ACDelco GM Original Equipment Brake Master Cylinder is a hydraulic pump mounted to the brake booster and contains a reservoir that holds brake fluid. This original equipment brake master cylinder has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Product Features:Pressure tested to ensure safe and confident brakingMeets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and qualityGM-recommended replacement part for your GM vehicle's original factory componentOffering the quality, reliability, and durability of GM OEManufactured with GM Original Equipment specification for fit, form, and function
