The 2026 GMC Sierra 3500 delivers outstanding towing capability, reaching a maximum towing capacity of up to 36,000 pounds when properly equipped. This exceptional towing strength makes it ideal for hauling large trailers, heavy equipment, livestock trailers, or recreational vehicles. The available Duramax 6.6 liter turbo diesel V8 engine plays a key role in delivering this capability, producing 470 horsepower and an impressive 975 lb ft of torque. This high torque output provides the low end pulling power needed to move extremely heavy loads efficiently and with confidence.

The Sierra 3500 also offers a standard 6.6 liter V8 gas engine paired with an Allison 10 speed automatic transmission. This advanced transmission optimizes power delivery and ensures smooth gear transitions while towing or hauling. Together, these engine and transmission combinations allow the truck to maintain stability, control, and performance in demanding towing situations.

• Maximum towing capacity of up to 36,000 pounds when properly equipped
• Available Duramax 6.6 liter turbo diesel V8 with 470 horsepower and 975 lb ft of torque
• Standard 6.6 liter V8 gas engine paired with Allison 10 speed automatic transmission
• Reinforced heavy duty frame engineered for maximum towing strength
• Advanced trailering technologies to enhance towing safety and confidence

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The 2026 GMC Sierra 3500 includes advanced trailering and performance technologies designed to improve towing control, safety, and convenience. The available ProGrade Trailering System offers integrated tools such as an in vehicle trailering app that allows drivers to create trailer profiles, perform system checks, and monitor trailer performance. This system enhances towing efficiency and ensures equipment is properly configured.

The truck also offers up to 14 available camera views, including Transparent Trailer View, which allows drivers to see behind their trailer. This improves visibility when maneuvering in tight spaces or reversing. Tow Haul mode further enhances towing performance by optimizing transmission shift patterns to maintain consistent power and control.

• Available ProGrade Trailering System with integrated trailering app
• Up to 14 available camera views including Transparent Trailer View
• Tow Haul mode for optimized transmission performance while towing
• Available integrated trailer brake controller
• Available Adaptive Cruise Control with trailering capability

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The 2026 GMC Sierra 3500 offers a highly functional cargo bed designed for maximum utility and durability. It is available with both a standard bed measuring approximately 82.25 inches and a long bed measuring approximately 98.27 inches. The available long bed provides increased cargo capacity, allowing drivers to transport larger equipment, construction materials, and oversized cargo with ease.

The available MultiPro Tailgate enhances cargo accessibility by offering multiple functional configurations that make loading, unloading, and accessing the cargo bed easier. This innovative design improves overall convenience and efficiency. Combined with heavy duty construction and thoughtful design, the Sierra 3500 cargo bed provides the durability and flexibility needed for professional and personal use.

• Standard cargo bed length of approximately 82.25 inches
• Available long cargo bed length of approximately 98.27 inches
• Available MultiPro Tailgate with multiple functional positions
• Durable heavy duty cargo bed construction
• Spacious bed designed for transporting large and heavy cargo

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