I'm in a bit of a jam and I need a question answered. I have a 92 suburban 2500 with a 7.4 and the fuel pump is bad I dropped tank and while doing that I managed to break the plastic vents on either end on the top of the tank. My question is how do they come off the tank and are they still avaible from chevy. It's sat and the dealers are not opened. Thanks in advance for the help.