The 6.7 Cummins and 6.6 Duramax diesel engines are both reliable and solid, but they do differ in some ways. Here's the difference between the two.

The initial LB7 Duramax that was released in 2001 was a major step up from GM's outgoing 6.5-liter diesel, introducing groundbreaking technology including a high-pressure common-rail, direct ...

In terms of fuel economy, the winner hands-down is the 3.0L turbo-diesel Duramax, with up to 29 mpg highway in the Silverado 1500. According to Fuelly, a 6.6L turbo-diesel Duramax-equipped Sierra ...

Feeding this system is a 5.8-gallon urea tank that is expected to last for an entire oil-change interval, but if the truck is used for extremely heavy towing it may be expended earlier.

Lawsuit Alleges Chevrolet and GMC Duramax Engines Sold With Wrong Parts Can’t ... “Towed to a dealer diagnosed as a high-pressure injector pump failure with metal contamination to fuel system.

A new, 36-gallon (136 L) fuel tank is standard on all models and, with the improved fuel efficiency of the powertrains, enables a cruising range of up about 680 miles (1,090 km) with the Duramax 6.6L.