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Gear Ratio RPO code? HELP!

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by JTx9, Jul 25, 2011.

  1. JTx9

    JTx9 New Member

    just bought myself an 05 Sierra 1500 z71 :) 95k. Still smells new btw.
    I hooked up my programmer out of my old 2500 and went to set the tire size/ gear ratoio and it started my gear ratio out at 4.11 and If I remember correctly it started out on my 2500 at 3.73. So I'm wondering if in fact it does have 4.11s. I know you'd have to of special ordered one or by the grace of god had a dealer smart enough to order it with 4.11's.

    So, Which RPO code tells me my gear ratio?
  2. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Gu5=3.23 gu6=3.42 gt4=3.73 gt5=4.10

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