The 2025 GMC Sierra HD is designed for superior performance, offering powerful engine options that provide exceptional towing and hauling capabilities. You can choose between the 6.6L gas V8 or the Duramax® 6.6L Turbo-Diesel, which delivers an impressive 910 lb.-ft. of torque and supports a maximum towing capacity of 36,000 lbs. Both engines are paired with the Allison® 10-speed automatic transmission, ensuring smooth gear shifts and optimal efficiency on any drive.

Beyond raw power, the Sierra HD comes equipped with performance-enhancing features like available four-wheel drive, advanced suspension systems, and off-road packages tailored for rough terrains. Whether you're towing heavy loads or tackling difficult landscapes, the Sierra HD's features are engineered to ensure that you complete your tasks with efficiency and safety.

• 6.6L V8 and Duramax® 6.6L Turbo-Diesel engines
• 910 lb.-ft. of torque
• Up to 36,000 lbs. towing capacity
• Allison® 10-speed automatic transmission
• Available four-wheel drive
• Advanced suspension systems

The 2025 GMC Sierra HD is packed with advanced technology to improve convenience, connectivity, and control. A highlight is its large 13.4-inch touchscreen, which offers seamless integration with wireless Apple CarPlay® and Android Auto™, making it easy to connect your smartphone. Drivers can also take advantage of the available 12.3-inch digital driver information center, which provides real-time data and important vehicle details right at a glance.

For enhanced towing assistance, the Sierra HD includes the available ProGrade™ Trailering System, which offers up to 15 camera views to give drivers better visibility and confidence while towing. With its cutting-edge tech features, the Sierra HD keeps you connected, informed, and fully in control.

• 13.4-inch touchscreen infotainment system
• Wireless Apple CarPlay® and Android Auto™
• 12.3-inch digital driver information center
• ProGrade™ Trailering System with 15 camera views
• Premium Bose® audio system
• Built-in Wi-Fi hotspot

The 2025 GMC Sierra HD prioritizes safety with a suite of advanced driver-assistance features designed to protect you and your passengers. Standard with the GMC Pro Safety package, it includes key features like Forward Collision Alert, Automatic Emergency Braking, and Lane Departure Warning, all aimed at helping you avoid potential accidents before they occur.

For added protection, available options such as the HD Surround Vision Camera and Rear Cross Traffic Alert improve visibility and situational awareness, especially useful when towing or maneuvering in tight spaces. These extensive safety features work together to ensure that every journey in the Sierra HD is as secure as possible.

• GMC Pro Safety package
• Forward Collision Alert
• Automatic Emergency Braking
• Lane Departure Warning
• HD Surround Vision Camera
• Rear Cross Traffic Alert

The interior of the 2025 GMC Sierra HD seamlessly blends luxury, comfort, and practicality, making it ideal for those who spend a lot of time on the road. With spacious seating, the cabin boasts premium materials such as available leather-appointed seats, wood accents, and a versatile center console that adapts to your storage needs. Offering best-in-class front head and legroom, the Sierra HD ensures a comfortable experience for both drivers and passengers on every journey.

Beyond comfort, the interior also includes useful features like an available power-sliding rear window and multiple USB charging ports, allowing you to stay organized and connected. Whether it's for daily commutes or long road trips, the Sierra HD's interior is thoughtfully designed to deliver both comfort and functionality.