GM Genuine Parts Sunroof Sunshades are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sunshades slide open or closed, concealing your vehicle's sunroof glass. This allows the preferred amount of sunlight to enter through the sunroof of your vehicle. 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).