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Gear Ratio Codes

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by TXsizeK5, Mar 11, 2002.

  1. TXsizeK5

    TXsizeK5 1/2 ton status

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    Can anyone tell me the codes in teh glove box to figure out waht kinda gears ya got in your axles? Thanks
     
  2. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Here you go.......

    GU4 - 3.08
    GU6 - 3.42
    GT4(or 5X1) - 3.73
    GT5(or GT8) - 4.10
    G80- Limited Slip

    Hope that helps. Depending on your RPO sheet all the codes may start with "1".....
     
  3. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    There is also a code for 3.23 (which my truck had originally....look at my pictures section for pics and part numbers for the ring and pinion....but the glovebox was replaced so I do not have the code, but I will see if I can find it). Another member posted it once, but I lost my link to it.
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    The code for 3.23s is GU5.
     

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