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8.3L Duramax vs. Ford Power Stroke vs. Ram Cummins

General Motors has introduced the Mongoose, an 8.3L Turbo-Diesel V8 engine for the 2027 Chevy Silverado HD and GMC Sierra HD. The engine produces 1230 lb-ft of torque, positioning it as the most powerful diesel in the American heavy-duty pickup market. This new powerplant replaces previous diesel offerings in GM's refreshed heavy-duty lineup to compete directly with Ford Power Stroke and Ram Cummins engines.

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  • ✓ The 2027 Chevy Silverado HD and GMC Sierra HD feature an 8.3L diesel engine called Mongoose.
  • ✓ The Mongoose engine is a Turbo-Diesel V8.
  • ✓ The 8.3L Mongoose engine produces 1230 lb-ft of torque.
  • ✓ The 8.3L diesel is part of a refresh for GM heavy-duty trucks.
🛡️ Source Corroboration: 8 independent reporting domains (95% confidence) ⏱ Read time: ~2 min

What changed

General Motors released the 8.3L Mongoose Turbo-Diesel V8 for 2027 heavy-duty models.

Live updates

  1. GM Debuts 8.3L Mongoose Diesel for 2027 Heavy-Duty Trucks

    General Motors has introduced the Mongoose, an 8.3L Turbo-Diesel V8 engine for the 2027 Chevy Silverado HD and GMC Sierra HD. The engine produces 1230 lb-ft of torque, positioning it as the most powerful diesel in the American heavy-duty pickup market. This new powerplant replaces previous diesel offerings in GM's refreshed heavy-duty lineup to compete directly with Ford Power Stroke and Ram Cummins engines.

    Why it matters

    The heavy-duty truck market relies on torque and towing capacity for commercial and consumer utility. This engine launch represents a shift in the power hierarchy among the three major American truck manufacturers.

    What is confirmed

    • The 2027 Chevy Silverado HD and GMC Sierra HD feature an 8.3L diesel engine called Mongoose.
    • The Mongoose engine is a Turbo-Diesel V8.
    • The 8.3L Mongoose engine produces 1230 lb-ft of torque.
    • The 8.3L diesel is part of a refresh for GM heavy-duty trucks.

    Still unconfirmed

    • The 8.3L Duramax is now the most powerful diesel-powered HD pickup in America.
    • Next-generation GM pickup engines will not require a dipstick to check oil.

    What to watch next

    • Official horsepower ratings for the Mongoose engine
    • Comparative towing capacity tests against Ford and Ram
    • Pricing for the 2027 Silverado HD and Sierra HD trims
    Sources used for this update (9)
    1. Edmunds — How Much Is a 2027 Chevy Silverado? We Breakdown Every Trim's Price
    2. Detroit Free Press — Why no dipstick is needed to check oil in GM's next-gen pickup engines
    3. Car and Driver — 2027 GMC Sierra 1500 Starting Prices Spike with New Generation
    4. Pickup Truck +SUV Talk — 8.3L Duramax vs. Ford Power Stroke vs. Ram Cummins
    5. General Motors — GM raises the bar for Heavy-Duty power, capability and control headlined by all-new Duramax 8.3L Turbo-Diesel V8 engine
    6. roadandtrack.com — GM’s Huge 8.3-Liter ‘Mongoose’ Diesel for Chevy and GMC’s HD Trucks Cranks Out 1230 LB-FT of Torque
    7. Car and Driver — The 2027 Chevy Silverado HD and GMC Sierra HD Debut a Gigantic 8.3L Diesel Engine Called Mongoose
    8. qz.com — GM is revealing refreshed heavy-duty Silverado and Sierra trucks with a new 8.3-liter diesel
    9. www.aol.com — Ford Vs. Chevrolet Vs. Ram: The HD Diesel War Has A New Leader
    confidence 95%
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