In 2022 GM began a transition to high-efficiency generators. High efficiency generators support the high electrical loads of today's vehicles The wire fusing and wire gauge size for the generator has been specifically engineered for the GM vehicle application The generator is an active device which has stringent noise and vibration requirements in the GM vehicle application. Fan sizes and bracketry are specifically designed to help prevent noise and vibration GM calibrations are designed for the GM OE generator from a regulator and torque standpoint Remanufactured GM OE generators are also available, depending on vehicle application Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE) GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle GM regularly updates production and service part designs to integrate new materials and technologies