2025 GMC Sierra 1500 Engine Specs

Are you considering a new pickup for your San Antonio business or weekend adventures past the New Braunfels area? You probably want to know more about the 2025 GMC Sierra 1500 engine options. Explore the 2025 GMC Sierra 1500 specs, including the GMC Sierra 1500 mpg ratings and GMC Sierra 1500 towing capacity in this guide from the team at Gunn Buick GMC in Selma!

2025 GMC Sierra 1500 Engine Options

In total, there are four powertrains for our Schertz 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, including the tow rating of the GMC Sierra 1500, 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! 

Now that you know more about the 2025 GMC Sierra 1500 specs, including the GMC Sierra 1500 towing capacity by engine option, it’s time to experience this impressive pickup firsthand. Contact us today to schedule your test drive of a new GMC Sierra 1500 at Gunn Buick GMC! Our team will review all the available engine options, cab and bed styles, and trim levels to ensure you find the perfect combination for your Cibolo lifestyle. Use our online tools to get pre-approved for financing online, value your trade-in, and browse our new vehicle specials before you visit our Selma showroom today!