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  1. #1

    Default Differential gear ratio

    Greetings all...

    I recently purchased a new Avalanche. Am trying to figure out the rear end gear ratio. I tried chasing the info down awhile on my own before "starting a thread". All paths lead to the glove box sticker (RPO) but that's still undecipherable to me!!! HELP please!!!

    Thanks!!

  2. #2

    Default

    Here are the common gear ratios, currently being used by GM, for the trucks:
    GV3 = 3.08
    GU6 = 3.42
    GT4 = 3.73
    GT5 = 4.10

    And, as you suggest, the code is on the glove box door sticker.

    Here is a site that will let you look up the other codes:
    http://www.rpocodes.com/


    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  3. #3

    Default

    Thank you SO MUCH Ray!! Exactly what I needed!!!
    Happy 4th!

    - - - Updated - - -

    The truck is new... I do have the window sticker but the actual "ratio" isn't on it... Not sure why (?)

    - - - Updated - - -

    Thank you!!

  4. #4
    Jr. Mechanic
    Join Date
    Apr 2009
    Location
    North Dakota
    Posts
    130

    Default

    I looked up a bunch of Avalanche window stickers online and they were all either 3.08 or 3.42. Same 7200# GVWR.
    2013 Escape Titanium 4WD

  5. #5

    Default

    If you go to chevrolet.com and "Build" a 2013 Avalanche, the standard axle ratio is 3.08, while you can get an optional 3.42 ratio. This leads me to believe that those are the only axle ratios available to the Avalanche.

    2013 Silverado LTZ White Diamond Crew Cab


    Mods:
    Advent OGM1 Navigation
    Husky Liners GearBox Underseat Storage
    Airaid MIT
    EGR Rail Caps
    K&N Air Filter
    Flowsound 40 Muffler
    Hypertech Max Energy Tune (only top end limiter removed and AFM disabled)
    Chrome Tailgate Handle Cover
    TonnoPro HF-155 Tonneau Cover
    WeatherTech Front and Rear Splash Guards
    Husky Liners X-Act Contour Floor Liners
    WeatherTech Side Window Deflectors

  6. #6

    Default

    Quote Originally Posted by DeeTee View Post
    Greetings all...

    I recently purchased a new Avalanche. Am trying to figure out the rear end gear ratio. I tried chasing the info down awhile on my own before "starting a thread". All paths lead to the glove box sticker (RPO) but that's still undecipherable to me!!! HELP please!!!

    Thanks!!
    Was the Avalanche new or just "new to you". If new, the axle ratio would be on the window sticker.

    2013 Silverado LTZ White Diamond Crew Cab


    Mods:
    Advent OGM1 Navigation
    Husky Liners GearBox Underseat Storage
    Airaid MIT
    EGR Rail Caps
    K&N Air Filter
    Flowsound 40 Muffler
    Hypertech Max Energy Tune (only top end limiter removed and AFM disabled)
    Chrome Tailgate Handle Cover
    TonnoPro HF-155 Tonneau Cover
    WeatherTech Front and Rear Splash Guards
    Husky Liners X-Act Contour Floor Liners
    WeatherTech Side Window Deflectors

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