In 2003, the popular heavy-duty truck offered the Cummins third generation of engines, the 5.9-liter inline-six-cylinder diesel. Another change was a switch to 24-valves over the previous 12-valve ...
6.4-liter gasoline V-8 engine with 429 pounds-feet of torque; 430-hp, 6.7-liter Cummins turbo-diesel inline six-cylinder with 1,075 pounds-feet; eight-speed automatic transmission; rear- or four ...