GM Genuine Parts Turbocharger Wastegate Solenoids are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These solenoid valves are used by the engine control module (ECM) to control engine boost pressure and regulate opening of the turbocharger wastegate. 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).