GM Genuine Parts Power Brake Booster Lines are designed, engineered, and tested to rigorous standards, and are backed by General Motors. 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). A brake booster line utilizes the vacuum produced by the vehicle's engine to supply energy to the power brake booster, which assists the pedal input of the driver, and is a GM-recommended replacement for your vehicle's original components. 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).