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GM Unleashes Mongoose Duramax 8.3L Turbo Diesel V8, Promises Best-In-Segment Muscle
The clean-sheet diesel delivers 555 horsepower and 1,230 lb-ft of torque as GM targets heavier towing and hauling in HD pickups.
- General Motors unveiled a new 8.3-liter Duramax diesel engine for 2027 Chevrolet Silverado HD and GMC Sierra HD trucks, internally code-named "Mongoose" and producing 555 horsepower and 1,230 lb-ft of torque.
- This clean-sheet design features a compacted graphite iron block, forged steel crank, and steel pistons, marking GM's first in-house heavy-duty diesel developed to improve durability and structural rigidity.
- When properly equipped, the trucks achieve 38,000 pounds maximum towing capacity with a gooseneck configuration; Ford retains the segment's outright maximum at 40,000 pounds.
- Engineers introduced a segment-first electric rack-and-pinion power steering system and electronic brake booster, replacing hydraulic systems to reduce kickback and improve handling during heavy towing.
- The 2027 models arrive at dealerships nationwide later this year, with production of certain Heavy Duty units occurring at General Motors' Oshawa plant; pricing will follow closer to launch.
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GM Unleashes Mongoose Duramax 8.3L Turbo Diesel V8, Promises Best-In-Segment Muscle
Detroit's heavy-duty truck race just got a new peak torque champ, and its name is Mongoose. A leviathan of a diesel engine, said 8.3-liter mill is a turbocharged V8 destined for the 2027 Chevrolet Silverado HD and its GMC-branded twin. When equipped with the Mongoose, both develop best-in-segment power (555 hp) and torque (1,230 lb-ft). For those who prefer metric units, the numbers are 563 ps and 1,667 Nm. Context matters ... (continue readin…
·Bucharest, Romania
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GM's New 8.3L Diesel Borrows Something Crucial From the Canceled 'Baby Duramax'
GM almost revolutionized pickups in the late 2000s with a high-tech Duramax diesel. It was eventually canceled due to the recession, but part of it still lives on in the new 8.3-liter "Mongoose."
·Miami, United States
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