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Thread: Newbie - 5.3 Identification

  1. 10-05-2009 10:31 AM #1
    vintagesteel
    vintagesteel is offline Junior Member
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    Unhappy Newbie - 5.3 Identification

    Hello people! I am new to the LS game but am very excited to learn. I am in the very early stages of a 51 Chevy truck build up with of course an LS/4L60E
    motivation. I just purchased a 5.3 with 36k miles on it from an '05 Envoy Denali. I do not have the s/n of the vehicle yet but I have several numbers off of the block that I was hoping may help identify it as far as the still mystical codes I am starting to read about.(LS1, LQ4 and so on) Both numbers are on the driver side/rear of the block. Stamped on the block is T52322311. Cast in to the block is 12569513. Any help or direction to look at would be great.
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  2. 10-05-2009 03:59 PM #2
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    ducky
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    I'm not sure, But i have a 51 chevy that I will be building in the near future. make sure you document your build because I will def. reference it
    1951 3100
    1984 C10
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  3. 10-05-2009 04:17 PM #3
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    banker099
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    get a pen light and look in the spark plug hole and see if it has dished pistons or flat tops
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
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  4. 10-05-2009 04:33 PM #4
    vintagesteel
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    I've got a bore scope. I will take a look tonight and get back with you.
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  5. 10-05-2009 04:34 PM #5
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    banker099
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    Quote Originally Posted by vintagesteel View Post
    I've got a bore scope. I will take a look tonight and get back with you.
    dished = 5.3
    flat tops = 4.8
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
    Intro Radicalli's
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  6. 10-05-2009 06:24 PM #6
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    Botlfed
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    im pretty sure envoys only came with the 5.3....
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  7. 10-06-2009 06:41 AM #7
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    I thought that there would be a 5.3/4.8 stamped on the block as well?? At least that's the way mine is.

    2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive
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  8. 10-06-2009 10:23 AM #8
    vintagesteel
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    Ok...this just in. I can not seem to determine if the pistons flat or dished. If I had to guess I would say flat. I did find 5.3L cast in to the rear of the block and also discovered the block was aluminum. With this information I do believe I have a Gen IV LH6. I cant seem to find the stock horsepower number. I only want this to use as a baseline before adding a few go fast parts. From what I am finding out it appears there is a wide range of interchagability between the LS family engines. Thanks for everyone input. If you can add to my finding feel free.
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  9. 10-06-2009 01:24 PM #9
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    Botlfed
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    yes the envoy came with the l33 aluminum block 5.3 so you have a 5.3 my friend. they dont make an aluminum 4.8.
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    AZRAEL

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  10. 10-06-2009 03:49 PM #10
    nonnieselman
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    Thats a rare engine to find..
    good job.

    and he is right, they didnt make a aluminum 4.8.
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