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  1. Powertrain ? Engine, Transmission &...
    Greetings All, Longtime Duramax convert here. Just bought a 2012 3500 DRW Tow Max (4.11) 6.7 Longhorn and am wondering how the powertrain (ie tranny) will hold up to a bullydog tuner. I ran tuners on my previous duramaxes and all was fine except for 1 limp mode occurrence as a result of a stuck...
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