2026 GMC Sierra 2500 HD Performance

The 2026 GMC Sierra 2500 is an HD truck that provides drivers throughout Duncan and the surrounding areas with the power and performance they need to accomplish more. If you are interested in this model, learn about the new GMC Sierra 2500 specs today! Our guide reviews the new GMC Sierra engine options to help you decide whether to schedule a test drive at our dealership in Chickasha. Contact John Holt GMC to schedule an appointment, and let us know if you have any questions.

New GMC Sierra 2500 Engine Options And Specs

The new GMC Sierra 2500 specs impress, regardless of which engine your selected trim level includes. The available Duramax® diesel engine is standard on the Denali Ultimate and available on the Pro, SLE, SLT, AT4, and AT4. Check out the specs for each engine below as you consider your work and play needs in Lawton and the nearby communities:

6.6L V8 Gas Engine

• Horsepower: 401
• Torque: 464 lb-ft
• Transmission: 10-speed automatic

Duramax® 6.6L Turbo-Diesel V8

• Horsepower: 470
• Torque: 975 lb-ft
• Transmission: 10-speed automatic
• Towing Capacity: 22,390 pounds*

The above towing capacity requires a 2500 HD Regular Cab long bed 2WD model that includes the available Duramax® 6.6L Turbo-Diesel V8 engine, Max Trailering Package, and other appropriate equipment. Other configurations also offer impressive towing capabilities, such as the GMC Sierra 2500 HD Crew Cab, which features an available max tow rating of up to 21,870 pounds.**

New GMC Sierra 2500 Standard And Available Performance Features

Whether you’re driving in Blanchard or anywhere else, the GMC Sierra 2500 includes features that make every ride safer and more enjoyable. Check out standard and available performance features across the configurations:

• Adaptive Cruise Control with Trailering
• Up to 13 camera views, including transparent trailer view
• MultiPro™ Tailgate and MultiPro Tailgate Audio System by Kicker®
• X31 off-road package with twin-tube Rancho® shocks and skid plates
• Auxiliary trailer camera
• Forward Collision Alert
• Following Distance Indicator
• Front Pedestrian Braking
• IntelliBeam
• Lane Departure Warning
• Automatic Emergency Braking
• Buckle to Drive
• And more!

Experience The New GMC Sierra 2500 Specs At John Holt GMC

Do you have questions about the new GMC Sierra 2500 engine options? Are you ready to take a test drive at our dealership in Chickasha? Call 405-224-0475 or contact us online today. For more helpful reads about GMC vehicles, please browse our manufacturer research.

*Requires a 2500 HD Regular Cab long bed 2WD model with available Duramax 6.6L Turbo-Diesel V8 engine, Max Trailering Package, Gooseneck/Fifth-Wheel Prep Package and gooseneck/fifth-wheel hitch. Maximum trailering ratings are intended for comparison purposes only. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The trailering capacity of your specific vehicle may vary. The weight of passengers, cargo and options or accessories may reduce the amount you can trailer.

**Requires a Crew Cab long bed 2WD model with available Duramax 6.6L Turbo-Diesel V8 engine, Max Trailering package, Gooseneck/Fifth-Wheel Prep Package, 18-inch or 20-inch wheels and tires and gooseneck/fifth-wheel hitch. Maximum trailering ratings are intended for comparison purposes only. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The trailering capacity of your specific vehicle may vary. The weight of passengers, cargo and options or accessories may reduce the amount you can trailer.