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A bold, beautiful, and rugged three-quarter-ton pickup, the 2024 GMC Sierra 2500 HD represents the perfect middle-ground between a utility-rich heavy-duty pickup and a lavish luxury vehicle. This 2024 model has proven to be a large step up for the Sierra 2500 HD in offering a lot of content for potential heavy-duty truckers, including quality-of-life updates and new trim options.
The most significant update is the inclusion of the Denali Ultimate trim, which was originally introduced for the light-duty Sierra 1500. This trim is now available for its larger sibling, featuring a Vader Chrome GMC badge on a distinguished front grille and 20-inch ultra-bright machined aluminum wheels with glossy black accents. A unique fender sporting a topographical overlay of Mount Denali also comes with the Denali Ultimate, as do power assist steps, the MultiPro Tailgate, a Kicker sound system in the bed, and 16-way power front leather seats with massage capabilities. There is also open-pore Paldao wood trimming throughout the interior with Alpine Umber contrasts.
This 2024 model also delivers the all-new AT4X off-road trim with an AEV Edition. For those who want to take advantage of this heavy-duty pickup's off-road capabilities, the AT4X offers Multimatic DSSV electronically controlled dampers, an AEV hot-stamped boron steel front bumper, 18-inch AEV Salta wheels in a gloss black finish wrapped in 33-inch Goodyear Wrangler Territory Mud-Terrain tires.
But the new features don't end there for the 2024 Sierra 2500 HD; there is also an update to the Duramax diesel engine's power output as well as all-new wheel designs across the trims (including 22-inch accessory wheels), an all-new front fascia refresh, six new exterior colors—Titanium Rush Metallic, Sterling Metallic, Volcanic Red Tintcoat, Redwood Metallic, Meteorite Metallic, and Downpour Metallic—and a lineup of seven trims: the Pro, SLE, SLT, AT4, Denali, AT4X, and the Denali Ultimate.
The Sierra 2500 HD's performance scaling is measured across two distinct powertrains, both having received interesting changes for this model year. These include a buff to the 6.6L Duramax Turbo-Diesel V8, which now outputs up to 470 hp at 975 lb-ft of torque—a significant boost over the outgoing model year. The 2024 Duramax's horsepower is buffed by nearly 5%, while the torque has seen a nearly 7% increase; this means more towing capacity, better trailering capacity, more responsive off-the-line performance, and overall better power scaling. The Duramax is paired up with the ten-speed automatic Allison transmission with available power take-off functionality.
Alternatively, you can opt for the 6.6L gas-powered V8, which delivers 401 hp at 464 lb-ft of torque. New for 2024, the 6.6L gas-powered V8 comes standard with the ten-speed automatic Allison transmission, so you get improved shifting and a more dependable transmission for all your heavy-duty needs. The gas-powered V8 and the Duramax turbo-diesel are both available in rear-wheel or four-wheel drive; for off-road iterations, you'll have the Autotrac two-speed transfer case with push-button controls.
The automatic locking rear differential is standard on all trims, while select trims have access to the digital variable steering assist so that your handling is automatically adjusted based on road conditions. A heavy-duty cold-cranking 720-amp battery and air filter are also standard across the trim line. An integrated trailer brake controller and off-road suspension are available for towing and trailering for the off-road models.
The biggest selling point for any three-quarter-ton pickup is its ability to tow, trailer, and haul cargo. This truck's capabilities to travel off-road or be used as a heavy-duty transport or mobile work-station are all important, and that's something that GMC has made sure that the 2024 Sierra 2500 HD accomplishes with flying colors.
You can get the Sierra 2500 HD in a standard or long-bed format with three cab configurations: a regular cab, a double cab with two and two-half doors, and a crew cab with four doors. Every cab seats up to six people, with the exception of the regular cab, which seats up to three. The rear standard bed is 81 inches long, while the long bed is 98 inches. When properly configured, this pickup can carry up to 3,850 lbs of payload, which gives you a lot of breadth regarding what—and how much—you can haul.
The towing and trailering are also quite impressive, whether you're doing conventional trailering or using a fifth wheel or gooseneck hitch. The max conventional tow rating for a properly equipped 2024 Sierra 2500 HD is 20,000 lbs, which is an impressive figure; if you need even more tow capacity out of the three-quarter-ton pickup, you can opt for the fifth wheel or gooseneck hitch, which enables you to trailer up to 22,500 lbs.
Other features that give the Sierra 2500 HD a lot of utility and functionality include features like front recovery tow hooks, Hill Descent Control, and the availability of an off-road suspension with a two-inch lift kit for the AT4X trim. There is also the availability of a seven-way wiring harness for a trailer and a variety of available assist steps that range from four to six inches; a rear bed step also comes standard across the trim line, making it easy to reach into the rear cargo bed.
Multiple cargo tie-downs are also available, along with the highly popular GMC MultiPro Tailgate, which boasts six different unique functionalities, from working as a load-stop in multiple positions to being used as a step-in for the cargo bed to being used as an elevated work bench. The MultiPro Tailgate adds a lot of functionality and utility to the 2024 GMC Sierra 2500 HD's capabilities.
Having a beefy three-quarter-ton work truck is great if you need to tow heavy loads, move lots of cargo around, or need reliable transport for work or family, but a truck that's only good at getting a lot of work done without providing a lot of interior comforts is a truck that will quickly fall out of favor with drivers and passengers alike. This is why GMC has added a lot of convenience and comfort features to the 2024 Sierra 2500 HD, so it's great for work and daily driving, long hauls, and recreation.
There are a lot of built-in quality-of-life features—like the power-retractable assist steps and the RainSense automatic window wipers—that help make things easier to handle for owners. Other features like the available power sunroof add a measure of luxury, as do the available 16-way power driver and front passenger leather seats with heated and ventilated capabilities for trims like the Denali Ultimate and AT4X. There are also available features like dual-zone automatic climate control, a lockable console-mounted safe, and multiple storage compartments throughout the cabin—both in the front and rear—including a split bench with under-seat storage capacity.
The infotainment center is likewise themed around being both utilitarian and fun, as you have features like wireless Apple CarPlay and Android Auto that can be paired with the available 13.4-inch touchscreen and 12.3-inch color driver information center. You can utilize these view screens—along with the driver's 15.0-inch heads-up display—for vehicle telemetry, trailering apps, and camera functionality; these give you relevant data on your trailering and truck status as you travel.
With features like OnStar and GM Connected Services, you have access to a lot of additional quality-of-life features, like emergency services or navigation support. Moreover, there are built-in GMC safety features, from front pedestrian detection and braking to automatic emergency braking, along with adaptive cruise control and trailering support. Select trims have access to Super Cruise for hands-free driving across thousands of miles of roads throughout North America. Combine that with the upfitter switches, Wi-Fi hotspot capability, and a multitude of driver and trailer assists, and it's easy to see how effective the 2024 GMC Sierra 2500 HD is at being a functional and convenient three-quarter-ton pickup.