How to change a fuel pump on a Ford E350 cutaway truck. My fuel gage sensor is not working also in my truck by changing the fuel pump you also change the sensor. Changing a fuel pump is a very simple job. Flooring on my truck are from woods. I see people cut the floor in a van on youtube to change their fuel pump but, I don't recommended. For van and car just drop the gas tank. My truck has separate cab.