

Prepare to be awed by the 2025 GMC Sierra 2500HD AT4X, a pickup truck that shatters all expectations. Engineered to conquer the most treacherous terrains, this behemoth combines rugged capabilities with refined luxury, offering an unparalleled driving experience.
The Sierra 2500HD AT4X boasts an imposing presence, with its massive grille, muscular fenders, and towering stance. Its all-new, stiffer chassis provides an unshakeable foundation for tackling off-road challenges. The MultiPro tailgate with six unique functions expands the truck’s versatility, making it the perfect companion for both work and play. The interior is a sanctuary of comfort and technology, featuring premium materials, heated and ventilated seats, and a cutting-edge infotainment system.
Under the hood, the Sierra 2500HD AT4X unleashes the power of a Duramax 6.6L Turbo-Diesel V8 engine, paired with an Allison 10-speed automatic transmission. This powertrain delivers exceptional towing and hauling capabilities, enabling you to conquer any challenge with confidence. The truck’s advanced suspension system, featuring Multimatic DSSV dampers, ensures a smooth and controlled ride, even on the most unforgiving terrain.
Dominating the Off-Road Terrain with the GMC Sierra 2500HD AT4X
Conquering Rugged Paths with Unbeatable Off-Roading Prowess
The GMC Sierra 2500HD AT4X is a formidable off-road beast that effortlessly conquers the most challenging terrain. Its advanced suspension system, featuring Multimatic DSSV dampers and forged upper control arms, provides unparalleled stability and control, allowing you to tackle rough trails with confidence. The AT4X also boasts a reinforced chassis with skid plates to protect vital components from obstacles, ensuring durability in even the harshest environments.
Moreover, the Sierra 2500HD AT4X comes equipped with a suite of off-road technologies to enhance its capabilities further. Its advanced 4WD system seamlessly adapts to varying terrain conditions, providing optimal traction and torque where it’s needed most. The available Terrain Mode selector allows drivers to fine-tune the vehicle’s settings for specific off-road scenarios, such as rock crawling, desert running, or mudding, maximizing performance and optimizing overall driving experience.
Key Features:
Feature |
Description |
Multimatic DSSV Dampers |
Provide exceptional suspension control and stability. |
Forged Upper Control Arms |
Enhance strength and durability for improved handling. |
Advanced 4WD System |
Adapts to terrain conditions, maximizing traction and torque. |
Terrain Mode Selector |
Allows customization of vehicle settings for specific off-road scenarios. |
Unveiling the Savage All-Terrain Force: GMC Sierra 2500HD AT4X
The Pinnacle of Off-Roading Prowess
The GMC Sierra 2500HD AT4X is a meticulously engineered masterpiece designed to conquer the most unforgiving terrains. It boasts an array of segment-exclusive features that redefine the boundaries of off-road performance. The Multimatic DSSV spool-valve dampers, for instance, provide unparalleled damping control, ensuring a smooth and stable ride even over the roughest surfaces. Additionally, the front and rear electronic locking differentials work in tandem with the two-speed transfer case to deliver exceptional traction in slippery or uneven conditions.
Multifaceted Terrain Domination
The GMC Sierra 2500HD AT4X offers a comprehensive suite of terrain management modes to optimize its capabilities for any environment. The Terrain Mode selector features six distinct settings: Normal, Tow/Haul, Sport, Off-Road, Terrain, and Snow/Ice. Each mode intelligently adjusts suspension, drivetrain, and throttle mapping to maximize performance in specific driving conditions. Additionally, the Baja Mode, exclusive to the AT4X, unlocks the vehicle’s full potential for high-speed desert adventures.
Terrain |
Description |
Normal |
Balanced performance for everyday driving |
Tow/Haul |
Optimized for towing and hauling heavy loads |
Sport |
Aggressive shift patterns and throttle response for spirited performance |
Off-Road |
Adapts to rough terrain, providing enhanced traction and control |
Terrain |
Automatic mode that fine-tunes settings based on road conditions |
Snow/Ice |
Optimized for maximum stability and traction in snowy or icy conditions |
Rugged Design for Unparalleled Durability
The GMC Sierra 2500HD AT4X’s exterior exudes both ruggedness and refinement. Its one-of-a-kind grille, flanked by bold LED headlights, provides a commanding presence on any trail. The steel front bumper, integrated winch, and skid plates further enhance its off-road capabilities. Inside, the cabin offers a premium and functional environment with leather-trimmed seats, heated front and rear seats, and an intuitive infotainment system featuring off-road-specific navigation.
