Genuine GM Black Trailer Brake Control Switch Assembly 84108373 is a genuine OEM trailer brake controller switch assembly designed for direct replacement in Chevrolet and GMC vehicles. It is a black switch assembly that includes only part reference #6 on the diagram. This product is compatible with various models from 2016 to 2022 and comes with a 1-year manufacturer warranty. It replaces part number 23145874 and is an essential part for towing parts and accessories.