GMPartsGiant.com offers the wholesale prices for genuine 2005 Chevrolet Express 3500 parts. Parts like A/C Module Assembly 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, 8 Cyl 6.0L. Model Code: 1 TON CARGO EXPRESS, 1 TON COMMERCIAL/RV CUTAWAY, 1 TON PASSENGER.