The 2023 Chevrolet Silverado features an updated Duramax diesel engine

Chevrolet’s future is electric, but the blue-collar brand isn’t giving up combustion power just yet. As part of the introduction of the 2023 Silverado ZR2 Bison, Chevy buried an update on the Silverado’s excellent diesel engine.

Starting with the 2023 model year, the 3.0-liter turbodiesel inline-six produces 305 horsepower and 495 lb-ft of torque, compared to 277 hp and 460 lb-ft in the current truck. Chevy has made the improvements with all the delicate, oil-coated parts that make ICE engines work. There’s a retuned turbocharger, upgraded fuel injectors and new steel pistons with an updated combustion bowl. Chevy has yet to announce any fuel economy changes — the current truck returns 22 miles per gallon city, 26 highway and 24 combined with four-wheel drive.

As with current diesel-powered trucks, a 10-speed automatic is the only transmission choice. The revised diesel is available on Custom Trail Boss, LT, RST, LT Trail Boss, LTZ, or High Country trims, but not Silverado ZR2 or ZR2 Bison. It’s both disappointing (because the Colorado ZR2 carried an optional Duramax) and bizarre (because Chevy paired that ad while introducing the more powerful Silverado ZR2 variant).

While the Motor1.com The team hasn’t sampled Chevy’s Duramax straight-six in a few years, which was a highlight in our reviews of the Silverado and Tahoe, as well as the GMC Sierra. Loud and punchy from a standstill, engine rpm climbs smoothly and predictably, with little performance lag. The throttle is excellent, with a nice weight that makes modulation a breeze. And the 10-speed is, as with the 6.2-litre, a fantastic partner for the engine. The turbodiesel is also quiet at cruising speeds.

While Chevy is focused solely on the Silverado, the updated version of this popular engine will likely make its way to the Tahoe/Suburban, as well as the GMC Sierra and Yukon and potentially the Cadillac Escalade. Bowtie loyalists will be able to buy a Silverado with the updated engine later this year, when it begins rolling out of GM’s engine plant in Flint, Michigan.

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