GMPartsGiant.com offers the wholesale prices for genuine 2017 GMC Savana 2500 parts. Parts like Fuel Fired Heater Assembly are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.8L Diesel, 8 Cyl 4.8L Flex, 8 Cyl 6.0L Flex. Model Code: 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER SAVANA.