Introducing The New 2025 GMC 2500 HD Denali Ultimate Review

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2025 GMC 2500: The automotive industry is abuzz with anticipation for the upcoming release of the 2025 GMC Sierra 2500. As one of the most popular heavy-duty pickup trucks on the market, the Sierra 2500 has built a reputation for its exceptional performance, durability, and versatility

During General Motors Investor Day, GM President Mark Reuss made it clear that the company’s focus on electric vehicles, autonomous technology, and advanced software does not mean they are abandoning traditional pickup trucks.

Reuss stated that the next-generation Chevrolet Silverado and GMC Sierra are scheduled to be launched in 2025, and he confirmed that there will be significant improvements in powertrains, efficiency, and performance. Additionally, he mentioned that the upcoming family of GM trucks will undergo an “engine portfolio update” to reduce greenhouse gas emissions by over 10 percent compared to the current offerings.

The GMC Sierra HD pickup truck has earned the trust of drivers who require the power and capability of a heavy-duty truck. GMC is raising the bar for heavy-duty trucks with the introduction of the new Sierra Heavy Duty and the first-ever Sierra HD Denali Ultimate. These trucks offer enhanced power, a wide range of advanced trailering technologies, and a refined interior that prioritizes comfort and convenience for occupants.

2025 GMC 2500 Review

The upcoming 2025 GMC Sierra is anticipated to introduce the next generation of full-size pickup trucks. A recent GM Investor Event saw General Motors President Mark Reuss addressing the company’s commitment to enhancing efficiency and reducing greenhouse gas (GHG) emissions with the forthcoming next-gen trucks.

In Fact: 2025 GMC 2500 HD

Reuss emphasized that the new Sierra will feature updated powertrains, boasting significant improvements in efficiency and performance. He further stated that the next generation of full-size trucks will undergo an engine portfolio update, resulting in a greenhouse gas reduction of more than 10 percent compared to the current offerings.

In addition to the improved powertrains, the 2025 GMC Sierra will showcase completely new exterior and interior designs, as well as utilize a brand-new platform.

While it is likely that an electric version of the GMC Sierra will be part of the future lineup, it is important to note that the next-gen Sierra will not utilize the same platform as the GMC Hummer EV SUV and Hummer EV Pickup, which are based on the Ultium Platform, incorporating GM’s Ultium battery technology and Ultium drive technology.

2025 GMC 2500 Specs

When it comes to GMC Sierra heavy-duty trucks, their notable reputation lies in their impressive engine power and towing capacity.

GMC is taking the existing 6.6L V8 Duramax Turbo-Diesel, which is already capable, and enhancing it by combining it with a 10-speed Allison transmission. This powerful combination results in 470 horsepower (at 2800 rpm) and 975 lb.-ft of torque (at 1600 rpm), providing increased power throughout the entire range of operating speeds.

Notably, there is a significant improvement in low-end torque production, which sees a boost of up to 25 percent compared to the current model. This enhancement translates to improved towing performance for the GMC Sierra.

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Redesign and Refresh

The 2025 Sierra 2500 is anticipated to feature a notable redesign and refresh to keep up with evolving industry trends and customer preferences. While specific design details remain under wraps, we can anticipate an updated front grille, redesigned headlights, sleeker body contours, and other enhancements that blend functionality with modern aesthetics. GMC’s dedication to craftsmanship and attention to detail ensures that the 2025 Sierra 2500 will exude a strong and distinctive presence on the road.

2025 GMC 2500 Interior

The GMC Sierra Heavy Duty sets the bar for trailering assistance technology in its class. Its ProGrade™ Trailering System consists of a range of intelligent trailering assistant technologies designed to simplify the process of hitching and towing. These integrated tools provide drivers with a heightened sense of confidence when towing.

2025 GMC 2500

With up to 14 available camera views, including an advanced transparent trailer view, the Sierra Heavy Duty offers a unique feature that allows drivers to virtually “see through” their trailer. By utilizing cameras mounted on the rear of the truck and trailer, the system stitches together a composite view of the area behind the truck as if the trailer were transparent.

This enhanced feature, available in the 2024 model, proves especially useful when towing large campers or trailers. It expands upon the existing transparent trailer technology and enables compatibility with fifth-wheel and gooseneck trailers.

Furthermore, the Sierra Heavy Duty enhances its available Cruise Control feature with Adaptive Cruise Control. This system utilizes the front camera to adjust the cruise control speed based on the preceding vehicle, employing the throttle and brakes to maintain a driver-selected following gap. When towing a trailer, the Adaptive Cruise Control system takes into account the added drag and increased braking distance required, thereby helping to reduce driver fatigue during long journeys.

