GMPartsGiant.com offers the wholesale prices for genuine 2018 Cadillac XT5 2WD parts. Parts like Cover/Rear Compartment 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.