MoparPartsGiant.com offers the wholesale prices for genuine 2010 Dodge Grand Caravan parts. Parts like Extension are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.3L, 6 Cyl 3.6L, 6 Cyl 3.8L, 6 Cyl 4.0L. Transmission: 4-Speed Automatic Transmission, 6-Speed Automatic Transmission.