GM Genuine Parts Replacement Horns are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Activated within your vehicles steering wheel, the GM Genuine Parts Replacement Horn will make an audible noise at the front of your vehicle to signal or alert other drivers. 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).