GM Genuine Parts Engine Oil Cooler Hose Assemblys are designed, engineered, and tested to rigorous standards, and are backed by General Motors. The oil cooler is the radiator for your engine oil, the component that cools the oil after it has circulated throughout the engine and collected heat. The oil cooler hoses are a connection between the cooler and the engine. The assembly allows the oil to be circulated in a continous loop between the cooler and engine and provides flexibility to handle the movement of the engine. 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).