2025 GMC Sierra 1500 Engine Specs

The 2025 GMC Sierra 1500 engine options and GMC Sierra 1500 towing capacity provide San Antonio drivers with everything they need to work miracles at the job site. If you’re considering a Sierra 1500, explore key 2025 GMC Sierra 1500 specs, including the 2025 GMC Sierra 1500 mpg ratings. Then, fill out a secure finance application and swing by Ancira Buick GMC to experience the GMC Sierra in action in Boerne! 

2025 GMC Sierra 1500 Engine Options

In total, there are four powertrains for our Comfort neighbors to consider. The 2025 GMC Sierra 1500 towing capacity and other GMC Sierra 1500 specs vary, depending on which engine you equip your Sierra with. Let’s compare the 2025 GMC Sierra 1500 engine specs and trim compatibility for each powertrain: 

2.7L TurboMax™ I4 Engine

Available On: Pro, SLE, Elevation

• Horsepower: 310 hp

• Torque: 430 lb-ft

• Max Towing Capacity: 9,500 pounds

• Transmission: 8-speed automatic transmission

5.3L EcoTec3 V8 Gas Engine

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

• Horsepower: 355 hp

• Torque: 383 lb-ft

• Max Towing Capacity: 11,200 pounds

• Transmission: 10-speed automatic transmission

Duramax® 3.0L Turbo Diesel I6 Engine

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

• Horsepower: 305 hp

• Torque: 495 lb-ft

• Max Towing Capacity: 13,200 pounds

• Transmission: 10-speed automatic transmission

6.2L EcoTec3 V8 Gas Engine

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

• Horsepower: 420 hp

• Torque: 460 lb-ft

• Max Towing Capacity: 13,000 pounds

• Transmission: 10-speed automatic transmission

2025 GMC Sierra 1500 MPG Ratings 

While the 2025 GMC Sierra 1500 engine options are remarkably powerful, you’ll be surprised when you view the GMC Sierra 1500 mpg ratings below. They’re exceptionally efficient for the half-ton truck segment. 

• 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 Options! 

Come experience the 2025 GMC Sierra 1500 engine specs in action near Kerrville when you test-drive the 2025 GMC Sierra 1500 trims at Ancira Buick GMC. If you have questions about the 2025 GMC Sierra 1500 towing capacity or 2025 GMC Sierra 1500 mpg ratings before you head over, call us at (830) 266-5210. Also, be sure to explore our GMC information guides for other helpful reads on topics, like the 2025 GMC Sierra 1500 interior and more!