2025 GMC 2500 Exterior

The exterior of the 2025 Sierra 2500 is poised to impress with its rugged yet refined appearance. GMC’s commitment to craftsmanship and durability will be evident in the truck’s robust build quality. The redesigned front grille, sleek headlights, and muscular body lines will give the Sierra 2500 an imposing and commanding presence on the road.

Additionally, expect the inclusion of practical features such as bed storage options, innovative tailgate designs, and advanced lighting systems to enhance functionality and convenience.


The Sierra HD lineup consists of the 2500 and 3500 HD models, available in Regular, Double, and Crew Cab configurations. The 3500 HD models also offer dual-rear-wheel options. There is a range of available trims to choose from, including Pro, SLE, SLT, AT4, Denali, and Denali Ultimate. Additionally, the AT4X trim will be introduced later in the model year.

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Sierra HD Denali Ultimate

The Sierra Heavy Duty lineup introduces the first-ever Sierra HD Denali Ultimate, a luxurious heavy-duty pickup truck that combines power with premium comfort and style.

2025 GMC 2500

The Sierra HD Denali Ultimate commands attention on the streets with its iconic Denali design and new signature exterior details. The truck features a redesigned Denali signature grille with Vader chrome finish, Vader chrome GMC badging, unique Denali Ultimate fender badging, new LED projector headlamps with animated lighting sequences, power-retractable assist steps with LED perimeter lighting, and high-end 20″ ultra-bright machined aluminum wheels with high gloss black accents. Additionally, it comes equipped with the world’s first six-function MultiPro™ tailgate, which includes a KICKER® audio system.

Inside the Sierra HD Denali Ultimate, the interior takes luxury to new heights and provides ultimate comfort in a heavy-duty truck. It showcases the exclusive Alpine Umber interior, featuring premium finishes such as soft and durable full-grain leather with plaited stitching, enveloping the best-in-class 16-way power front massaging seats, door panels, and center console lid. The interior is further enhanced by authentic, open-pore Paldao wood with unique graining, adding a distinctive color blend and meticulous attention to detail.

Craftsmanship is paramount in the Alpine Umber interior, evident in the small details such as Denali Ultimate badging on the front seatbacks and stainless-steel speaker grilles. Additionally, the interior pays tribute to the inspiration behind the truck’s name, with a topographical map of Mt. Denali laser-etched and embossed throughout the interior, adding a touch of sophistication and connection to its namesake.

Engine and Performance

The GMC Sierra HD also provides exceptional towing capabilities, with a best-in-class towing capacity of up to 22,070 lbs for the 2500 crew cab model and a maximum towing capacity of up to 36,000 lbs for the properly equipped 3500 HD regular crew cab, featuring the Duramax 6.6L Turbo-Diesel V8.

To improve performance and combustion efficiency, several changes and upgrades have been implemented. The latest version of the Duramax engines includes various refinements such as a more efficient turbocharger for enhanced low-end torque, increased power and torque across the entire range of operating speeds, improved engine braking through a more powerful turbo vane actuator and uprated valve springs, improved cooling jackets in the new cylinder heads, and an all-new combustion system matched with next-generation, higher-flow injectors, and increased fuel injection pressure. Additionally, there is a new engine controller and robust enhancements to the cylinder head and glow plugs.

2025 GMC 2500

Not only have enhancements been made to the available 6.6L V8 Duramax Turbo-Diesel, but GMC has also paired the 10-speed Allison Automatic transmission with the standard 6.6L V8 gas engine, replacing the previous six-speed automatic.

The new transmission offers smaller “steps” between gears, allowing the 6.6L V8 gas engine to operate closer to its peak power of 401 horsepower and 464 lb.-ft. of torque for longer periods. This combination results in a more confident and responsive power delivery, whether the truck is towing a trailer or not. The 10-speed configuration, along with the ability to fully utilize the torque in each gear, contributes to this improved performance.

2025 GMC 2500 Price and Release Date

The 2025 GMC 2500 starts at around $40,000 for the base model and can go up to over $80,000 for the top-of-the-line Denali trim level. The truck is expected to be released in the fall of 2024, and it will be available at GMC dealerships nationwide.


The 2025 GMC Sierra 2500 promises to be a game-changer in the heavy-duty truck market. With its impressive specifications, anticipated redesign and refresh, luxurious interior, rugged exterior features, and powerful engine options, this truck is poised to exceed the expectations of enthusiasts and professionals alike. While awaiting its official release, potential buyers can anticipate a wide range of color choices to personalize their Sierra 2500 according to their preferences.

Pricing details will be unveiled closer to the release date, providing customers with valuable information to make an informed purchasing decision. The 2025 GMC Sierra 2500 is undoubtedly set to deliver an exceptional blend of performance, capability, style, and innovation, solidifying its position as a top contender in the heavy-duty truck segment.