ive got a 01 2500hd with the 6.6 its got 164k ,im the orig owner,starts right up first thing in the morn. but after it warms up its a hard to a no start condition ,so i insalled a new primer pump & rubber fuel lines it ran perfect for 2 days then back to the same problem ,so then i installed a rapture fuel pump so its getting the fuel but the condition still happens ,i was driving it & check engine light came on code p0093 fuel system leak -large ,no smoke coming out the exhaust, no fuel in the oil ,no external fuel leaks ,im thinking its suckin air from ?? IDK somwhere , any help would be appreciated. I had new injectors & head gaskets insalled at 120 k , thanks again ,..