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gears how to tell what ones?

Discussion in 'GM Powertrain' started by jjjg_02, Dec 25, 2009.

  1. jjjg_02

    jjjg_02 New Member

    how do i find out what gears in my truck i looked on the door but it wasnt there. is it in the vin or something? the truck is a 03 2500hd 6.0
  2. azdrtdog

    azdrtdog Epic Member 5+ Years 100 Posts

    does the rear diff cover have a tag
  3. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    RPO code list in the glove box (assuming you can be certain it still has the factory installed ratio).

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