GMPartsGiant.com offers the wholesale prices for genuine 2014 Chevrolet Silverado 2500 HD 2WD parts. Parts like Antenna are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L Diesel. Model Code: CREW CAB 6'6" BOX 3/4 TON, REGULAR CAB 3/4 TON.