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  1. #1

    Default truck drops to 4cyl

    do all new silverados do econ mode im just wondering if mine does

  2. #2
    Legend

    Join Date
    Feb 2008
    Location
    Red Wing, Minnesota, United States
    Posts
    3,356

    Default

    just run your VIN number it will tell you from your specific engine code
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

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