If you're replacing your first Buick Fuel Pump, purchase a repair manual along with your replacement pump.
The truth of the matter is that the Genuine Part seldom just fails.
You'd never know it based on the price your local dealership parts counter tries to charge you for a new Car Part, though.
The Buick Fuel Pump, whether it sits in the gas tank or along the frame rails, is just an electric motor attached to a couple of gears that pump the fuel.