GMPartsGiant.com offers the wholesale prices for genuine 2008 Pontiac Montana parts. Parts like Suspension/Rear 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.