How do you remove the fuel pump on 1988 Chevrolet s10 once I am to the fuel pump?

In order to remove the fuel pump you must lower the fuel tank enough to give you access. Another solution is to disconnect the bed and slide it rearward enough to gain access. Neither solution is perfect but you have no other choice. Once you have access to the pump, clean the area around the pump to prevent dirt/rust from entering the tank when you remove the pump. You don't want dirt getting in the tank! Once the area has been thoroughly cleaned remove the lock ring holding the pump assembly into the tank and remove the pump assembly.