MoparPartsGiant.com offers the wholesale prices for genuine 2008 Chrysler Pacifica parts. Parts like Heater Plumbing are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.8L, 6 Cyl 4.0L. Transmission: 4-Speed Automatic Transmission, 6-Speed Automatic Transmission.