GMPartsGiant.com offers the wholesale prices for genuine 2009 Pontiac Montana parts. Parts like Radio 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 3.9L, 6 Cyl 3.9L Flex. Model Code: CROSSOVER SPORT VAN, CROSSOVER SPORT VAN EXTENDED.