GMPartsGiant.com offers the wholesale prices for genuine 2011 Chevrolet Express 2500 2WD parts. Parts like Fuel Tank-Rear Unit are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 8 Cyl 4.8L Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L Diesel. Model Code: 3/4 TON CARGO EXPRESS, 3/4 TON PASSENGER EXPRESS.