MoparPartsGiant.com offers the wholesale prices for genuine 2001 Dodge Ram Van parts. Parts like Rear HEVAC Unit are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.9L, 8 Cyl 5.2L, 8 Cyl 5.9L. Transmission: 3-Speed Automatic Transmission, 4-Speed Automatic Transmission.