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 ...

In the May 2017 issue ofDiesel Power, in an article titled “Inside the Duramax L5P,” we visited Gale Banks Engineering in Azusa, California, and documented the complete dismantling of a ...

First arriving as a replacement for the 6.6L LML V8, the turbo-diesel 6.6L L5P V8 Duramax engine is an extremely robust and capable powerplant, producing upwards of 445 horsepower at 2,800 rpm and 910 ...

445 horsepower (332 kW) and 910 lb-ft (1,234 Nm). That’s how potent the redesigned Duramax 6.6-liter V8 is for the model year 2017. Internally referred to as L5P, the newest Duramax is available in ...

The GM L5P Duramax is a turbo-diesel engine produced by General Motors for use in full-size heavy-duty (HD) pickup trucks. Displacing 6.6 liters in a V-8 configuration, the L5P is part of a new ...

The L5P Duramax diesel V8 is what powers heavy-duty work trucks like the 2025 Chevy Silverado 2500 HD and is an amazing powerhouse. It didn't exactly start off that way back in 1984 when GM first ...

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 ...

The Duramax engine was introduced in 2001, and it quickly became known for its reliability and performance. The 6.6L Duramax diesel engine has made an appearance in the Chevrolet Silverado and the GMC ...

My first drive in the 2025 GMC Sierra 2500 HD Denali Ultimate: a deep dive into its plush interior, tech features and ...

Aaron, a 27-year automotive technician and lifelong car enthusiast, attended Specs Howard School of Media Arts and learned the fundamentals of digital video and editing, shot composition and writing.