GM Genuine Parts Vapor Canister Vent Solenoids are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These solenoids communicate with the valve to open and close, allowing air to pass in and out of the vapor canister vent. 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).