The 5.9 Cummins is said to be one of the most reliable diesel engines, but that doesn't mean it can't benefit from upgrades. Here's what owners recommend.

But that's where Desert Power Wagons comes in. Desert Power Wagons Wants To Sell You A $300,000 Truck It won't be cheap. The truck seen here will run you more than $300,000. But ...

If you're sold on the 5.9 Cummins (and fair enough, it's a beast when it's right), aim for the 2003 to 2007 model years. These trucks use the high-pressure, common-rail injection system, ditching ...

Cummins and Ram claim that the switch to glow plugs is a result of changes in the engine layout and an attempt to improve ignition time.