Engine Performance and Towing Capabilities
Under the hood of the Sierra 2500HD AT4X lies a potent 6.6-liter Duramax Turbo-Diesel V8 engine. This powerplant churns out an impressive 445 horsepower and a colossal 910 lb-ft of torque. With this muscle under the hood, the AT4X can effortlessly tow up to 18,500 pounds, making it a force to be reckoned with on the job site.
Complementing the engine’s prodigious power is GM’s legendary Allison 10-speed automatic transmission. This gearbox provides seamless gear changes, maximizing efficiency and performance. The Advanced Tow-Haul Mode, specifically tailored for towing, optimizes the transmission’s shift points, ensuring maximum power and control when hauling heavy loads.
Further enhancing the Sierra 2500HD AT4X’s towing capabilities is its heavy-duty rear axle with available 4.10:1 gearing. This robust axle provides increased leverage and stability when towing heavy trailers, reducing stress on the driveline components and ensuring a more confident towing experience.
Engine |
6.6-liter Duramax Turbo-Diesel V8 |
Horsepower |
445 hp |
Torque |
910 lb-ft |
Towing Capacity |
18,500 lbs |
Introducing the Beast of the Backcountry: GMC Sierra 2500HD AT4X
Unleash the Adventure with the GMC Sierra 2500HD AT4X
Prepare to conquer the most rugged terrain with the formidable GMC Sierra 2500HD AT4X. This off-road behemoth is a testament to GMC’s commitment to pushing the boundaries of automotive capability. With its superior strength and advanced technologies, the AT4X is ready to tackle any adventure with unmatched confidence.
Dominate the Trails with Enhanced Suspension
The AT4X boasts a best-in-class suspension system engineered to handle the most demanding off-road challenges. Its Multimatic DSSV dampers offer exceptional damping capabilities, delivering optimal stability and control over various terrains. Additionally, the electronic locking front differential and rear locking differential enhance traction and provide superior grip when tackling steep slopes or loose surfaces.
Unleash the Power of the Duramax Diesel Engine
Under the hood lies the mighty Duramax 6.6L Turbo-Diesel V8 engine, renowned for its unmatched power and torque. With 470 horsepower and a staggering 975 lb-ft of torque, the AT4X delivers class-leading performance, allowing you to tow heavy loads and navigate treacherous trails with ease.
Ultimate Off-Road Prowess
The AT4X is meticulously equipped with an array of advanced off-road features that enhance its capabilities and inspire confidence in any terrain. It offers crawl mode, hill descent control, and off-road cruise control to optimize handling and traction over challenging terrain. Additionally, the underbody skid plates provide protection against rocks and other obstacles, while the 35-inch Goodyear Wrangler DuraTrac tires provide exceptional grip and durability.
Feature |
Benefits |
Multimatic DSSV Dampers |
Optimal stability and control over rough terrains |
Duramax 6.6L Turbo-Diesel V8 Engine |
470 horsepower and 975 lb-ft of torque |
Electronic Locking Front and Rear Differentials |
Enhanced traction and grip in challenging conditions |
Crawl Mode, Hill Descent Control, and Off-Road Cruise Control |
Optimized handling and traction on various terrains |
Underbody Skid Plates |
Protection from rocks and obstacles |
Sierra 2500HD AT4X: Trailblazing through Uncharted Territories
Unrivaled Off-Road Prowess
The Sierra 2500HD AT4X is equipped with an array of advanced off-road features that enable it to conquer the most challenging terrains. Its MultiMatic DSSV dampers provide exceptional suspension and handling capabilities, while the electronically controlled front and rear locking differentials allow for maximum traction in slippery conditions. Additionally, the truck’s unique disconnected front sway bar system optimizes articulation and allows for a greater range of wheel travel. These features combine to deliver an unparalleled off-roading experience.
