GM aims new heavy-duty diesel V-8 called Mongoose at Ford’s Scorpion

A powerful new diesel engine from GM is set to redefine heavy-duty truck performance, with the Duramax 8.3-liter V-8 generating an impressive 555 horsepower and 1,230 pound-feet of torque. This latest iteration of the Duramax lineup will make its debut in the upcoming 2027 Chevrolet Silverado and GMC Sierra HD pickups, promising enhanced capability for demanding workloads. Engineered for durability and efficiency, the new V-8 aims to meet the needs of professionals and enthusiasts alike. Early details suggest it could mark a significant upgrade for GM’s commercial truck lineup.

GM's new heavy-duty diesel engine delivers 555 hp and 1,230 pound-feet of torque. The Duramax 8.3-liter V-8 will debut on 2027 Chevrolet Silverado and GMC Sierra HD pickups this year.