2026 GMC Sierra 1500: Six-Function MultiPro Tailgate and ProGrade Trailering System

The 2026 GMC Sierra 1500 addresses real truck work with two standout features: the six-function MultiPro Tailgate and the integrated ProGrade trailering system. From job sites to campgrounds, these tools adapt to how you use your truck daily—loading cargo, towing trailers, and managing heavy equipment with less effort and more precision.

For drivers in Montreal and across Quebec—and trucks in Quebec handle everything from winter equipment to weekend toys—these features solve common pain points. The MultiPro Tailgate transforms bed access, while the trailering technology removes guesswork from hitching and managing trailers. Here's how both systems work and why they matter.

The MultiPro Tailgate: Six Configurations for Real Truck Work

GMC's MultiPro Tailgate is the industry's first six-function tailgate. The system uses an inner gate that folds and reconfigures independently from the main tailgate, creating multiple load heights and access points.

Primary Load-Stop Position: Drop the main gate, then raise the inner gate to create a stop for long items like lumber or ladders. This prevents cargo from sliding out while you secure it, and you can still close the main gate partially for highway driving.

Standing Workstation: The inner gate folds down to create a flat surface at waist height—ideal for setting tools, organizing hardware, or working on a laptop at the job site. No more bending over the bed rail or balancing items on your bumper.

Step Function: Flip the inner gate down, and it becomes a sturdy step into the bed. This is particularly useful for loading or unloading cargo in tight parking lots with limited tailgate clearance.

The remaining three positions—full open, full closed, and load assist—round out the tailgate's flexibility. Load assist creates a gentler ramp angle for sliding heavy items into the bed, reducing strain and making solo loading more manageable.

Trailering Technology That Removes the Guesswork

The 2026 Sierra 1500's trailering system integrates hardware and software to simplify every aspect of towing. Maximum towing capacity reaches 5,987 kg (13,200 lbs) depending on configuration, but the advantage lies in how the truck helps you manage that capacity safely.

In-Vehicle Trailering App: The 13.4-inch diagonal touchscreen houses a dedicated trailering app that stores custom trailer profiles. Input your trailer's length, weight, and hitch type once, and the system recalls those details every time you hook up. The app also displays real-time trailer tire pressure (with compatible sensors) and brake status.

Up to 14 Camera Views: The Sierra 1500 offers up to 14 camera perspectives, including invisible trailer view, which digitally removes the trailer from your rearview to show the road behind you. Side-view cameras help you monitor trailer clearance in tight spaces, while the bed-mounted camera assists with fifth-wheel or gooseneck hitching.

myGMC Mobile App Integration: Create and manage trailer profiles from your smartphone, then share them with other Sierra owners. Borrowing a friend's boat trailer or switching between work and recreation trailers? Load the correct profile before you leave the house.

The available trailer brake controller integrates with the antilock brake system to provide measured brake force to electric-controlled trailer brake systems. This coordination helps prevent trailer sway and improves stopping confidence, especially on descending grades or in sudden traffic changes.

Key Trailering and Cargo Features at a Glance

How These Features Work Together in Real Scenarios

Consider a weekend trip to the Laurentians with a camping trailer. Before you leave Montreal, you open the myGMC app and load your trailer profile—the Sierra 1500 now knows your trailer's dimensions and weight. As you back up to hitch, the bed camera gives you a clear view of the coupler alignment. Once connected, the in-vehicle app confirms your trailer lights and brakes are functioning.

On the highway, the invisible trailer view lets you monitor traffic behind you without the trailer blocking your sight line. At the campsite, the MultiPro Tailgate's step function makes it easy to access gear stored in the bed without fully opening the tailgate in a tight parking spot. Unloading firewood? The load-stop position keeps logs from sliding out while you work.

The same features apply to work scenarios. Contractors hauling materials benefit from the tailgate's workstation mode for organizing tools and the load-assist position for sliding heavy equipment. The trailer brake controller and camera system provide added confidence towing skid steers or material trailers through construction zones.

Additional Capability Features Worth Noting

Beyond the tailgate and trailering system, the 2026 Sierra 1500 includes several features that support truck work:

• Available Max Trailering Package (SLE, Elevation, SLT): Includes 9.76-inch rear axle, enhanced cooling radiator, revised shock tuning, heavy-duty rear springs, and 220-amp alternator
• 12 Cargo Tie-Downs (standard on Pro trim): Secure loads quickly without aftermarket anchor points
• Available CarbonPro Composite Bed: Lightweight, dent-resistant bed material that won't rust or corrode
• Stabilitrak Stability Control: Detects and reduces traction loss to improve stability during towing or hauling

The available X31 Off-Road Package adds off-road suspension, hill descent control, underbody skid plates, and a heavy-duty air filter for drivers accessing remote job sites or recreational areas.

