2026 GMC Sierra 1500 Engine Specs & More

From the professional job sites in Milford to the boat ramps along the Delaware coast, the 2026 GMC Sierra 1500 is engineered to dominate. Whether you need the refined luxury of the Denali Ultimate or the raw off-road grit of the AT4X, the Sierra 1500 offers a level of versatility that other pickups simply can’t match. Below, the experts at Kent County Motors break down the performance specs, engine options, and towing capabilities of the 2026 lineup to help you find the perfect new GMC Sierra 1500 for sale in Dover.

2026 GMC Sierra 1500 Engine Specs: Power & Torque

The 2026 GMC Sierra 1500 lineup is defined by its four world-class engine options. Each powertrain is designed for a specific type of Delaware driver—from fuel-conscious commuters to heavy-duty haulers on the Delmarva Peninsula.

A Closer Look at the Duramax® Diesel

For those prioritizing efficiency and maximum pulling power, the 3.0L Duramax® Turbo-Diesel is the undisputed king. Delivering a staggering 495 lb-ft of torque, it’s the ideal choice for towing heavy trailers past Smyrna. When paired with the 10-speed automatic transmission, it offers the smoothest power delivery in the half-ton segment.

How Fuel-Efficient is the 2026 GMC Sierra 1500?

In 2026, performance isn’t just about power—it’s about how far you can go on a single tank. The GMC Sierra 1500 MPG ratings are highly competitive, especially when choosing the diesel or TurboMax options for your commute through Middletown.

• 3.0L Duramax® Diesel: Up to 23 City / 29 Highway MPG
• TurboMax™ 2.7L: Up to 18 City / 22 Highway MPG
• 5.3L EcoTec3 V8: Up to 16 City / 21 Highway MPG
• 6.2L EcoTec3 V8: Up to 15 City / 19 Highway MPG

*MPG ratings vary based on 2WD vs. 4WD configurations.

Why Buy Your GMC Sierra 1500 at Kent County Motors?

Choosing your truck is the first step; choosing your dealership is the second. At Kent County Motors, we don’t just sell trucks—we support your ownership journey. From our seamless online financing to our certified GMC service center on South Bay Road, we provide the local authority and specialized care you won’t find at big-box retailers.

Ready to experience the 2026 GMC Sierra 1500 performance for yourself? Contact us today to schedule a test drive. Before you arrive, be sure to use our online trade-in tool to see how much your current vehicle is worth. We look forward to helping you find the strongest truck in Dover!