MoparPartsGiant.com offers the wholesale prices for genuine 2015 Ram ProMaster 1500 parts. Parts like Rear Bumper, Fascia are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 3.0L Diesel, 6 Cyl 3.6L. Transmission: 6-Speed Automatic Transmission.