- The 2024 GMC Sierra 1500 AT4X now comes standard with GM’s 3.0-liter Duramax diesel inline-six.
- Although it has less horsepower, the diesel’s 495 pound-feet of torque is 35 more than the optional 6.2-liter V-8.
- GMC also modified other Sierra 1500 models for 2024 by adding a newly available active exhaust and two fresh paint options.
Last week, Chevy announced that the 2024 Silverado ZR2 will adopt the 3.0-liter Duramax diesel inline-six as its base engine. Now it’s no surprise that GMC is following suit by making the downsized Duramax the new standard engine in the 2024 Sierra AT4X.
The oil-burning inline-six makes less horsepower than the massive 6.2-liter V-8 option (305 vs. 420 hp, respectively), but turns the tables by providing an additional 35 pound-feet of torque. The diesel produces 495 lb-ft compared to the V-8’s 460 lb-ft.
GM and Duramax updated the 3.0-liter diesel by adding a retuned turbocharger, new fuel injectors, new steel pistons and improved temperature control features that together help the engine squeeze out the higher torque figure, than before was 460 lb.-ft. We haven’t tried the upgraded Duramax option yet, but we loved how refined and quiet the previous version was.
As expected, most of the other changes made to the 2024 models of GMC’s half-ton pickup mirror those of its Chevy counterpart. The Sierra now offers power-retractable side steps and an active exhaust system available on higher trims. Two new wheel options are also added, as well as two fresh paint colors (Downpour Metallic and Thunderstorm Grey). The base 2.7-liter turbo four from base Sierra 1500 trims remains mechanically the same, but is now known as “TurboMax.”
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Associate News Editor
Jack Fitzgerald’s love of cars stems from his still unwavering addiction to Formula 1.
After a brief stint as a detailer for a local dealership group in college, he knew he needed a more permanent way to drive all the new cars he couldn’t afford and decided to get into auto writing. Pursuing his college professors at the University of Wisconsin-Milwaukee, he was able to travel to Wisconsin looking for stories in the automotive world before landing his dream job at Car and driver. His new goal is to delay the inevitable demise of his 2010 Volkswagen Golf.
