Quoted from Darcy:We get many older Chev and GMC trucks that come in with the hole cut out of the box floor. Just to access the fuel pump/sender unit. Most leave the hole open. Some will have a mat covering the hole. Some have silicon goop to act as glue to hold the cut piece in place..
I understand this "fix" but for the trouble (and it always doesn't work) why people don't just lift the bed to change the pump???
In a somewhat related story, a family member called me up complaining that his Suburban wouldn't start. I told him to go outside and kick the thing. He doubted my advice but as I listened, he did exactly what I told him, I told him to kick the gas tank in the center, then try to start it. He was amazed that it worked. With the fuel pumps in the tank, the cheap gas fouls the contacts of the pump and usually the sending unit too. Won't "fix" the problem everytime but as long as it does it once. BTW, I am a strong believer in using a bottle or two of Techron in the gas tank especially when I know the car will be sitting for a couple days. It seems to do a better job than most of cleaing the sending units and pumps.
BTW, have seen some clowns drop the tank on many of the older GM cars without looking to see if there is a trap door in the trunk. Most of the doors are gone now but talk about an easy swap when the opening is there.