A new heavy-duty diesel engine from GM is set to power next-generation Chevrolet Silverado and GMC Sierra HD trucks, combining brute force with refined performance. The Duramax 8.3-liter V-8 delivers an impressive 555 horsepower and 1,230 pound-feet of torque, catering to those needing maximum towing and payload capacity. This engine marks a significant upgrade for the lineup, arriving just in time for the 2027 model year. Truck enthusiasts and commercial fleets will be closely watching to see how this powerplant performs in real-world conditions.
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.
