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

A new heavy-duty diesel engine from GM is set to power next-generation Chevrolet Silverado and GMC Sierra HD pickups, combining raw performance with impressive capability. The Duramax 8.3-liter V-8 produces a substantial 555 horsepower and a staggering 1,230 pound-feet of torque, positioning it as a standout option for demanding towing and hauling tasks. The engine will make its debut in 2027 models, offering truck buyers a glimpse of advanced diesel technology. This development signals a significant upgrade in the lineup for GM’s full-size pickup trucks.

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.