GMPartsGiant.com offers the wholesale prices for genuine 2021 Cadillac CT4 parts. Parts like Engine Assembly-Camshaft Cover & Coil 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, 4 Cyl 2.7L. Model Code: LUXURY SEDAN, SEDAN, SPORT SEDAN, V-SERIES SPORT SEDAN.