GMPartsGiant.com offers the wholesale prices for genuine 2018 Cadillac XT5 2WD parts. Parts like Fuel Supply System are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.6L. Model Code: CROSSOVER 4 DOOR, LUXURY CROSSOVER 4 DOOR, PLATINUM CROSSOVER 4DOOR, PREMIUM CROSSOVER 4DOOR.