Look at the 8th digit of your VIN to determine which engine you have. K =3.7L Gas X =3.9L V-6 gas SMPI N =4.7L V-8 gas Y =5.2L V-8 gas SMPI T =5.2L V-8 compressed natural gas (MPI) D =5.7L V-8 gas (SMPI) Z =5.9L V-8 gas (SMPI) light duty 6 =5.9L I-6 Diesel C =5.9L I-6 High Output Diesel W =8.0L V-10 gas (MPI)
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