Engine Options and Performance

The Sierra 1500 offers three engine choices, each suited to different workloads:

TurboMax Engine (standard on Pro, SLE, Elevation): Delivers 310 horsepower and 430 lb-ft of torque with an 8-speed automatic transmission. This engine provides a maximum towing capacity of 4,309 kg (9,500 lbs) and comes with a 5-year/160,000-kilometre powertrain limited warranty.

5.3 L V8 Engine (available on Pro, SLE, Elevation, SLT; standard on Denali): Produces strong towing capability with a 10-speed automatic transmission. This engine balances power and fuel efficiency for mixed-use scenarios.

6.2 L V8 Engine (standard on Denali Ultimate, available on Denali and AT4X): Provides maximum power for heavy towing and high-performance applications. This engine pairs with the 10-speed automatic transmission and is ideal for drivers who regularly tow at or near maximum capacity.

Available Duramax 3.0 L Turbo-Diesel Engine: Offers strong torque delivery and improved fuel economy for long-haul towing. This engine is available on SLE, Elevation, SLT, Denali, and Denali Ultimate trims.

Technology That Supports Your Drive

The Sierra 1500 integrates technology to enhance both daily driving and truck-specific tasks:

Available Super Cruise: Hands-free driver assistance capability covers the largest network of compatible highways in North America. A 3-year trial period is included with equipped models. This feature reduces fatigue on long highway drives, particularly during towing.

Available 15-inch Diagonal Head-Up Display: Projects key information directly onto the windshield, helping you monitor speed, navigation, and vehicle status without looking down at the instrument cluster.

12.3-inch Diagonal Driver Information Centre: Reconfigure your display by choosing from Classic, Progressive, Digital, or Clean configurations to match your preferences.

The Premium GMC Infotainment System features a 13.4-inch diagonal colour touchscreen that provides access to navigation, entertainment, and vehicle settings. The interface is designed for use with work gloves, featuring large touch targets and clear menu structures.

Trim Levels and Configurations

The 2026 Sierra 1500 lineup spans from work-focused to luxury-oriented trims:

Pro: The foundational work truck with TurboMax engine, 12 cargo tie-downs, and essential capability features.

SLE: Adds 13.4-inch touchscreen, 12.3-inch driver information centre, 10-way power heated driver seat, and auto-locking rear differential.

Elevation: Features monochromatic exterior styling with gloss-black mesh grille inserts, LED fog lamps, and 20-inch gloss-black painted aluminium wheels.

SLT: Mid-range trim with available leather-appointed seating and enhanced comfort features.

AT4: Off-road focused with 2-inch suspension lift, off-road suspension, and available X31 Off-Road Package.

AT4X: Maximum off-road capability with front and rear electronic locking differentials, Multimatic DSSV dampers, and AEV stamped steel front bumper with winch capability.

Denali: Premium trim with 5.3 L V8 engine, signature chrome grille, authentic open-pore wood trim, and 12-way power front seats.

Denali Ultimate: Top-tier trim with 6.2 L V8 engine, Super Cruise, Bose 12-speaker premium audio, signature Vader Chrome grille, and 16-way power heated and ventilated front seats with massage feature.

Safety and Driver Assistance

GMC Pro Safety is standard across the Sierra 1500 lineup. This suite includes collision-avoidance and driver-assistance technologies designed to enhance awareness and help prevent accidents.

Front and Rear Park Assist helps you manoeuvre in tight spaces with audible alerts detecting objects near the bumpers. This feature is particularly useful parking with a trailer attached.

Available Hill Descent Control (standard on Denali and Denali Ultimate) provides smooth, controlled descents on steep grades by automatically managing brake pressure. This feature reduces wear on your brakes and improves control during downhill towing.

Selectable Traction Modes allow you to switch between Sport mode, available Off-Road mode, and Tow/Haul mode to match changing terrain and driving conditions. Tow/Haul mode adjusts transmission shift points and throttle response to optimize performance during hauling or towing.

Experience the 2026 Sierra 1500 at Le Relais Chevrolet

The 2026 GMC Sierra 1500's MultiPro Tailgate and trailering technology demonstrate how thoughtful engineering improves real-world truck use. From daily work tasks to weekend adventures across Quebec, these features reduce effort and increase confidence.

Visit Le Relais Chevrolet in Montreal to explore the Sierra 1500 lineup and see how the MultiPro Tailgate adapts to your specific needs. Our team can walk you through the trailering system and help you identify the right trim and configuration for how you use your truck.