oil pump. ls2 timing chain, longtube headers no cats, with a tune..
    02 tahoe Z71 blacked out
    00 jeep grand Cherokee limited on 22s.
    07 Dodge Charger R/T Inferno Red, Sold
    98 z28 red m6 sold
    07 zx6r ninja flat/black sold
    08 zx6r ninja sold

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