2026 GMC Sierra HD Performance

If you’ve been looking for a heavy-duty work truck near Early, a 2026 GMC Sierra HD is an excellent option. Available in two grades—the 2500 HD and 3500 HD—plus a panoply of configurations and trim levels, the Sierra HD pairs capability with comfort.

In this overview of the Sierra HD performance, the team at Bayer Buick GMC will cover the GMC Sierra HD towing capacity and engine choices, including the GMC Sierra HD diesel and gasoline engines. Keep reading below to learn more about the 2026 Sierra HD capabilities, then contact us to schedule a test-drive in Comanche.

What Engines Are Available For The 2026 GMC Sierra HD?

The engines available for the 2026 GMC Sierra HD near Eastland include a standard 6.6L V8 gasoline engine and an available 6.6L Duramax V8 Turbo-Diesel engine that maximizes torque for extra-large loads. See the comparison between the GMC Sierra HD diesel and gasoline engines below.

6.6L V8 Engine

• Horsepower: 401 hp
• Torque: 464 lb-ft
• Rear axle ratio: 3.73
• Transmission: Allison® 10-speed automatic

6.6L Duramax V8 Turbo-Diesel Engine

• Horsepower: 470 hp
• Torque: 975 lb-ft
• Rear axle ratio: 3.42
• Transmission: Allison® 10-speed automatic
• Exhaust brake
• Engine block heater
• Capped fuel fill
• Engine after-run feature for cooling performance

What Is The 2026 GMC Sierra HD Towing Capacity?

The 2026 GMC Sierra HD towing capacity is among the best in its class, offering up to 22,390 pounds of gooseneck trailering on 2500 HD configurations and up to 36,000 pounds on 3500 HD configurations near Stephenville. With tech features like the available ProGrade® trailering system, up to 13 available camera views, and more, it makes a strong case for being your go-to for trailering and towing. Explore all the towing specs for the Sierra HD below:

Sierra 2500 HD Crew Cab – Pro, SLE, SLT

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 21,870 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 3,863 pounds

Sierra 2500 HD Double Cab – Pro, SLE, SLT

• Max Available Conventional Trailering: 17,900 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 18,600 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 3,848 pounds

Sierra 2500 HD Pro, SLE, SLT Regular Cab

• Max Available Conventional Trailering: 14,500 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 22,390 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 4,049 pounds

Sierra 3500 HD Pro, SLE, SLT Crew Cab

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 31,440 pounds
• Max Available GCWR: 40,000 pounds
• Max Available Payload: 6,658 pounds

Sierra 3500 HD Pro, SLE, SLT Double Cab

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 31,580 pounds
• Max Available GCWR: 40,000 pounds
• Max Available Payload: 6,820 pounds

Sierra 3500 HD Pro, SLE, SLT Regular Cab

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 36,000 pounds / 32,000 pounds
• Max Available GCWR: 43,900 pounds
• Max Available Payload: 7,290 pounds

Sierra 2500 HD AT4

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 21,190 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 3,524 pounds

Sierra 2500 HD AT4X

• Max Available Conventional Trailering: 18,500 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 18,000 pounds
• Max Available GCWR: 27,500 pounds
• Max Available Payload: 3,304 pounds

Sierra 3500 HD AT4

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 21,300 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 4,127 pounds

Sierra 2500 HD Denali

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 19,900 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 3,812 pounds

Sierra 2500 HD Denali Ultimate

• Max Available Conventional Trailering: 20,000 pounds
• Max Available Gooseneck/5th-Wheel Trailering: 19,300 pounds
• Max Available GCWR: 30,000 pounds
• Max Available Payload: 3,153 pounds

How Can I Find My GMC Sierra HD Work Truck At Bayer Buick GMC?

You can find your GMC Sierra HD work truck at Bayer Buick GMC by calling (855) 813-2636 to schedule a test-drive or stopping by our Comanche showroom at your convenience to explore our new inventory. In the meantime, be sure to apply for financing online and get a trade-in estimate for your current vehicle. Don’t forget to check out our new vehicle specials as well.

Frequently Asked Questions

What are the horsepower and torque ratings of the 6.6L Duramax V8 Turbo-Diesel engine?

The available 6.6L Duramax V8 Turbo-Diesel engine produces 470 horsepower and 975 lb-ft of torque.

What is the maximum conventional trailering capacity for the Sierra 3500 HD?

The Sierra 3500 HD Crew Cab, Double Cab, and Regular Cab configurations each offer a maximum available conventional trailering capacity of up to 20,000 pounds.

What trailering assistance technology is available on the 2026 GMC Sierra HD?

The GMC Sierra HD offers advanced trailering features such as the available ProGrade® trailering system and up to 13 available camera views to simplify trailering and towing.