GMPartsGiant.com offers the wholesale prices for genuine 2021 GMC Savana 2500 parts. Parts like Battery Mounting 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, 6 Cyl 4.3L, 8 Cyl 6.6L. Model Code: 3/4 TON CARGO SAVANA, 3/4 TON PASSENGER SAVANA.