Superior Ground Clearance
The Sierra 2500HD AT4X boasts an impressive ground clearance of 12.5 inches, giving it the ability to navigate over obstacles and uneven surfaces with ease. This clearance is achieved through a combination of high-clearance suspension components, lifted frame, and large tires. The truck’s short overhangs also minimize the risk of snagging on rocks or other obstacles when traversing rough terrain.
Rugged All-Terrain Tires
The Sierra 2500HD AT4X is fitted with massive 35-inch Goodyear Wrangler All-Terrain Adventure tires. These tires feature an aggressive tread pattern and rugged construction, providing excellent grip and traction on various surfaces, including mud, sand, and rocks. The tires also have a self-cleaning design that helps to shed mud and debris, maintaining optimal performance in off-road situations.
Advanced 4WD System
The Sierra 2500HD AT4X is equipped with a robust four-wheel-drive system that provides exceptional off-road capabilities. The system features a two-speed transfer case with automatic and manual modes, allowing the driver to select the appropriate drive mode for different off-road conditions. The system also includes a terrain management system with six different modes, each designed to optimize performance on specific surfaces, such as mud, sand, or rock.
Essential Off-Road Technology
The Sierra 2500HD AT4X comes with a host of advanced off-road technology that enhances its performance in challenging conditions. This technology includes hill descent control, which helps maintain a safe speed on steep descents, and off-road cruise control, which automatically adjusts the throttle and braking to optimize traction and control on uneven terrain. The truck also features a comprehensive off-road information display that provides real-time data on vehicle performance, including pitch, roll, and articulation angles.
GMC’s Off-Road Juggernaut: The Sierra 2500HD AT4X
6. Multidimensional Performance: The MultiPro Tailgate and CarbonPro Bed
The Sierra 2500HD AT4X’s MultiPro Tailgate is a technological marvel that redefines tailgate functionality. With six positions, it offers unparalleled versatility for loading, unloading, and accessing the bed. Whether you’re hauling gear, loading motorcycles, or simply creating a work surface, the MultiPro Tailgate is the ultimate utilitarian tool.
Complementing the MultiPro Tailgate is the CarbonPro bed, an industry-exclusive feature that delivers exceptional strength and durability. Made from a lightweight carbon fiber composite, the CarbonPro bed is corrosion-resistant, dent-resistant, and up to 600 pounds lighter than a traditional steel bed. This weight reduction contributes to increased payload capacity, better fuel efficiency, and improved towing performance.
MultiPro Tailgate Positions |
1. Load Stop |
2. Full-Width Step |
3. Inner Gate Load Stop |
4. Work Surface |
5. Easy Access |
6. Tailgate Down |
Together, the MultiPro Tailgate and CarbonPro bed elevate the Sierra 2500HD AT4X’s functionality to the next level, empowering adventurers with unparalleled versatility, strength, and durability in any off-road endeavor.
Conquering Every Obstacle: The GMC Sierra 2500HD AT4X’s Unmatched Performance
The GMC Sierra 2500HD AT4X is a force to be reckoned with, boasting an array of advanced features that enhance its performance on and off the road.
4-Wheel Drive System with Electronic Locking Differentials
The AT4X’s 4-wheel drive system provides optimal traction in all conditions, while the electronic locking differentials further enhance its grip by distributing power to the wheels with the most traction.
MultiMatic DSSV Shocks
MultiMatic DSSV (Dynamic Suspensions Spool Valve) shocks deliver exceptional ride quality and handling, absorbing bumps and vibrations with precision while maintaining stability at high speeds.
Underbody Skid Plates
Rugged underbody skid plates protect the AT4X’s vital components from damage caused by rocks, logs, and other obstacles commonly encountered off-road.
18-Inch Goodyear Wrangler Duratrac Tires
Goodyear Wrangler Duratrac tires provide superior grip on all types of terrain, from asphalt to mud and snow.
6.6L Duramax Turbo-Diesel Engine
The AT4X’s powerful 6.6L Duramax turbo-diesel engine produces an impressive 445 horsepower and 910 lb-ft of torque, enabling it to tow and haul with confidence.
