2026 GMC Sierra 3500 Towing Capacity

What is the towing capacity of the GMC Sierra 3500 HD? When properly equipped with a gooseneck hitch and the Duramax diesel engine, this heavy-duty truck can tow up to 36,000 pounds. Whether you’re hauling heavy machinery to a Willoughby worksite or pulling a large horse trailer across the state on the weekend, the 2026 Sierra 3500 provides the uncompromising pull you need. In addition to the maximum towing capacity, other key specs include:

• Maximum Available GCWR: 43,900 pounds
• Maximum Available Payload: 7,290 pounds
• Maximum Available GVWR: 14,000 pounds

Read on to explore the engine options and advanced towing technologies that make the new GMC Sierra 3500 HD a leader in its class.

2026 GMC Sierra 3500 Engines

This heavy-duty Sierra model is available with two formidable engine options, both paired with the legendary Allison® 10-speed automatic transmission. While the standard gas engine offers incredible responsiveness, the Duramax diesel is the go-to for drivers in Mentor who require maximum torque for the heaviest loads.

6.6L V8 Gas Engine

• 401 hp and 464 lb-ft of torque
• Paired with an Allison® 10-speed automatic transmission
• Ideal for mixed-use duty and consistent payload hauling

6.6L Duramax Turbo-Diesel V8 Engine

• 470 hp and a massive 975 lb-ft of torque
• Paired with an Allison® 10-speed automatic transmission (available with Power Take-Off)
• Features an integrated exhaust brake for enhanced control on steep Madison grades

2026 GMC Sierra 3500 Towing Features

Raw power is only half the story. The 2026 GMC Sierra 3500 HD is packed with intelligent trailering technologies designed to make every haul safer and more intuitive. Explore the features that set this GMC truck apart:

• ProGrade Trailering System: A comprehensive suite of tools, including Hitch Guidance with Hitch View, to streamline the connection process.
• Up to 14 Available Camera Views: Includes the industry-first Transparent Trailer View, allowing you to “see through” your trailer for better awareness on the highway.
• Adaptive Cruise Control with Trailering: An optional system that automatically adjusts following distances to account for the additional drag and braking length of your trailer.
• In-Vehicle Trailering App: Create custom trailer profiles, run light tests, and receive maintenance reminders directly on your 13.4-inch infotainment screen.

Explore The Sierra 3500 HD Further With Classic Buick GMC

Are you ready to experience the professional-grade power of the 2026 GMC Sierra 3500 for yourself? From the rugged AT4 to the luxurious Denali Ultimate, our team is here to help you find the perfect configuration for your lifestyle. Contact us today to schedule a test drive, or get a head start on the buying process by completing our secure online financing application. We look forward to seeing you at our Painesville dealership!