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Thread: RPO Codes For Rear Gear Ratio

  1. #46
    Registered User 88Nightmare's Avatar
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    theres a VIN number on the RPO sticker. I should compare that to my title
    2007 Chevy Trailblazer SS AWD
    1987 Chevy Blazer Sport 4x4

  2. #47
    Registered User 88Nightmare's Avatar
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    well I compared it to my title and it matches. I wrote down all my RPO codes and found a website so I can decode them. Most, if not all of them were accurate, and the one I came across that decoded the gear ratio was H04, and according to that site, it says I have 4.11 gears...... Did the 1st gen blazers even come with 4.11's?
    2007 Chevy Trailblazer SS AWD
    1987 Chevy Blazer Sport 4x4

  3. #48
    Zombie Killer 6SpeedBlazer's Avatar
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    yes s-series got 4.10's

    if i had to guess i would say its a 4 cylinder or 2.8 most likley mated to an auto transmission

  4. #49
    Registered User 88Nightmare's Avatar
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    2.8 auto :D
    2007 Chevy Trailblazer SS AWD
    1987 Chevy Blazer Sport 4x4

  5. #50
    Registered User SportS15's Avatar
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    wow, i just checked mine, i have a GT4 which is 3.73 rear
    1988 S10 SFX 2.5L 5speed: Daily:boink:
    1991 GMC S15SOLD
    Quote Originally Posted by blazinmt View Post
    Nah, tweed is timeless (kinda like how farts will always be funny). I love a nicely done tweed interior.

  6. #51
    Registered User SportS15's Avatar
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    my new 88' S10 tht i just bought says GQ1 GT4...tht means its an open diff with 3:73 gears....so its not even limited slip posi? cuz my old S15 was a GT4 and she locked both wheels somtimes....so this one wont?
    1988 S10 SFX 2.5L 5speed: Daily:boink:
    1991 GMC S15SOLD
    Quote Originally Posted by blazinmt View Post
    Nah, tweed is timeless (kinda like how farts will always be funny). I love a nicely done tweed interior.

  7. #52
    houston-streets.com vortec owner's Avatar
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    i got the gu6 code 3.42's

  8. #53
    Registered User
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    where are the rpo codes in a 1992 bravada? its not in the glove box it dont even look like there was a sticker there

  9. #54
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    limited slip differential

    my differential has never had limited slip action, but my glove box rpo code shows G80. Is it likely broken, or just an open differential. I bought it used.

  10. #55
    5.7L VORTEC 350 blazin4low's Avatar
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    could be swapped or it's the good ole gov-lock that doesn't like to spin both wheels.....you can try to pump the brake once while power braking it to see if it will free the other wheel to spin
    http://i158.photobucket.com/albums/t114/VortecBlazer/sidredo.jpg
    Tuned by Bland Tuning
    Transmission built by Transbuilderguy on FSC!
    Marine Intake swap by me

  11. #56
    Omaha Stylie!! 87SBLAZER's Avatar
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    GQ1, GU6 in my 87 blaze...time for an upgrade im thinkn

  12. #57
    hotrods10
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    Cool rpo codes

    i just had a guy send me a complete list of almost every code by gm 102 pages. i think it will be big help in my junk yard search

  13. #58
    Senior Member 91GMCJimmy's Avatar
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    any links to a website to decode the rest of the codes all thats on my sticker is gu6

  14. #59
    the original lsteggy tunerman20's Avatar
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    you can try

    http://www.rpocodes.com/

    or

    http://www.marshu.com/images-website...-car-codes.pdf

    I really recommend the second one tho

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