GMPartsGiant.com offers the wholesale prices for genuine 2004 Chevrolet Express 2500 4WD parts. Parts like Blower Assembly are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L. Model Code: 3/4 TON CARGO EXPRESS.