2026 GMC Sierra 1500 Engine Specs

From daily driving to heavy-duty hauling, there’s precious little that the 2026 GMC Sierra 1500 can’t do for the Early driver. Available in eight unique trims from the baseline Pro to the off-road-ready AT4X and the mighty Denali Ultimate, and powered by no fewer than four engines, the 2026 GMC Sierra 1500 lineup is as formidable as it is versatile. Learn more about the specs of the GMC Sierra 1500 with Bayer Buick GMC here, then visit our dealership in Comanche to tour our inventory.

What Engines Are Available For The 2026 GMC Sierra 1500?

The 2026 GMC Sierra 1500 engine options include a 2.7L TurboMax™ engine, a 5.3L EcoTec3 V8, a 6.2L EcoTec3 V8, and the torque-heavy, diesel-powered 3.0L Duramax® engine. Review your engine options below, and contact us if you have any questions:

What Specs Define The 2.7L 4-Cylinder TurboMax™ Engine?

The specs that define the 2.7L 4-Cylinder TurboMax™ engine include 310 horsepower, 430 lb-ft of torque, and an 8-speed automatic transmission.

• 8-speed automatic transmission
• 310 hp
• 430 lb-ft of torque
• Available Max Tow Up To 9,400 pounds

What Specs Define The 5.3L EcoTec3 V8 Engine?

The specs that define the 5.3L EcoTec3 V8 engine include 355 horsepower, 383 lb-ft of torque, and a 10-speed automatic transmission.

• 10-speed automatic transmission
• 355 hp
• 383 lb-ft of torque
• Available Max Tow Up To 11,200 pounds

What Specs Define The 6.2L EcoTec3 V8 Engine?

The specs that define the 6.2L EcoTec3 V8 engine include 420 horsepower, 460 lb-ft of torque, and a 10-speed automatic transmission.

• 10-speed automatic transmission
• 420 hp
• 460 lb-ft of torque
• Available Max Tow Up To 13,100 pounds

What Specs Define The Duramax® 3.0L 6-Cylinder Turbo Diesel Engine?

The specs that define the Duramax® 3.0L 6-Cylinder Turbo Diesel engine include 305 horsepower, 495 lb-ft of torque, and a 10-speed automatic transmission.

• 10-speed automatic transmission
• 305 hp
• 495 lb-ft of torque
• Available Max Tow Up To 13,300 pounds

If you plan to lease or finance a 2026 GMC Sierra 1500 to do heavy-duty towing, check out our comprehensive 2026 Sierra 1500 towing guide for more information. You can also drop by and speak with our service technicians to get a gauge on the capabilities of this powerful lineup.

How Fuel-Efficient Is The 2026 GMC Sierra 1500?

The fuel efficiency of the 2026 GMC Sierra 1500 varies based on your chosen engine and drivetrain configuration. Here’s a quick breakdown of the GMC Sierra 1500 mpg ratings:

What Is The MPG Rating For The 2.7L 4-Cylinder TurboMax™ Engine?

The MPG rating for the 2.7L 4-Cylinder TurboMax™ engine is up to 18 city / 21 highway mpg.

• Up to 18 city / 21 highway mpg

What Is The MPG Rating For The 5.3L EcoTec3 V8 Engine?

The MPG rating for the 5.3L EcoTec3 V8 engine is up to 16 city / 20 highway mpg.

• Up to 16 city / 20 highway mpg

What Is The MPG Rating For The 6.2L EcoTec3 V8 Engine?

The MPG rating for the 6.2L EcoTec3 V8 engine is up to 15 city / 19 highway mpg.

• Up to 15 city / 19 highway mpg

What Is The MPG Rating For The Duramax® 3.0L 6-Cylinder Turbo Diesel Engine?

The MPG rating for the Duramax® 3.0L 6-Cylinder Turbo Diesel engine is up to 21 city / 24 highway mpg.

• Up to 21 city / 24 highway mpg

Generally, 2WD variants of the 2026 GMC Sierra 1500 achieve slightly better fuel mileage than their 4WD counterparts due to several factors. These include weight (4WD systems are generally heavier) and the fact that more complex 4WD systems have more points of contact within the drivetrain, which creates friction and ultimately reduces the vehicle’s overall fuel efficiency. To learn more about the fuel economy of the 2026 GMC Sierra 1500, visit our dealership near Stephenville or call us at %%sales_phone%% to speak with our knowledgeable associates.

How Can You Explore The 2026 GMC Sierra 1500 With Bayer Buick GMC?

You can explore the versatile 2026 GMC Sierra 1500 with Bayer Buick GMC by visiting our dealership near Eastland today for an in-person test drive. In the meantime, be sure to apply for financing online and get a trade-in estimate for your current vehicle. Don’t forget to check out our new vehicle specials as well.

Frequently Asked Questions

What is the maximum towing capacity of the 2026 GMC Sierra 1500 with the Duramax® Turbo Diesel engine?

With the Duramax® 3.0L 6-Cylinder Turbo Diesel engine, the 2026 GMC Sierra 1500 offers an available maximum towing capacity of up to 13,300 pounds.

What are the estimated mileage ratings for the 2.7L TurboMax™ engine?

The 2.7L 4-Cylinder TurboMax™ engine achieves fuel efficiency ratings of up to 18 city / 21 highway mpg.

Which trims are available for the 2026 GMC Sierra 1500?

The 2026 GMC Sierra 1500 is available in eight unique trims, ranging from the baseline Pro to the off-road-ready AT4X and the mighty Denali Ultimate.