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My truck has metal piping for the filler neck. GM stamping on them too. I've never seen them on other trucks.
Boone, thanks for taking the time to get that pic. Its encouraging to me that something like this even exists. I can tell you for sure that this would not work on my short bed. I wonder if they make something like that for a short bed.Like what was said before if I do that though I run the risk of having them just put a hole in the tank. the only way I could figure would be to enclose the entire tank in sheet metal but then they would pry off the gas cap. I hate to just roll over and make it easy for them but that might be what I have to do.I hate giving in to the scum of the earth.
I say you need a couple of friends. Smith and Wesson and 45.