How do you change the fuel pump in a 1986 Buick Electra?

To change the fuel pump in a 1986 Buick Electra, first ensure the vehicle is safely lifted and secured. Disconnect the negative battery terminal, then drain the fuel tank and remove it to access the fuel pump, which is located on top of the tank. Disconnect the electrical connector and fuel lines from the pump, then unbolt and remove the old pump. Install the new pump by reversing the process, making sure to reconnect the fuel lines and electrical connector securely before reassembling and reinstalling the fuel tank.