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  1. Duramax First Generation: 2001-2004 (LB7)
    just got everything back together on my LB7 brand new FPR. fired the truck up and its looping /surging at idle when it is in P,R,N,D,3,2,and in 1st gear and it goes away when i accelerate. at idle rpm cage jumps up and down and truck shakes really bad
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