Grade Braking and Descent Control
Grade braking and descent control help maintain a safe and controlled descent on steep inclines, preventing the truck from accelerating uncontrollably. These features enhance the AT4X’s overall safety and maneuverability.
360-Degree Camera System
The AT4X’s 360-degree camera system provides a comprehensive view of the truck’s surroundings, assisting the driver with visibility in challenging off-road situations.
Feature |
Description |
4-Wheel Drive System |
Optimum traction in all conditions |
MultiMatic DSSV Shocks |
Exceptional ride quality and handling |
Underbody Skid Plates |
Protection from damage |
18-Inch Goodyear Wrangler Duratrac Tires |
Superior grip on all terrain |
6.6L Duramax Turbo-Diesel Engine |
Impressive power and torque |
Grade Braking and Descent Control |
Enhanced safety and maneuverability |
360-Degree Camera System |
Comprehensive visibility |
Unstoppable Adventure: Exploring the Capabilities of the GMC Sierra 2500HD AT4X
1. Introduction
The GMC Sierra 2500HD AT4X is a force to be reckoned with in the world of off-roading and adventure. With its exceptional capabilities and impressive features, this pickup truck is ready to tackle any terrain and conquer any obstacle.
2. Engine and Performance
The AT4X boasts a powerful 6.6-liter Duramax turbo-diesel V8 engine that delivers an astounding 445 horsepower and 910 lb-ft of torque. This combination provides exceptional towing and payload capacities, making it an ideal choice for hauling heavy loads or tackling demanding off-road terrain.
3. Suspension and Off-Roading
The AT4X features a sophisticated suspension system with Multimatic DSSV dampers, which provide exceptional control and stability on even the roughest roads. Its front and rear electronic locking differentials ensure maximum traction in challenging off-road conditions, while a two-speed transfer case and a Terrain Mode Selector allow for optimal performance on a variety of surfaces.
4. Exterior Features
The AT4X’s exterior is designed for both aesthetics and functionality. It features a rugged grille with integrated LED headlamps, aggressive front and rear bumpers, and 18-inch forged aluminum wheels wrapped in 33-inch Goodyear Wrangler Duratrac tires.
5. Interior Comfort and Technology
Despite its rugged exterior, the AT4X offers a comfortable and well-equipped interior. It features heated and ventilated front seats, a premium Bose audio system, and an advanced infotainment system with an 8-inch touchscreen. Various safety features, such as lane departure warning and forward collision alert, are also included to enhance the driving experience.
6. Towing and Payload Capacities
The AT4X’s impressive engine and suspension system translate into exceptional towing and payload capacities. It can haul up to 18,510 pounds and carry a payload of up to 2,970 pounds, making it suitable for a wide range of work and adventure applications.
7. Features for the Adventurer
The AT4X comes equipped with a variety of features designed for adventure-seekers. These include a WARN winch, skid plates, a bed-mounted toolbox, and a unique patent-pending CarbonPro carbon fiber cargo box.
8. Off-Road Technology
The AT4X is equipped with a suite of off-road technologies that enhance its performance in challenging conditions. These include:
- Crawl Mode: Provides precise low-speed control for navigating technical terrain.
- Hill Descent Control: Maintains a consistent speed while descending steep slopes.
- Hill Start Assist: Prevents rollback on steep inclines.
- Head-Up Display: Projects important information onto the windshield for easy viewing.
- Surround-View Camera: Provides a 360-degree view of the vehicle’s surroundings.
- Front and Rear Camera Washers: Keeps the cameras clean for enhanced visibility in muddy conditions.
- Adaptive Cruise Control: Maintains a set speed and distance from the vehicle ahead.
- Off-Road GPS Navigation: Provides detailed off-road maps and trail information.
4-wheel Drive |
2-wheel Drive |
1-speed transfer case |
2-speed transfer case |
Automatic 4×4 |
Rear-wheel drive |
Locking differential |
Locking differential |
Off-Road Excellence Personified: The GMC Sierra 2500HD AT4X in Its Element
The GMC Sierra 2500HD AT4X is a force to be reckoned with when it comes to off-roading. Engineered for unparalleled performance, this heavy-duty pickup truck seamlessly blends rugged capability with advanced technologies, unlocking a world of adventure and pushing the boundaries of off-road excursions.
