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 ...

The base engine in the 2017 Silverado HD remains the 6.0L Vortec L96 V-8. The gasoline drinker is still E85-compatible, meaning that it’s capable of running on unleaded or up to 85 percent ethanol.

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 ...

Late last week, General Motors announced it had built its two millionth Duramax engine, an L5P unit bound for either a 2017 Chevrolet Silverado HD or GMC Sierra HD. The L5P, which was recently ...

General Motors and heavy-duty trucks go a long way back. For the time being, the Chevrolet Silverado HD and its GMC-branded twin do the heavy lifting for the Detroit-based automaker. The Silverado HD ...

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 ...