General Motors’ 6.6-liter Duramax LB7 was a state-of-the-art V8 diesel engine with four-valves-per-cylinder producing 235 to 300 hp and 500 to 520 lb-ft of torque. In addition to a turbocharger ...

Most trucks powered by diesel engines fall into the heavy-duty class, which makes them three-quarter-ton and one-ton models that are larger and much more capable than their half-ton counterparts.