An ACDelco GM Original Equipment Mass Air Flow (MAF) Sensor is a key part of the engine management system, and is a GM-recommended replacement for your vehicle?s original component. The MAF sensor measures the amount of air entering the engine so that the engine control module can determine the amount of fuel to inject. This ensures the most efficient air/fuel mixture for the best fuel economy and power, while reducing harmful exhaust emissions. This original equipment mass air flow sensor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Measure the amount of air entering the engine so that the engine control module can determine the amount of fuel to inject GMrecommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function 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