2025 GMC Sierra 1500 Engine Differences

With a range of robust engine choices, the 2025 GMC Sierra 1500 has the power and efficiency you need to tackle your toughest endeavors. Which is the best one for you? Choose from a multitude of powerful engines, including V8, turbocharged, and diesel options to achieve the performance and capability to help you get the job done.

2.7L TurboMax™

Delivering exceptional power, the TurboMax™ engine in the GMC Sierra 1500 boasts 310 horsepower and 430 pound-feet of torque, matched with an eight-speed automatic transmission. Engineered to handle the toughest demands, the 2.7 TurboMax provides exceptional performance and capability, and supports the highest payload capacity of the Sierra 1500 trim lineup at 2,260 pounds.

5.3L EcoTec3 V8

The 5.3L EcoTec3 V8 engine packs a punch with its 355 horsepower and 11,300-pound towing capacity, offering impressive power and versatility wherever the Sierra 1500 goes. Featuring variable valve timing and Dynamic Fuel Management, the 5.3L V8 optimizes fuel efficiency while maintaining the formidable power needed for your more challenging tasks.

3.0L Duramax® turbo diesel I6

Do you demand exceptional power, efficiency, and capability in the Sierra 1500? The 3.0L Duramax® inline six-cylinder (I6) engine sets the standard. Driven by a formidable 495 pound-feet of torque at just 1,500 RPM, this powerhouse tows up to 13,300 pounds with ease.

6.2L EcoTec3 V8

Dominating the Sierra 1500 lineup is the 6.2L EcoTec3 V8, unleashing 420 horsepower across its higher-end trim levels. Its relentless 13,200-pound towing capability is comparable to the turbo-diesel configuration. Engineered with advanced variable valve timing and Dynamic Fuel Management, this naturally aspirated powerhouse optimizes performance without compromise.

Compare all four GMC Sierra 1500 engines in the accompanying chart.

2025 GMC Sierra 1500 Engine Model Availability

Now that you understand the differences of each engine configuration, discover how each aligns with every 2025 GMC Sierra 1500 trim. The 2.7L TurboMax comes standard on entry-level trims, while the 5.3L V8 powers mid-range options. Off-road capable trims are paired with the 3.0L Duramax I6. For high-end luxury trims, the 6.2L V8 delivers premium performance.

See which Sierra 1500 trims are standard and available with each engine.

2.7L TurboMax

Standard Trims: Pro, SLE, Elevation

5.3L EcoTec3 V8

Standard Trims: SLT, Denali
Available Trims: Pro, Elevation

3.0L Duramax I6

Standard Trims: AT4, AT4X
Available Trims: Elevation, SLT, Denali, Denali Ultimate

6.2L EcoTec3 V8

Standard Trims: Denali Ultimate
Available Trims: SLT, AT4, AT4X, Denali

2025 GMC Sierra 1500 Learn More About the 2025 GMC Sierra 1500

Powerful performance is what you will find in each of the four engine options available with the 2025 GMC Sierra 1500. McGonigal Buick GMC has prepared a selection of helpful research tools to assist you in making an informed decision. Our comprehensive Sierra 1500 review provides an in-depth overview of key features, including interior amenities, exterior color options, and advanced technology features. Learn more about the standard equipment in each of the available trim levels using the detailed lists of features on our Sierra 1500 trims page.