Your Complete Guide to What’s New in the 2027 GMC Sierra 1500

The 2027 GMC Sierra 1500 launches a brand-new generation, bringing extensive updates to its exterior design, powertrain architecture, cabin technology and off-road capability.

Two new sixth-generation Small Block V8 engines headline the powertrain changes, the TurboMax engine gains additional output, a 10-speed automatic transmission becomes standard across all engines, and upper trims like the Denali Ultimate and AT4X introduce advanced features.

Here is what stands out in the 2027 GMC Sierra 1500.

Redesigned and Imposing Exterior

The 2027 Sierra features a more upright stance. The front fascia incorporates a taller grille alongside an evolved GMC LED lighting signature. At the rear, new LED taillamps refresh the look, while available welcome and farewell lighting animations add visual appeal.

GMC has expanded visual distinction across individual models :

• Off-Road Trims (AT4 and AT4X) : Feature protective skid plates, red recovery hooks, and rugged body detailing ;
• Luxury Trims (Denali and Denali Ultimate) : Highlight chrome and forged-wood accents with a refined finish ;
• Exhaust : Quad exhaust outlets are available on selected configurations.

Two New Sixth-Generation Small Block V8 Engines

The major mechanical update for 2027 is the introduction of GM's sixth-generation Small Block V8 engine family in 5.7L and 6.6L displacements.

The full engine lineup includes four options :

• 2.7L TurboMax : 350 hp and 455 lb-ft of torque ;
• 3.0L Duramax Turbo-Diesel : 305 hp and 495 lb-ft of torque ;
• 5.7L V8 Small Block : 402 hp and 428 lb-ft of torque ;
• 6.6L V8 Small Block : 481 hp and 501 lb-ft of torque.

The new 5.7L V8 replaces the previous 5.3L and delivers a strong balance of horsepower and towing strength. The 6.6L V8 produces 481 horsepower, making it the most powerful naturally aspirated V8 in its segment. It comes standard on the Denali Ultimate.

Both V8 engines feature direct and port fuel injection, revised airflow, and optimized cooling for sustained performance under heavy loads.

Standard 10-Speed Automatic Across All Engines

Every 2027 GMC Sierra 1500 engine is now paired with a 10-speed automatic transmission.

This change is especially important for the 2.7L TurboMax engine, which previously used an 8-speed automatic. The 10-speed gearbox keeps the engine in its optimal powerband when towing, accelerating, or hauling heavy payloads. Buyers no longer need to choose an engine based on transmission availability.

Completely Redesigned Interior with MultiPro Console

Inside, the Sierra 2027 receives a redesigned cabin featuring elevated materials, available real wood trim, and forged-wood detailing on Denali Ultimate. An available panoramic sunroof brings natural light into the cabin.

The new available MultiPro centre console opens into an extended flat work surface, providing a practical workspace for laptops or documents when parked. It also includes deep storage compartments and accessible USB charging ports.

Over 60 Inches of Display Area in Denali Ultimate

The 2027 Sierra Denali Ultimate offers over 60 inches of combined digital display area :

• 16.3-inch centre infotainment touchscreen with concealed storage ;
• 11.5-inch front passenger display with an articulating cover ;
• 12.2-inch digital Driver Information Centre ;
• 15-inch multicolour Head-Up Display ;
• 8.5-inch Rear Camera Mirror.

A 16-speaker Bose Premium Series audio system with headrest-mounted speakers delivers immersive sound.

Super Cruise with Trailering Capability

Denali Ultimate includes a 3-year subscription to Super Cruise hands-free driver assistance technology, compatible with over 965,000 kilometres of supported highways in Canada and the U.S.

Super Cruise supports hands-free driving while towing a trailer under compatible conditions. It also includes Automatic Lane Change and Turn Signal Initiated Lane Change functionality.

AT4X Off-Road Hardware Upgrades

The off-road-focused Sierra AT4X receives significant upgrades for 2027 :

• Standard 35-inch Goodyear Wrangler Territory MT tires ;
• 2-inch factory suspension lift ;
• Multimatic DSSV dampers paired with Jounce Control Dampers ;
• Front and rear electronic locking differentials ;
• Dedicated off-road hood and revised front fascia.

The front and rear e-lockers ensure maximum traction when crossing uneven terrain. The interior features Timber Mahogany accents, a flat-bottom steering wheel, and a standard panoramic sunroof. The AEV Edition remains available for extreme off-road enthusiasts.

2027 GMC Sierra 1500 Trim Overview

The first 2027 GMC Sierra 1500 models are scheduled to arrive at Canadian dealerships before the end of 2026.