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

GM says the new diesel is aimed at Ford’s Power Stroke and could top 500 horsepower and 1,200 lb-ft of torque.

Summary by Autoevolution
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...)

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GM Authority broke the news on Monday, September 21, 2026.
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