New 2026 GMC Sierra 3500HD SLT

The 2026 GMC Sierra 3500HD SLT combines heavy-duty capability, advanced towing technology, and premium comfort into one exceptionally capable truck. Designed to tackle demanding jobs while keeping passengers comfortable and connected, this Sierra HD delivers impressive strength, confidence, and refinement wherever the road—or worksite—takes you. 

Performance & Capability 

• Engine: Duramax® 6.6L V8 Turbo-Diesel delivering outstanding torque, towing confidence, and long-haul durability 

• Transmission: Allison® 10-Speed Automatic Transmission engineered for smooth, efficient power delivery 

• Drivetrain: 4-Wheel Drive (4WD) system for enhanced traction and control in all weather and terrain conditions 

• Rear Axle Ratio: 3.42 axle ratio optimized for towing performance and highway efficiency 

• Automatic Locking Rear Differential for improved traction when conditions become challenging 

• Digital Variable Steering Assist enhances handling precision and driver confidence 

• Heavy-Duty Cooling Systems including engine oil cooler, transmission oil cooler, and engine exhaust brake 

• Integrated Trailer Brake Controller and Advanced Trailering Package for confident towing capability 

• Gooseneck/5th Wheel Prep Package ready for serious hauling requirements 

• Hitch Guidance, Hitch View, Trailer Camera Provisions, and In-Vehicle Trailering App simplify hookup and towing operations 

• Standard Heavy-Duty Suspension Package built to handle demanding workloads with stability and control 

Winter & Weather Comfort 

• Heated & Ventilated Front Seats provide year-round comfort regardless of the season 

• Heated Rear Outboard Seats keep second-row passengers comfortable during colder months 

• Heated Steering Wheel adds warmth on frosty mornings 

• Remote Start System allows the cabin to be pre-conditioned before departure 

• Dual-Zone Automatic Climate Control maintains personalized comfort for driver and passenger 

• Engine Block Heater supports dependable cold-weather starts 

• Rain-Sensing Windshield Wipers automatically adjust to changing weather conditions 

• Winter Grille Cover helps maintain optimal operating temperatures during extreme cold 

Interior Comfort & Convenience 

• Premium Front Bucket Seats with power adjustment and lumbar support for exceptional long-distance comfort 

• Driver Memory Settings conveniently recall preferred seating and mirror positions 

• Power Sliding Rear Window enhances cabin ventilation and convenience 

• Wireless Charging Pad keeps devices powered without clutter 

• Multiple USB Ports throughout the cabin for convenient device connectivity 

• 120-Volt Interior Power Outlet and Bed-Mounted Power Outlet provide versatile charging capability 

• Keyless Open and Push-Button Start simplify everyday operation 

• Power Sunroof brings additional light and openness to the cabin 

• Rear Seat Storage Package adds practical cargo flexibility 

• Bose® Premium Audio System delivers rich, immersive sound quality 

• 13.4" GMC Premium Infotainment Touchscreen with Google Built-In, Navigation Capability, Wireless Apple CarPlay®, and Wireless Android Auto™ 

• 12" Digital Driver Information Centre provides customizable vehicle and towing information 

Safety & Driver Assistance 

• GMC Pro Safety and Pro Safety Plus technologies enhance driver awareness and confidence 

• Forward Collision Alert with Automatic Emergency Braking 

• Front Pedestrian Braking for added urban driving protection 

• Lane Departure Warning helps keep the vehicle centered and alert 

• Adaptive Cruise Control enhances highway comfort and convenience 

• HD Surround Vision provides a comprehensive view around the truck 

• Bed View Camera improves visibility when loading cargo or connecting trailers 

• Trailer Side Blind Zone Alert assists while towing 

• Rear Cross Traffic Alert helps detect approaching vehicles when reversing 

• Front and Rear Park Assist simplify maneuvering in tight spaces 

• Following Distance Indicator and Safety Alert Seat provide additional driver awareness 

• Teen Driver technology encourages safe driving habits 

Exterior Styling & Utility 

• Exterior Colour: Summit White — clean, timeless, and professional in appearance 

• 20" Bright-Face Aluminum Wheels with Dark Painted Pockets create a bold and upscale stance 

• Chrome Front and Rear Bumpers, Chrome Mirror Caps, Chrome Door Handles, and Chrome Assist Steps elevate the truck’s premium appearance 

• LED Headlamps, LED Fog Lamps, LED Cargo Bed Lighting, and LED Roof Marker Lamps maximize visibility day and night 

• Heated Power Trailering Mirrors with Auto-Dimming functionality improve towing visibility 

• Spray-On Bedliner helps protect the cargo box from wear and tear 

• EZ Lift Power Lock and Release Tailgate adds everyday convenience 

• CornerStep Rear Bumper allows easy access to the bed 

• All-Terrain Tires provide confident traction on a variety of surfaces 

• Front Recovery Hooks add utility when conditions demand extra capability 

Whether you're towing heavy equipment, hauling a large trailer, or tackling demanding projects year-round, the 2026 GMC Sierra 3500HD SLT delivers the strength, technology, and premium comfort needed to get the job done. Built to handle hard work without compromising refinement, it's a heavy-duty truck engineered for drivers who expect capability and sophistication in equal measure.