When you need a truck in Kansas City that works as hard as you do, the 2026 GMC Sierra 2500 HD is ready. If you are hauling heavy equipment to a job site, towing your fifth-wheel, or just need a reliable truck for the daily duties, the 2026 GMC Sierra 2500 HD delivers confident performance.
For the 2026 model year, GMC gives you two powerful engine options in gas and diesel options. Let’s break down the specs.
6.6L V8 Gas Engine
For drivers who want traditional gas power without sacrificing capability, the standard 6.6L V8 is a powerful option. The gas 6.6L V8 is an excellent choice for daily driving and standard towing duties.
- Horsepower: 401 hp
- Torque: 464 lb-ft
- Rear Axle Ratio: 3.73
- Transmission: Paired with an Allison® 10-speed automatic transmission
- Fuel System: Capless fuel fill for easier fill-ups
Duramax 6.6L Turbo-Diesel V8
If your day involves heavy towing or hauling heavy payloads, the available Duramax Diesel is a great available option. This engine offers massive torque for effortless pulling power.
- Availability: Standard on Denali Ultimate; Available on Pro, SLE, SLT, AT4, AT4X, and Denali.
- Horsepower: 470 hp
- Torque: 975 lb-ft
- Rear Axle Ratio: 3.42
- Cooling: Engine after-run feature for cooling performance and engine block heater
- Braking: Exhaust brake included
- Fuel System: Capped fuel fill with Diesel Exhaust Fluid (DEF) fill located in the fuel door
- Transmission: Paired with an Allison® 10-speed automatic transmission
- Note: May require additional optional equipment.
Allison® 10-Speed Automatic Transmission
Both engine options in the 2026 Sierra 2500 HD are paired with the world-class Allison® 10-speed automatic transmission, allowing you to maintain control and improve efficiency when towing.
- Tow/Haul Mode: Reduces shift cycling for better control and improved cooling when towing or hauling heavy loads.
- Auto Grade Braking: Automatically downshifts when needed to enable engine braking, helping to slow the vehicle on downhill grades and reduce brake wear.
- Electronically Controlled: Features overdrive for smooth highway cruising.
Towing Capacity That Matters
Kansas City truck owners know that torque numbers are great, but real-world towing capability is what counts. The 2026 Sierra 2500 HD is built to handle heavy towing.
The GMC Sierra 2500 HD Crew Cab offers available max towing of up to 21,870 lbs.*
Find Your 2026 Sierra 2500 in Kansas City Today
Ready to find your new GMC Sierra 2500 HD? At Cable Dahmer Buick GMC of Kansas City, we carry a great selection of new GMC Sierra 2500 models for sale.
Contact us and visit our showroom today to test drive the new heavy-duty GMC Sierra lineup.
*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″ or 20″ 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.
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