GMPartsGiant.com offers the wholesale prices for genuine 2024 Cadillac XT6 parts. Parts like Shift Control/Automatic Transmission 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.