Ok, I have a 2001 silverado 4x4 4.8 liter V8. I smelled fuel under the truck one day and found a nightmare. A couple of years ago I replaced brake lines going down the drivers side frame. Well, now its the fuel lines. I will explain. There are 3 fuel lines going from the fuel tank going across from the frame. There are GM plastic fuel lines coming from the top of the fuel tank. Those plastic fuel lines come to end and have plastic connections(fittings) with clips. Inside those is where metal fuel lines plug in. Sounds strange that GM would use plastic fuel line, than after using plastic fuel line they have plastic connectors and from those plastic connectors turns to metal fuel lines. I really don't like anything that has to do with the setup that I found. I found that the rotted fuel line rotted at the plastic fitting connection. So, to be clear, I removed the damaged areas on 2 of the three fuel lines. One line is the fuel filter line, the thicker of the two lines rotted. I "bypassed" the rotted fuel line, cut out the damaged "plastic ****" from the tank side and purchased a double ended "ribbed" couplink, one end I heated up, pressed into the plastc fuel line into the fuel tank side, other end of the ribbed fitting I pressed on rubber fuel line(that I purchased) and clamped it down with 2 hose clamps, other end I purchased small fuel line end, one end had the threaded male bolt that threaded into my new fuel filter, the other end accepted the other end of rubber fuel line double clamped again. Did the Same thing on 2nd rooted fuel line, bypassed metal areas rotted and used the ribbed couplink.... HERES THE PROBLEM, AT EACH CONNECTION END WHERE THE FUEL LINE AND HOSE CLAMPS ARE LOCATED... IT LEAKS!!!!!!!!!! IT IS DRIVING ME NUTS, I SNUG UP THE CLAMPS BUT IT STILL LEAKS....... ANY ONE HAVE A SUGGESTION ON HOW TO RESOLVE THIS TOUGH SPOT, TOUGH FUEL LINE REPAIR? ITS TOUGH TO BEND THE METAL LINES FROM THE REPAIR ENDS WHICH ARE NEAR THE FUEL FILTER, UP AND OVER TO THE FUEL TANK AREA WHERE I NEED TO HOOK UP TO. So again 2 fuel lines rotted, tried to bypass with fuel line, no way hosay!! im thinking stainless flex lines like you see on a toilet supply line where I can run the fuel line needed without nightmare bends that will never bend up and over frame to where I need to go....... what a mess..... thanks for any input!!