GM’s leaked powertrain guide for the 2017 model year denotes that the L5P figures are SAE J1349 certified, which means that the numbers were derived using the latest standards and specifications in ...

Known under the VIN code Y, the L5P Duramax is the latest evolution of the 6.6-liter turbo diesel that powers the Silverado HD and Sierra HD. Introduced for the 2017 model year and mated exclusively ...

Update: the numbers for the new Duramax L5P are officially in. First things first: the current 6.6L V-8 Duramax LML under the hoods of GM’s 2016 model year trucks is rated at 397 horsepower and 765 ...

After Ford announced the all-new F-Series Super Duty for the model year 2017, General Motors and Fiat Chrysler got left behind big time. Whereas Ram Truck still has a long way to go until it updates ...

Modern diesel truck engines are, as we know, massively powerful from the factory—each of Detroit’s Big Three has heavy-duty pickups that hover around or above 1,000 pound-feet of torque. General ...

Gale Banks and the rest of the crew at Banks Power have tried one way after another to kill their Duramax L5P diesel test engine, but so far, it just ain’t happenin’. People had their doubts when they ...

The ever-escalating diesel horsepower and torque race appears it’s in full force, if figures found on the GM Powertrain site are any indication. Technically, the site is in the public domain, but is ...

Unbeknownst to many of you, we have been running and testing a defense-market version of the all-new, ’17 6.6L Duramax L5P engine on the dyno since late 2015. Based on what we’ve learned during this ...

When it comes to pickup trucks, most enthusiasts take a hardline stance. You're either a Ford fan, a Ram fan, or a Chevy fan. There doesn't tend to be a lot of compromise or love lost between the ...