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transmission slipping?
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  1. General Discussion
    Hey guys, new here and new to the Duramax.. I bought a 2016 Denali 150k miles, PPEI tunes, 5 position SOTF Fass fuel system, S&B intake.. of course it felt great in the test drive, after driving the truck a while I’m noticing a skipping or inconsistent pulling if the truck is under a slight...
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