MoparPartsGiant.com offers the wholesale prices for genuine 1999 Dodge Grand Caravan parts. Parts like Engine Oil Cooler are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0L, 6 Cyl 3.3L, 6 Cyl 3.8L. Transmission: 4-Speed Automatic Transmission.