GM Genuine Parts Refurbished Engine Control Modules are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Refurbishing GM Genuine Parts Engine Control Modules involve returning the failed part to a factory certified repair facility for cleaning, inspection, and diagnosis. Any faulty components are identified and replaced when necessary, and the repaired unit is tested again to ensure it functions to GM specifications. In addition, refurbishing also benefits the environment by returning components back into service rather than processing as scrap or simply disposing of them. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).