A new heavy-duty diesel engine from GM is set to power next year’s 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 those needing serious towing and hauling power. The engine’s arrival marks a significant upgrade for the lineup, catering to buyers who demand both strength and efficiency in their trucks. Details on its debut in 2027 models are now available, offering a glimpse into GM’s latest engineering advancements.
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.
