GM's new 555 horsepower Duramax is its first heavy duty diesel designed fully in house, ending 25 years of Isuzu partnership.

Things started to turn around for Detroit’s largest automaker in 2023 when the C8 Corvette Z06 debuted GM’s first go-fast V8 ...

GM didn't stop there, though, as it also upgraded the steering, brakes, and even the gas V8 option to make the Chevy Silverado HD and GMC Sierra HD more impressive than ever before.

Hence General Motors' all-new diesel engine, an 8.3-litre Duramax affectionately nicknamed the Mongoose. The numbers, ...

GM unveiled the 555-hp, 8.3-liter Duramax Mongoose diesel V8 for the 2027 Chevrolet Silverado HD and GMC Sierra HD.

The all-new V-8 powers the 2027 Chevy Silverado HD and GMC Sierra HD, with maximum towing capacity climbing to 38,000 pounds.

The 2027 Silverado HD and Sierra HD gain new off-road steering, braking, Terrain Mode, towing, and chassis upgrades.

Nicknamed "Mongoose", the new turbodiesel V8 finds its way under the hood of the 2027 Chevrolet Silverado HD and GMC Sierra HD ...

General Motors confirmed 1,230 pound-feet of twist from the Mongoose, specifically the 8.3-liter Duramax fitted to 2027 model year HD trucks ...

GM's new 8.3-liter Duramax V8 engine is ready to hit the road and show off its power, touting 555 horsepower and an equally impressive amount of torque.

For 2027, the Silverado HD and Sierra HD also have higher tow ratings and finally switch to a more sophisticated steering ...

The HD reveal comes just days after significant, mid-design cycle powertrain, exterior and interior upgrades to GM’s Chevrolet Silverado and GMC Sierra 1500 light duty trucks. Light duties now offer 5 ...