Unmatched Terrain-Conquering Prowess
The AT4X is equipped with an arsenal of features that empower it to conquer the most challenging terrain. Its robust Multimatic DSSV spool-valve dampers, developed in collaboration with championship-winning off-road racing teams, provide exceptional damping control and stability, ensuring a smooth ride even on the roughest trails.
9. Advanced Off-Road Technology at the Core
The AT4X boasts an impressive array of advanced off-road technologies that elevate its capabilities. Its Terrain Mode selector empowers drivers with the ability to optimize the truck’s performance for specific terrain conditions, offering tailored settings for sand, mud, and rock crawling.
Technology |
Function |
UltraVision Front and Rear Camera System |
Provides a 360-degree view of the surroundings, aiding in navigation and obstacle avoidance |
Head-Up Display with Off-Road Inclinometer |
Displays essential vehicle information and an inclinometer to monitor grade and pitch, enhancing situational awareness |
Hill Descent Control and Traction Select |
Provides controlled descents on steep slopes and optimizes traction on varying surfaces |
Its advanced off-road telemetry system allows drivers to monitor key performance indicators, such as wheel slip, pitch, and roll angles, providing valuable insights for navigating complex terrain.
Unleashing Power and Durability for Off-Road Dominance
Under the hood, the AT4X harnesses the raw power of a turbocharged 6.6-liter Duramax diesel engine, delivering an impressive 910 pound-feet of torque and 450 horsepower. This engine is mated to a 10-speed Allison transmission, ensuring seamless power delivery and maximum control during off-road adventures.
The Future of Off-Roading: GMC Sierra 2500HD AT4X Leads the Charge
Trailering Capabilities
The Sierra 2500HD AT4X boasts a maximum trailering capacity of up to 20,000 pounds when properly equipped. This impressive capability makes it an ideal choice for hauling heavy loads, whether for work or play.
Advanced Trailering Technology
The AT4X comes equipped with a suite of advanced trailering technologies, including:
Feature |
Benefit |
ProGrade Trailering System |
Provides real-time monitoring and control of trailer braking, steering, and sway |
Integrated Trailer Brake Controller |
Intuitively adjusts trailer braking power based on load weight |
Hitch View Camera |
Offers a clear view of the hitch area for easy trailer hook-up |
Trailering App |
Allows remote monitoring of trailer lights, battery level, and tire pressure |
2025 GMC Sierra 2500HD AT4X: An Off-Roading Beast
The 2025 GMC Sierra 2500HD AT4X is a formidable off-roading machine that combines rugged capability with luxurious amenities. Its powerful 6.6-liter Duramax diesel engine delivers exceptional torque and towing capacity, while its advanced Multimatic DSSV dampers provide superior suspension for tackling rough terrain.
The AT4X package includes exclusive features such as 35-inch tires, electronic locking differentials, a front winch, and a skid plate package. These enhancements allow the truck to conquer challenging obstacles and navigate extreme conditions with ease.
Despite its rugged exterior, the Sierra 2500HD AT4X offers a comfortable and well-appointed interior. It features leather upholstery, heated and ventilated seats, a 12-inch touchscreen, and a premium sound system. This combination of capability and luxury makes the AT4X an ideal choice for both off-road enthusiasts and daily drivers.
People Also Ask About the 2025 GMC Sierra 2500HD AT4X
What is the towing capacity of the Sierra 2500HD AT4X?
The Sierra 2500HD AT4X has a maximum towing capacity of 22,500 pounds.
Does the AT4X package include Apple CarPlay and Android Auto?
Yes, the AT4X package includes Apple CarPlay and Android Auto integration.
What is the fuel economy of the Sierra 2500HD AT4X?
The fuel economy of the Sierra 2500HD AT4X is estimated to be 16 mpg in the city and 21 mpg on the highway.
Does the AT4X package include a sunroof?
No, the AT4X package does not include a sunroof.