GM 8.3L Mongoose Duramax V8 Turbo Diesel Confirmed, Targets Ford's Scorpion Engine

GM teases 8.3-liter Duramax diesel engine for 2027 HD trucks

The engine, nicknamed the Mongoose, takes aim at Ford's 6.7-liter Power Stroke diesel, which makes 500 hp and 1,200 lb-ft of torque

GM Teases New 8.3-Liter Duramax 'Mongoose' Engine Just As Diesel Crosses $6.50 Per Gallon Nationwide

We don't know much about the new Duramax, but its name gives us a clear indication of its mission statement: beat Ford's new Power Stroke V8, the Scorpion.

GM 8.3L Mongoose Duramax V8 Turbo Diesel Confirmed, Targets Ford's Scorpion Engine

Detroit's heavy-duty truck segment has a new displacement champ. General Motors teased an 8.3-liter mammoth of a turbo diesel V8 by means of a short video that stars a mongoose and a scorpion. To be sold under Duramax branding, the newcomer will be offered in the 2027 Chevrolet Silverado HD and technically similar 2027 GMC Sierra HD. The order guides for the 2500 and 3500 series reveal two (continue reading...)

GM Targets Ford While Teasing Its New Duramax Diesel 8.3-Liter V-8 Engine Called ‘Mongoose’

And the automaker isn’t shying away from calling out the competition on the other side of Detroit.

GM Is Actually Putting an 8.3L Duramax Diesel in Its HD Pickups to Devour Ford

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GM Stock Gains 2.1% as 8.3-Liter Duramax Teaser Leaves Output Blank

Detroit, September 21, 2026, 18:26 (EDT) GM confirmed an 8.3-liter Duramax for refreshed 2027 Silverado HD and Sierra HD pickups.GM stock closed 2.13% higher at $83.95 during Monday's regular session.Horsepower, torque, towing, pricing and the launch date remain undisclosed. General Motors Company (NYSE:GM) confirmed an 8.3-liter Duramax diesel for its refreshed 2027 heavy-duty pickups Monday.…