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Thread: GMC/Chevy gear ratio's

  1. #1
    Join Date
    Oct 2009
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    Danville PA.
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    Lightbulb GMC/Chevy gear ratio's

    Here are some ratio codes found in some 4X4 GMC Chevy truck and Suburban's
    I found these while surfing for info on a Suburban I had acquired....

    Check the SIPI sticker for one of these codes. Located in either in the clovebox or in the driver's door jam.

    GQ1 -- AXLE REAR, STD RATIO
    GT4 -- AXLE REAR, 3.73 RATIO
    GT5 -- AXLE REAR, 4.10 RATIO
    GU4 -- AXLE REAR, 3.08 RATIO
    GU5 -- AXLE REAR, 3.23 RATIO
    GU6 -- AXLE REAR, 3.42 RATIO
    G80 -- AXLE REAR, LIMITED SLIP (POSITRACTION)

    HC4 -- AXLE REAR, 4.56 RATIO
    Thanks Steve


    'Stop telling God how big your storm is.
    Instead, tell the storm how big your God is!'


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