The 2027 GMC Sierra 1500 begins a new generation with a redesigned body, a completely reworked interior, two new V8 engines and a greater emphasis on giving each model its own purpose.
The Sierra range stretches from the practical Pro to the off-road AT4X and the flagship Denali Ultimate. This guide covers the engines, technology, off-road features and premium equipment that define the 2027 GMC Sierra 1500.
What Engines Are Available in the 2027 GMC Sierra?
The Sierra offers four engines, all paired with a 10-speed automatic transmission:
| Engine | Power | Torque |
|---|---|---|
| 2.7L TurboMax | 350 hp | 455 lb-ft |
| 3.0L Duramax Turbo-Diesel | 305 hp | 495 lb-ft |
| 5.7L V8 | 402 hp | 428 lb-ft |
| 6.6L V8 | 481 hp | 501 lb-ft |
The 5.7L and 6.6L V8s belong to GM’s sixth generation of Small Block engines. The 6.6L is especially notable because it becomes the most powerful naturally aspirated V8 in its segment, serving as standard equipment in the Sierra Denali Ultimate.
How Much Can the Sierra Tow?
With the appropriate 5.7L V8 configuration, the Sierra can tow up to approximately 6,123 kg, or 13,500 lb.
Cab style, drivetrain, equipment, vehicle weight and installed options all influence the final rating, so buyers planning to tow regularly should configure the truck around the actual trailer rather than selecting an engine based only on its horsepower figure.
What Changes Inside the 2027 Sierra?
The cabin is completely redesigned across the lineup with new materials, available real wood, and forged-wood detailing on Denali Ultimate. A panoramic sunroof is also available.
One of the more practical additions is the new MultiPro centre console, which can open into an extended work surface while incorporating storage and access to available USB charging ports.
How Much Technology Does Denali Ultimate Offer?
Denali Ultimate provides more than 60 inches of available digital display area, including:
- A 16.3-inch centre infotainment display;
- An 11.5-inch front passenger display;
- A 12.2-inch Driver Information Centre;
- A 15-inch multicolour Head-Up Display;
- An 8.5-inch Rear Camera Mirror.
Denali Ultimate also includes a three-year subscription to Super Cruise driver assistance technology, supporting compatible hands-free driving on more than 965,000 km of approved roads across Canada and the United States, even while towing.
What Makes the Sierra AT4 and AT4X Different?
AT4 combines everyday Sierra usability with additional off-road equipment and styling, sitting between the more road-focused models and the significantly more specialized AT4X.
The AT4X receives major mechanical upgrades:
- 35-inch Goodyear Wrangler Territory MT tires;
- 2-inch suspension lift;
- Multimatic dampers and Multimatic Jounce Control Dampers;
- Front and rear electronic locking differentials;
- Unique hood, front fascia, and standard panoramic sunroof.
An available AEV Edition pushes the off-road concept even further.
Which Sierra Trims Are Offered?
| Trim | Main Focus |
|---|---|
| Pro | Work and utility |
| Elevation | Everyday use and style |
| AT4 | Off-road versatility |
| AT4X | Advanced off-road capability |
| Denali | Premium comfort |
| Denali Ultimate | Flagship luxury and technology |
The first 2027 Sierra 1500 models are expected to arrive before the end of 2026.
