Q: How do you replace the fuel pump/fuel level sending unit assembly in a fuel tank?A: After removing the fuel pump/fuel level sensor from the tank, you can replace the entire assembly or individual parts. Drain residual gasoline and place it on a clean, well-ventilated workbench. Check the strainer for clogging and replace if necessary. Unclip the fuel pump from the assembly. Reassemble in reverse order and reinstall in the fuel tank.