Equip your vehicle to be Ready for the Road Ahead , with the Delco Remy 28SI 12V 200A Pad Mount Alternator, a key component that supplies a stable source of power to all of its electric accessories. By pairing with the serpentine belt, this replacement alternator converts the mechanical energy from the engine into a usable current of electricity, which is then stored in the battery. Built with rigorously tested wiring to keep your power steering, radio, headlights, and more operating at their best. FleetPride is your First Click in Heavy Duty .