MoparPartsGiant.com offers the wholesale prices for genuine 2019 Jeep Grand Cherokee parts. Parts like Engine Assembly And Service Long Block 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 Diesel, 6 Cyl 3.6L, 8 Cyl 5.7L, 8 Cyl 6.2L, 8 Cyl 6.4L. Transmission: 8-Speed Automatic Transmission.