GM just recently yanked the sheets off the updated 2024 GMC Sierra HD in October. This mid-cycle refresh brought with it an updated exterior, an overhauled cockpit, two new trim levels, and some powertrain updates. Today, we’re taking a closer look at the updated Sierra 3500 HD in the following GM Authority Live Photo Gallery.
This particular truck is a 2024 GMC Sierra HD in the Crew Cab, Long Bed configuration. It’s finished in the luxurious Denali trim level and features the Dual Rear Wheel (dually) setup, which serves as a giveaway that this Sierra HD is a 3500 HD, given that the 2500 HD trucks can only be had with a Single Rear Wheel layout. Rocking Onyx Black (Color Code GBA) exterior paint, this truck is equipped with the updated Duramax turbodiesel engine, as well as the GMC MultiPro Tailgate out back.
It’s worth noting that the Denali trim was the ranging-topping trim for the Sierra HD through the 2023 model year, but that will change for the 2024 model year with the introduction of the Denali Ultimate.
This Sierra HD dually is not dissimilar to another Sierra HD we covered earlier this month. However, that Sierra HD was adorned in the Denali Ultimate trim, and was a 2500 HD model.
As a reminder, the 2024 GMC Sierra HD will soldier on with the naturally aspirated 6.6L V8 L8T gasoline engine, which remains rated at 401 horsepower and 464 pound-feet of torque. The 6.6L V8 L5P turbodiesel Duramax continues to be optional across most trims, while being standard on the Sierra Denali Ultimate. For the mid-cycle refresh, the turbodiesel has been enhanced to produce 470 horsepower and 975 pound-feet of torque, a 25 horsepower and 65 pound-feet or torque improvement.
An Allison-branded ten-speed automatic transmission will serve as the sole transmission option.
When it comes to HD trucks, towing is vital, and the 2024 Sierra HD lineup delivers. Max towing figures are rated at 21,900 pounds for 2500 HD Crew Cab models, and 36,000 pounds for 3500 HD.
Official pricing details are expected closer to the start of production, which set to begin during the first quarter of 2023.