Clues to axle ratio Tahoe/Yukon?

Discussion in 'Engine & Drivetrain' started by Nitrostick, Jul 9, 2018.

  1. HiHoeSilver

    HiHoeSilver Away! Supporting Member

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    Yes, GU6= 3.42
     
  2. bldn10

    bldn10 Full Access Member

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    FWIW on the '02 generation 3.42 is GU6 and the 3.73 is GT4.

    I have the 3.42 and I cannot maintain speed up even relatively steep hills in 3 mode. It will kick down to 2nd and I hate that. Towing 3000# car on aluminum open trailer.
     
  3. Ken G

    Ken G TYF Newbie

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    Definately go with the 3:42's which are option code GU6, GU4 would be 3:08. On an LS, LT, LTZ the standard is 3:08 and you have to get the Heavy Duty Trailer Pkg w/ the JL1 controller to get the 3:42's, it all comes in that package. Z71's ALL have the 3:42 standard but you can NOT get the Heavy Duty Trailer Pkg which makes no sense in my opinion lol.
     

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