2026 GMC Sierra 2500 Engine Options
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2026 GMC Sierra 2500 Engine Options
The 2026 GMC Sierra 2500 offers powerful engine options designed to meet the needs of drivers who require serious performance, towing strength, and long term durability. Built with professional grade engineering, this heavy duty truck provides the capability needed to handle demanding workloads while maintaining smooth and controlled performance. At our dealership in Tinley Park, IL, we help drivers explore the available engine options so they can select the right balance of power, efficiency, and capability.
Both available engines in the 2026 GMC Sierra 2500 are paired with an advanced 10 speed Allison automatic transmission. This transmission is designed to provide smooth shifting, improved efficiency, and consistent power delivery under load. Whether towing heavy trailers or carrying large payloads, the engine lineup delivers dependable strength and performance.
6.6L V8 Gas Engine 🡫
The standard engine in the 2026 GMC Sierra 2500 is a 6.6 liter V8 gas engine designed to deliver reliable and consistent performance. This engine produces 401 horsepower and 464 lb ft of torque, providing the strength needed for hauling cargo, towing equipment, and handling daily driving tasks. The high horsepower output allows the truck to accelerate confidently even when carrying heavy loads, while the strong torque rating supports hauling and towing performance.
Paired with the Allison 10 speed automatic transmission, this engine delivers smooth gear changes and optimized power delivery. The advanced transmission helps improve performance by maintaining the ideal gear ratio based on driving conditions. This ensures the 2026 GMC Sierra 2500 performs efficiently whether driving on highways, navigating city streets, or working on demanding job sites.
- 6.6 liter V8 gas engine producing 401 horsepower
- 464 lb ft of torque for strong hauling capability
- Allison 10 speed automatic transmission for smooth shifting
- Engine designed for durability and heavy duty performance
- Reliable performance for both work and everyday driving
Duramax 6.6L Turbo-Diesel V8🡫
The available Duramax 6.6 liter turbo diesel V8 engine provides exceptional power and towing capability for drivers who require maximum performance. This engine produces 470 horsepower and an impressive 975 lb ft of torque. The high torque output is especially important for towing because it provides strong pulling power at lower engine speeds, allowing the truck to move heavy trailers more efficiently and with greater control.
This engine is also paired with the Allison 10 speed automatic transmission, which enhances performance by optimizing gear selection and delivering smooth power transitions. The Duramax diesel engine allows the 2026 GMC Sierra 2500 to achieve a maximum towing capacity of up to 21,870 pounds when properly equipped. This makes it an excellent choice for towing large trailers, construction equipment, or recreational vehicles.
- Duramax 6.6 liter turbo diesel V8 engine producing 470 horsepower
- 975 lb ft of torque for exceptional towing strength
- Allison 10 speed automatic transmission
- Maximum towing capacity of up to 21,870 pounds when properly equipped
- Designed for heavy duty towing and hauling performance
Why Buy From Tony Rizza Buick GMC in Tinley Park, IL?
When you shop with us at Tony Rizza Buick GMC in Tinley Park, IL, you gain access to a knowledgeable team dedicated to helping you find the right truck for your needs. We proudly offer a wide selection of new GMC trucks, including the powerful and capable 2026 GMC Sierra 2500. Our team is here to guide you through available engine options, trims, and features so you can choose the truck that fits your performance and capability requirements.
We are committed to providing exceptional service throughout your entire ownership experience. From competitive pricing and flexible financing options to expert maintenance and service support, we work to ensure your complete satisfaction. Visit us today to explore our inventory and discover why so many drivers trust our dealership for their next GMC truck.