3.9L 239Cu. In. V6 GAS OHV Naturally Aspirated 14 5.2L 318Cu. In. V8 CNG OHV Naturally Aspirated 15 5.2L 318Cu. In. V8 GAS OHV Naturally Aspirated 15 5.9L 360Cu. In. V8 GAS OHV Naturally Aspirated 15