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 world of diesel performance has undergone a tremendous amount of change in recent years. For all intents and purposes, on newer pickup trucks, SUVs, and vans, gone are the days of individuals—and ...

A delete kit is an OEM amendment package that removes or turns off emissions-associated components in a diesel engine. The ...

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 ...

Introduced for the 2017 model year, the L5P is the Duramax V8 turbo diesel General Motors utilizes in heavy-duty pickups like the Silverado HD. Manufactured in the United States, the 6.6-liter turbo ...

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 ...