GMPartsGiant.com offers the wholesale prices for genuine 2023 Cadillac XT6 parts. Parts like Communication System are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.0L, 6 Cyl 3.6L. Model Code: BASE X-OVER 4DOOR, LUXURY X-OVER 4DOOR, SPORT X-OVER 4DOOR.