How do you remove a fuel pump in a 1983 Buick riviera?

To remove the fuel pump from a 1983 Buick Riviera, first, ensure the vehicle is off and the battery is disconnected. Access the fuel pump by removing the rear seat to reach the fuel tank access panel. Disconnect the fuel lines and electrical connectors from the pump, then unbolt and remove the pump assembly from the tank. Finally, replace the old pump with a new one and reassemble the components in reverse order.