GM Genuine Parts Parking Brake Shoes are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Parking brake shoes are curved friction material used in parking brakes. The friction-enhancing material is bonded and/or riveted to a steel backing.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). ? WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov