
The GMC Sierra HD has established itself as a formidable player in the heavy-duty truck segment since its introduction.
Known for its power, performance, and capability along with its exceptional reliability, the Sierra HD series has continually evolved, offering enhanced features with each iteration. The 2024 GMC Sierra HD, led by the first-ever Sierra Heavy Duty Denali Ultimate, sets a new benchmark in the series. It boasts premium luxury and comfort, turbocharged pulling power, and advanced technology including the most comprehensive suite of trailering assistance features within its class. This latest model year builds upon the Sierra HD’s already strong foundation, introducing the off-road optimized Sierra HD AT4X trim alongside the new Sierra HD Denali Ultimate, further reinforcing GMC’s dominance in the heavy duty truck market.










What’s new on the 2024 GMC Sierra HD?

Technology
The 2024 Sierra HD is a technological marvel, boasting a best-in-class 13.4-inch-diagonal tablet-style infotainment touchscreen, offering a customizable and user-friendly experience. It includes up to 14 camera views for enhanced visibility and safety, and integrated tools like the ProGrade Trailering System elevate trailering assistance to new levels. The truck also features Google built-in and is compatible with both Wireless Apple CarPlay and Android Auto.
These technologies offer tangible benefits to users. The expansive touchscreen and digital displays provide easy access to vital vehicle and navigation information, enhancing the driving experience. The trailering technologies, such as the Transparent Trailer View and Trailer Side Blind Zone Alert, improve safety and confidence when towing. Compared to previous models, these advancements represent a significant leap in making the Sierra HD more connected, safer, and easier to operate, especially under demanding conditions.
Exterior
The 2024 Sierra HD boasts a refreshed exterior that blends sophistication with functionality. Each trim level, including the Pro, SLE, SLT, AT4, Denali, and Denali Ultimate, showcases distinctive grille designs and finishes that enhance the truck’s visual appeal. Moreover, a revised front bumper and fascia contribute to a more commanding presence. The truck’s exterior redesign also incorporates animated lighting that activates upon approach, start, or when turn signals are used, adding a modern touch. Additionally, new wheel designs can be found across various trims, such as larger 18-inch polished aluminum wheels for dual-rear-wheel models and new 22-inch accessory wheels, which further enhance the truck’s robust stance.
It is important to note that the exterior modifications of the 2024 Sierra HD are not purely aesthetic but also designed with practicality in mind. The revised front end design aids in improving aerodynamics and cooling efficiency, which is crucial for maintaining performance when carrying heavy loads. In terms of safety and visibility, the animated lighting feature enhances visibility, especially in low-light conditions. Furthermore, the updated wheel designs, particularly the larger options for dual-rear-wheel models, contribute to improved stability and handling, making towing and hauling tasks more manageable. Lastly, the introduction of six new exterior colors, including premium options like Titanium Rush Metallic and Redwood Metallic, allows for greater personalization and appeal.


Interior
Inside, the 2024 Sierra HD differentiates itself with unique interiors across different trims. The SLE and SLT trims receive new interior designs, while the AT4, Denali, and Denali Ultimate trims boast GMC’s premium interior aesthetics. These changes include new color and stitching designs and an increased use of premium materials throughout the cabin. This approach not only enhances the visual appeal of the interiors but also elevates the overall feel of luxury and sophistication.
The Sierra HD’s interior is more than just visually appealing; it’s designed for comfort and functionality. The Denali Ultimate, for example, features full-grain leather seats and open-pore Paldao wood, along with new 16-way power-adjustable and massaging front seats, delivering unparalleled comfort in a heavy-duty truck. The cabin’s design also emphasizes ergonomics and user-friendliness, with features like the Bose Premium audio system and rear camera mirror enhancing both driver and passenger experience.
Engine and Powertrain
The 2024 Sierra HD showcases an upgraded powertrain, centered around the available 6.6L Duramax Turbo-Diesel V-8 engine, which is matched with a 10-speed Allison transmission. This formidable combination produces an astounding 470 horsepower and 975 lb-ft of torque. The engine has undergone a redesign, incorporating a more efficient turbocharger and a new combustion system, resulting in enhanced performance throughout its operating range. Additionally, the truck is equipped with a robust 6.6L gas engine, now paired with a 10-speed Allison transmission, optimizing its trailering capability by maximizing power delivery. Base towing capacity in the 2024 Sierra HD is rated at 18,500 pounds for the Sierra 2500 HD while the Sierra 3500 HD has a maximum towing capacity of 36,000 pounds with the Duramax Turbo-Diesel powertrain.
These technical advancements translate into tangible performance benefits. The low-end torque has been increased by 25% compared to the current model, ensuring a more immediate and responsive power delivery, ideal for towing and hauling heavy loads. The 10-speed transmission, available in both diesel and gas variants, provides smoother gear shifts, keeping the engine in its optimal power band. This not only improves driving dynamics but also contributes to fuel efficiency, particularly under load. Furthermore, the Sierra HD boasts enhanced engine braking and improved cooling systems, further bolstering its performance and ensuring reliability and longevity even under demanding conditions. Overall, these advancements make the 2024 Sierra HD an impressive powerhouse, delivering exceptional power and capability for any task.

The 2024 Sierra HD introduces the first-ever Denali Ultimate and the AT4X trims. The Denali Ultimate elevates luxury with unique design elements like a Vader chrome grille and 20-inch Ultra-bright machined aluminum wheels. It also features exclusive comfort functions like massaging seats.
What sets these new versions apart is their blend of luxury, technology, and capability. The Denali Ultimate offers unparalleled luxury in its class, with premium interior appointments like full-grain leather and open-pore Paldao wood. The AT4X trim, on the other hand, focuses on off-road prowess without sacrificing comfort, boasting features like Multimatic DSSV dampers and a rear e-locking differential. It also improves its off-roading capability with a 1.5-inch suspension lift and 35-inch Goodyear Territory tires. These trims offer distinct choices for customers, whether they prioritize ultimate luxury or off-road capability in a heavy duty truck.
Frequently Asked Questions about the 2024 GMC Sierra HD
When will the 2024 GMC Sierra HD arrive on the market?
When will the 2024 GMC Sierra HD arrive on the market?
The 2024 GMC Acadia is no longer being manufactured.
Check out our current inventory for available new models, or explore our used listings for potential deals on pre-owned Acadias, including possibly 2024 models.
How much will the 2024 GMC Sierra HD cost?
How much will the 2024 GMC Sierra HD cost?
As the 2024 GMC Sierra HD is no longer a current model, pricing for different trim levels will vary.
The 2024 GMC Sierra HD offers a wide range of options to cater to diverse preferences. Available trims include the Pro, SLE, SLT, AT4, Denali, and the luxurious Denali Ultimate. These trims offer various engine choices, including a V8 gasoline 6.6L and a V8 Duramax Turbo-Diesel 6.6L. With this array of choices, the 2024 GMC Sierra HD caters to a wide spectrum of customers seeking varying levels of performance and features.