GMPartsGiant.com offers the wholesale prices for genuine 2017 Cadillac XT5 AWD parts. Parts like Rear Seat Mounting 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.