Yeah, if you do smell gasoline at fill up, perhaps somewhere in the plumbing at the top of the gas tanks might have a leak somewhere. If that is the case, it would be hell trying to find out where exactly the leak might be at without dropping the gas tanks, however. Which looks like it would be a real pain in the butt job to do.
I replaced the fuel pump in the C5Z but luckily it mounted from the back instead of from the top. But it was still a very tight fit maneuvering the old and new pump even then without dropping the tank any.
Had to replace the fuel pump in Connie's pickup truck a little while back, which also mounts from the top, but in that case I just lifted the bed of the truck off of the frame, and got to it that way.
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