GM didn’t give all of its engineering attention to the new diesel engine. The gas 6.6-liter V-8 has been updated, as well.

General Motors has teased a new Duramax diesel 8.3-liter engine that it has dubbed “Mongoose.” GM’s teaser video took shots ...

GM’s new 8.3L Duramax Mongoose is coming for 2027. Here are five things we know about the massive diesel V8—and five we still don’t.

In this case, more is more. GM built a powerhouse with its new heavy-duty pickup engine that makes 555 hp and best-in-class torque.

A big new diesel engine is just one of several notable improvements coming to 2027 Chevrolet and GMC heavy-duty pickups.

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." ...

GM's new 8.3-liter Duramax Mongoose targets Ford's Power Stroke and Ram's Cummins, but record diesel prices could hurt HD ...

GM calls it the "Mongoose," and it promises to beat Ford's "Scorpion" 6.7-liter Power Stroke that makes 500 hp and 1,200 ...

Earlier this week, GM dropped a new teaser video signaling the imminent arrival of a new 8.3L V8 Duramax diesel. Now, The General has announced output numbers.

GM has confirmed its all-new Mongoose 8.3L Duramax turbodiesel V8, but one very important question remains: how much power ...

GM unleashes the colossal 8.3L Duramax Mongoose V8 to take on Ford and RAM rivals.

GM has confirmed that it will debut a new, Ford Super Duty hunting 8.3L version of the Duramax diesel dubbed the 'Megamax' in its 2027 model year HD pickups.