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  1. Duramax First Generation: 2001-2004 (LB7)
    Alright, another lb7 injector question. I have a 2002 Chevy Silverado 2500hd with the lb7 Duramax and 130,000 thousand miles, s&b cold air intake, bigger/louder exhaust, but stock fuel pump and filter set up. My truck does have some sort of tuning: setting one = stock two = tow heavy three =...
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