| Yr | Cyl | Desc | UNIV | DF | PK | | 1998-1999 | 8 | All models with 5.0L or 5.7L engine, except California | 2517 | N/A | N/A |
| 1996-1997 | 8 | All models with 5.0L engine, except California | 2517 | 9649 | N/A |
| 1996-1997 | 8 | All models with 5.7L engine, except California | 2517 | N/A | N/A |
| 1996-1997 | 6 | All models with 4.3L engine, except California | 2517 | 9649 | N/A |
| 1995 | 8 | All models with 146" wheel base | 2907 | N/A | N/A |
| 1995 | 8 | All models with 5.0L or 5.7L engine, except 146" wheel base | 2907 | 9616 | N/A |
| 1995 | 6 | All models with 4.3L engine | 2907 | 9616 | N/A |
| 1992-1994 | 8 | All models with 5.7L engine under 9000lbs GVW | 8007 | 9184 | PK-20 |
| 1992-1994 | 8 | All models with 5.7L engine over 9000lbs GVW | 10907 | 10903 | N/A |
| 1987-1994 | 8 | All models with 5.0L engine | 2906 | 9002 | PK-19 |
| 1987-1991 | 8 | All models with 5.7L engine over 9000lbs GVW | 10907 | 10903 | N/A |
| 1987-1991 | 8 | All models with 5.7L engine under 9000lbs GVW | 8007 | 9184 | PK-20 |
| 1985-1994 | 6 | All models with 4.3L engine | 2906 | 9002 | PK-19 |
| 1983-1986 | 8 | All models | 8006 | 9002 | PK-19 |
| 1983-1984 | 6 | All models with 4.3L engine | 6906 | 4001 | PK-19 |
| 1979-1982 | 8 | All models with 400 cid | 8006 | 9002 | PK-19 |
| 1979-1982 | 8 | All models, except 400 cid | 6906 | 4001 | PK-19 |
| 1975-1976 | 8 | All models with 5.7L engine and converter | 6906 | 4001 | PK-19 |
| 1975-1982 | 6 | All models with 4.3L engine | 2906 | 9002 | PK-19 |