The GMC Sierra 1500 is completely redesigned for 2027, introducing new V8 engines, significantly expanded digital technology and major upgrades to the AT4X and Denali Ultimate.
The Sierra lineup covers a wide range of requirements, from work-focused configurations to specialized off-road models and premium trucks. Understanding the differences in engines, towing capacity, equipment and technology is therefore important when selecting one.
Here are answers to common specification-focused questions about the 2027 GMC Sierra 1500.
1. What engines are available in the 2027 GMC Sierra 1500?
The Sierra offers four engine choices:
| 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 engines are completely new sixth-generation Small Block V8s. The TurboMax also receives additional power for 2027.
2. How much horsepower does the 2027 Sierra have?
Horsepower depends on the selected engine.
The TurboMax produces 350 hp, while the Duramax turbo-diesel develops 305 hp.
The new 5.7L V8 produces 402 hp, and the 6.6L V8 tops the lineup with 481 hp. The 6.6L is the most powerful naturally aspirated V8 available in its segment.
3. What is the maximum towing capacity of the 2027 GMC Sierra?
Maximum Sierra towing capacity reaches 13,500 lb, or approximately 6,123 kg, with the properly configured 5.7L V8.
| Engine | Maximum Towing |
|---|---|
| 2.7L TurboMax | 9,400 lb / 4,264 kg |
| 3.0L Duramax 3.0L | 12,100 lb / 5,488 kg |
| 5.7L V8 | 13,500 lb / 6,123 kg |
| 6.6L V8 | 9,400 lb / 4,264 kg |
Towing capability varies by vehicle configuration, trim and available packages.
4. What is the maximum payload capacity of the Sierra?
The TurboMax provides the highest published maximum payload figure at approximately 2,310 lb, or 1,048 kg.
Other maximum payload figures are:
- Duramax 3.0L: 1,850 lb / approximately 839 kg;
- 5.7L V8: 2,140 lb / approximately 971 kg;
- 6.6L V8: 1,450 lb / approximately 658 kg.
Payload varies according to the individual truck’s equipment, so the label on the specific vehicle remains the definitive reference.
5. Is the 6.6L V8 standard on the Sierra Denali Ultimate?
Yes. The 6.6L V8 is standard on the 2027 Sierra Denali Ultimate. It develops 481 hp and 501 lb-ft of torque.
The Denali Ultimate combines this engine with the Sierra’s most extensive selection of premium cabin technology and materials.
6. What trims are available on the 2027 GMC Sierra?
The Canadian lineup includes: Pro, Elevation, AT4, AT4X, Denali and Denali Ultimate.
Each serves a different purpose. Pro emphasizes utility, Elevation adds everyday style and equipment, AT4 and AT4X focus increasingly on off-road capability, and Denali and Denali Ultimate place greater emphasis on comfort and premium technology.
7. What size screens does the 2027 GMC Sierra have?
The Denali Ultimate demonstrates the full extent of the new Sierra digital interface.
Available displays include:
- 16.3-inch infotainment screen;
- 11.5-inch front passenger screen;
- 12.2-inch Driver Information Centre;
- 15-inch multicolour Head-Up Display;
- 8.5-inch Rear Camera Mirror.
Combined available display area exceeds 60 inches. The articulating centre screen also conceals storage behind it.
8. What is new about the Sierra AT4X?
The AT4X receives substantial off-road improvements for 2027.
Its equipment includes:
- 35-inch Goodyear Wrangler Territory MT tires;
- 2-inch factory suspension lift;
- Multimatic dampers;
- Multimatic Jounce Control Dampers;
- Front electronic locking differential;
- Rear electronic locking differential;
- Unique front fascia and hood.
The 35-inch tires are the largest factory-installed tires offered on a Sierra 1500.
9. Does the Sierra AT4X have front and rear locking differentials?
Yes. The 2027 AT4X features electronic locking differentials at both the front and rear.
This is particularly useful on uneven or low-traction terrain because both differentials can help distribute torque when individual wheels lose grip.
Combined with its 35-inch tires, lifted suspension and Multimatic hardware, the locking differentials form a major part of the AT4X’s off-road capability.
10. What is the MultiPro centre console?
The available MultiPro centre console is a new interior feature designed to improve cabin versatility.
It can open to create an extended work surface suitable for a laptop, tablet, paperwork or other items while the truck is parked.
It also integrates storage and access to available USB charging ports.
11. Does the 2027 GMC Sierra have Super Cruise?
Yes. Super Cruise is offered on the new Sierra, and Denali Ultimate includes a three-year subscription.
Compatible hands-free driving is supported on more than 965,000 km of compatible roads in Canada and the United States.
Super Cruise can also operate while trailering under supported conditions, making the system particularly relevant for owners who regularly tow over long highway distances.
12. What is the difference between Sierra Denali and Denali Ultimate?
Both emphasize premium comfort, but Denali Ultimate sits at the top of the Sierra lineup.
Denali Ultimate includes the 6.6L V8 as standard equipment and adds exclusive interior materials, expanded display technology and additional premium features.
It can include the 16.3-inch articulating centre display, 11.5-inch passenger display and a 16-speaker Bose Premium Series audio system with speakers integrated into the front head restraints.
13. When will the 2027 GMC Sierra arrive in Canada?
The first 2027 GMC Sierra 1500 models are expected to arrive at Canadian dealerships before the end of 2026.
The redesigned Sierra introduces a new generation of engines, cabin technology, off-road hardware and premium equipment while retaining four distinct powertrain choices.
