MoparPartsGiant.com offers the wholesale prices for genuine 1988 Dodge D150 parts. Parts like Alternator 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, All Engines. Transmission: 4-Speed Manual Transmission, 5-Speed Manual Transmission, Automatic Transmission.