GMPartsGiant.com offers the wholesale prices for genuine 2015 GMC Savana 2500 parts. Parts like Automatic Transmission 2-6 Clutch 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 Flex, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.6L Diesel. Model Code: 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER SAVANA.