GM Genuine Parts Windshield Wiper Blade Refill Sets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These refill sets are inserted into your GM vehicles wiper blade. They are used as an alternative to * the complete blade. 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).