Cars

2024 GMC Sierra HD Is a Diesel Towing Champ

Adjustments to the 6.6-liter Duramax diesel V8 give the new Sierra HD some impressive towing chops.

Andrew Krok

Cars are Andrew's jam, as is strawberry. After spending years as a regular ol' car fanatic, he started working his way through the echelons of the automotive industry, starting out as social-media director of a small European-focused garage outside of Chicago. From there, he moved to the editorial side, penning several written features in Total 911 Magazine before becoming a full-time auto writer, first for a local Chicago outlet and then for CNET Cars.

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Andrew Krok

Oct. 6, 2022 6:00 a.m. PT

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GMC on Thursday unveiled the 2024 GMC Sierra HD.

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Not only does it pick up a new top-level trim, but this heavy-duty truck also carries a number of updates to its aesthetics, powertrain and cabin tech.

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Changes to the front bumper, fascia and grille give the truck an angrier look without going too hard in the paint, and I think the new grilles play better with the headlights.

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New wheel designs are also on offer, in addition to six new paint colors.

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GMC also updated the 6.6-liter Duramax diesel V8.

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It now makes 470 horsepower and 975 pound-feet of torque, improvements of 25 and 65, respectively.

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With a new Max Tow Package, the 2024 Sierra 2500HD can tow up to 22,500 pounds, while the 3500HD brings that to an impressive 36,000 pounds.

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A 6.6-liter gas V8 is available, as well, and it now comes mated to an Allison 10-speed automatic transmission, replacing the last generation's 6-speed automatic.

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The 2024 GMC Sierra HD arrives at dealerships in the first quarter of 2023, although the off-road-friendly AT4X trim won't be available until later that year.