GMPartsGiant.com offers the wholesale prices for genuine 2014 Cadillac CTS Coupe parts. Parts like Roof Headliner are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0L, 6 Cyl 3.6L, 8 Cyl 6.2L. Model Code: 2 DOOR COUPE, V 2 DOOR COUPE.