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Thread: Gear ratio

  1. #1

    Default Gear ratio

    I have a 2003 Silverado Ext Cab with the 4.8L engine with a auto transmission and trying to find the gear ratio so that I can look up how much that I can tow.

    Where do I find this info ? If this information is embeded in the VIN does anybody have a link to a decoder to give me this info ?

    Or is this info on a metal tag on the truck somewhere ?

    Thanks in advance

  2. #2


    You can go to any Chevrolet dealership and tell them that you want a printout of everything on your vehicle. All you will have to do is give them the VIN. I did this a couple of weeks ago when I was getting ready to purchase my new truck. They didn't charge me anything to do this. The printout will tell you everything that you would want to know about your vehicle.

    I hope that this helps you out.

  3. #3
    Sr. Apprentice EKperformance's Avatar
    Join Date
    Oct 2008
    lake City Florida


    in the glove box there is a sticker with codes on it, and on this site there is a list of those codes and what they mean. you will find the ratio in those codes, for ex- GT4 is 3.73:1
    2002 silverado 4.3 5spd / off road y pipe, flowmaster split duals, K&N filter
    ported throttle body , ported heads and intake < all by me

  4. #4
    Legend tlperry68's Avatar
    Join Date
    Oct 2008
    Huntington Beach, CA


    You might also be able to find it on the door pillar. Mine says plain as day Axle : 3.79. If you can get your axle type do you need to know the capacity of your truck or are you good?
    Trevor - Huntington Beach, CA
    2007 GMC 2500 4X4

  5. #5

    Default Thanks

    Thanks for the info , that's all I need for now but stay tuned as I am sure there are more questions coming.

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