Shopping for a capable and luxurious truck to get the job done? Consider getting the 2026 GMC Sierra 3500 HD. This work-ready truck is capable of towing up to 36,000 pounds through the Max Trailering package. It has two engines to choose from, including a turbo diesel option. These are only a few of the many highlights that make the 2026 GMC Sierra 3500 HD a great choice for work, so continue reading to get even more details about its luxurious interior, advanced technology, and so much more.
Explore other GMC trucks at Yellowknife Motors, including the Sierra 1500, Canyon, and the Sierra 2500 HD.
Performance
Engine Options
Incredible performance is to be expected from the 2026 GMC Sierra 3500 HD. Pick from two powerful engine options to configure the truck to suit your needs. The standard engine is the 6.6-litre V8 gas that cranks out 401 horsepower and 464 lb-ft of torque. However, the available 6.6-litre Duramax Turbo-Diesel V8 engine is the recommended choice for maximum output as it delivers 470 horsepower and 975 lb-ft of torque.
Towing Capacity
When the best is what you’re after, the 2026 GMC Sierra 3500 HD is the right choice thanks to its great towing power. You can upfit your GMC truck for fifth-wheel or goose-neck towing to deliver a maximum towing capacity of 36,000 pounds.
2026 GMC Sierra 3500 HD Engine Specifications
| Engine Type | 6.6L V8 Gas | 6.6L Duramax Turbo-Diesel V8 |
| Horsepower | 401 | 470 |
| Torque (lb-ft) | 464 | 975 |
| Maximum Towing Capacity (lb/kg) | 18,400 / 8,347 | 36,000 / 16,330 |
| Transmission | Allison® 10-Speed Automatic | Allison® 10-Speed Automatic |
Exterior
Bold & Modern
Unlike any other truck on the road, the 2026 GMC Sierra 3500 HD has a commanding presence that is reflective of its unique design. From its modern LED projector headlamps with animated sequences to the bold grille and other aggressive styling features, the new Sierra 3500 HD looks as good as it performs.
Exterior Paint Colours
Customize your 2026 GMC Sierra 3500 HD to suit your unique preferences or match your business by picking from one of the following exterior colour options: (Extra Charge Colour*)
- Onyx Black
- Summit White
- Cardinal Red
- Sterling Metallic
- Downpour Metallic*
- Coastal Dune*
Interior
Driver Comforts
A work truck should be comfortable, and that’s exactly what the 2026 GMC Sierra 3500 HD is. The available heated steering wheel and heated driver and front passenger seats are ideal for staying warm. The available 16-way power front seats with massaging feature are the perfect amenity after a long work day. A 40/20/40 split-bench front seat with under-seat storage comes standard, providing an ideal place to secure valuables.
Premium Luxury
Those seeking more comfort and luxury from the 2026 GMC Sierra 3500 HD without compromising durability will want to explore the Alpine Umber interior available in the Denali Ultimate. Some of its luxurious features include:
- Full Grain Leather Seating
- Plaited Contrast Stitching
- Embossed and Laser-Etched Topographical Map Patterns
Technology
Driver Information Centre
Access vital vehicle information such as safety warnings, driving metrics, and more at a glance with the 12.3-inch driver information centre display that’s available for the 2026 GMC Sierra 3500 HD. It comes standard a trim level up from the base trim, replacing the traditional analog gauges with a high-definition cluster display layout.
Large Infotainment Screen
Enjoy seamless access to entertainment media and helpful features while on the go within the available 13.4-inch touchscreen display. This display is compatible with wireless Apple CarPlay and Android Auto, providing even greater flexibility for pairing your smartphone with your GMC. Like the Driver Information Centre, this screen is a standard option for the SLE trim level and up.
Safety & Driver Assistance
Advanced Driver Assistance
The 2026 GMC Sierra 3500 HD has a wide selection of advanced driver assistance features that come standard. These include:
- Lane Departure Warning
- Front Pedestrian Braking
- Forward Collision Alert
- Automatic Emergency Braking
- Following Distance Indicator
- IntelliBeam
Auxiliary Trailer Camera
The 2026 GMC Sierra 3500 HD is not only capable of heavy-duty towing, but it can also be fitted with helpful towing features such as the Auxiliary Trailer Camera. This camera provides a clear view of the trailer for safer towing, and you can even take advantage of helpful view options such as Transparent Trailer View, Rear Trailer View or Inside Trailer View, depending on camera installation.
2026 GMC Sierra 3500 HD Trim Levels
PRO 2WD
Starting at $75,333- Trailering Package
- 6-Speaker Audio System
- 40/20/40 Split-Bench Front Seat with Under-Seat Storage
SLT 4WD
Starting at $94,133- Heated Steering Wheel
- Remote Start
- Signature LED Daytime Running Lamps
AT4 4WD
Starting at $102,833- GMC MultiPro Tailgate
- Trailer Side Blind Zone Alert
- 13.4-inch Diagonal GMC Premium Infotainment System with Google Built-In
Denali Ultimate 4WD
Starting at $131,933- Multipro Audio System by Kicker
- 6.6L Duramax Turbo-Diesel V8 Engine
- Power-Retractable Assist Steps with LED Perimeter Lighting
Shop the 2026 GMC Sierra 3500 HD at Yellowknife Motors
Are you ready to drive home a 2026 GMC Sierra 3500 HD, the perfect job site truck? Contact us at your earliest convenience and speak to our friendly staff at Yellowknife Motors. We’re ready to help find the perfect GMC truck for your driving needs. You are welcome to visit our showroom anytime and book your test drive to get an even better idea of what the GMC truck lineup has to offer for your commute.