1 generation [redesign]
2003–2020
- 4.3 AT 1500
- 4.8 AT 2500
- 4.8 AT Extended 2500
- 4.8 AT Flexfuel 2500
- 4.8 AT Flexfuel Extended 2500
- 4.8 Flexfuel AT 3500
- 4.8 Flexfuel AT Extended 3500
- 5.3 AT 1500
- 5.3 Flexfuel AT 1500
- 5.3 Flexfuel AT AWD 1500
- 6.0 AT 2500
- 6.0 AT 3500
- 6.0 AT Extended 2500
- 6.0 AT Extended 3500
- 6.0 AT Flexfuel Extended 2500
- 6.0 Flexfuel AT 2500
- 6.0 Flexfuel AT 3500
- 6.0 Flexfuel AT Extended 3500
- 6.6 TD AT 2500
- 6.6 TD AT 3500
- 6.6 TD AT Extended 2500
- 6.6 TD AT Extended 3500