Cummins diesel engines ... and while revered, the 5.9-liter Cummins does have some notable weaknesses, as described by owners. Examples of widely reported problems include the killer dowel pin ...

In 2003, the popular heavy-duty truck offered the Cummins third generation of engines, the 5.9-liter inline-six-cylinder diesel ... to CarComplaints.com. One problem was the injectors not properly ...