2025 GMC Sierra 1500 Engine Specs

The GMC Sierra 1500 has long been celebrated for its exceptional power and capabilities in Houston, so what are the GMC Sierra 1500 engine specs for 2025? The latest engine specs continue to impress with top-notch output and impressive efficiency. The result is a powerhouse ride that won’t let you down in Porter or New Caney. Let’s explore the GMC Sierra 1500 towing capacity, horsepower, mpg, and more to see what this model can do for you.

2025 GMC Sierra 1500 Engine Options  

Starting with the basics, what are the 2025 GMC Sierra 1500 engine options? There are four distinctively different GMC Sierra 1500 engine options to explore. Whether you choose the EcoTec3 or the turbo-diesel I6, you’re in for a real treat in Humble. All models deliver the grit that you need on the road, along with smooth handling for one spectacular ride. Compare the 2025 GMC Sierra 1500 engine specs across the board:

2.7L TurboMax™ I4 Engine

Available On: Pro, SLE, Elevation

• GMC Sierra 1500 Horsepower: 310 hp

• GMC Sierra 1500 Torque: 430 lb-ft

• GMC Sierra 1500 Towing Capacity: 9,500 pounds

• GMC Sierra 1500 Transmission: 8-speed automatic transmission

5.3L EcoTec3 V8 Gas Engine

Available On: Pro, SLE, Elevation, SLT. Denali

• GMC Sierra 1500 Horsepower: 355 hp

• GMC Sierra 1500 Torque: 383 lb-ft

• GMC Sierra 1500 Towing Capacity: 11,200 pounds

• GMC Sierra 1500 Transmission: 10-speed automatic transmission

Duramax® 3.0L Turbo Diesel I6 Engine

Available On: SLE, Elevation, SLT, Denali, AT4, AT4X, Denali Ultimate

• GMC Sierra 1500 Horsepower: 305 hp

• GMC Sierra 1500 Torque: 495 lb-ft

• GMC Sierra 1500 Towing Capacity: 13,200 pounds

• GMC Sierra 1500 Transmission: 10-speed automatic transmission

6.2L EcoTec3 V8 Gas Engine

Available On: SLT, Denali, AT4, AT4X, Denali Ultimate

• GMC Sierra 1500 Horsepower: 420 hp

• GMC Sierra 1500 Torque: 460 lb-ft

• GMC Sierra 1500 Towing Capacity: 13,000 pounds

• GMC Sierra 1500 Transmission: 10-speed automatic transmission

2025 GMC Sierra 1500 MPG Ratings 

Next, what are the GMC Sierra 1500 mpg ratings? Though this model is exceptionally powerful, you might be surprised at just how efficient it is. That means you don’t have to sacrifice gas mileage for performance when you go on your next big adventure. Compare the GMC Sierra 1500 mpg ratings for yourself:

• Pro: 18 mpg city/21 mpg highway

• SLE: 18 mpg city/21 mpg highway

• Elevation: 18 mpg city/21 mpg highway

• SLT: 16 mpg city/20 mpg highway

• AT4: 22 mpg city/26 mpg highway

• Denali: 16 mpg city/20 mpg highway

• AT4X: 19 mpg city/20 mpg highway

• Denali Ultimate: 15 mpg city/19 mpg highway

Experience the 2025 GMC Sierra 1500 Engine Specs in Humble 

Now you’ve gotten a primer on the latest GMC Sierra 1500 specs, but that’s just the beginning. Experience the immense power and phenomenal handling of this best-selling pickup, and find your next truck at Texan GMC Buick today. Contact us for more information or just stop by the showroom to take a test drive. We’d be happy to get the keys in your hand and discuss your financing options.