The 3.0L Duramax diesel inline-six from General Motors is currently standard equipment on the 2024 GMC Sierra 1500 AT4X.

The diesel may have fewer horsepower, but its 495 lb-ft of torque is 35 more than what you get with the 6.2-liter V-8 that you can go for.

Several Sierra 1500 models from GMC were updated for 2024 as well, with new paint hues and an active exhaust system.

Chevrolet said this week that the Duramax diesel 3.0 litre inline-six will be standard equipment in the 2024 Silverado ZR2. It should therefore come as no surprise that GMC has made the smaller Duramax the standard engine in the 2024 Sierra AT4X.

Duramax Diesel Engine

While the oil-burning straight-305 six’s horsepower is fewer than the 420 horsepower offered by the enormous 6.2-liter V-8, its extra 35 lb-ft of torque becomes decisive. The diesel engine generates 495 pound-feet of torque, while the V-8 engine generates 460 lb-ft.

The 3.0-liter diesel engine from GM and Duramax has been modified with a retuned turbo compressor, new fuel injectors, new steel pistons, and improved temperature management features, all of which contribute to the increase in torque. Although we haven’t tried the new Duramax model just yet, we really liked the previous model’s improved performance and low noise level.

Other than that, the 2024 GMC half-ton pickup truck is very similar to the Chevy half-ton in terms of upgrades. The Sierra’s top trims now come standard with a power-retractable side step and an active exhaust system. In addition to the new paint jobs and wheels, there are now four available hues (Downpour metallic and Thunderstorm Gray). The Sierra 1500’s “TurboMax” moniker refers to the new name for the basic trim’s 2.7-liter turbo four-cylinder engine.

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Jack Fitzgerald’s devotion to Formula 1 is the root of his passion for vehicles.
In order to get behind the wheel of all the new vehicles he couldn’t afford, he decided to become an auto writer after working as a detailer at a local dealership group while college. He hounded his teachers at UW–Milwaukee into helping him travel across Wisconsin in search of auto industry tales, and eventually landed his dream job at Car and Driver as a result. Now, he’s trying to put off the day when his 2010 VW Golf dies.