New 2026 GMC Sierra 3500HD

There is a certain appeal to a heavy-duty truck that is clearly built for serious work but still gives you a comfortable place to spend the day. This 2026 GMC Sierra 3500HD SLT Crew Cab 4WD fits that balance well, with the 6.6L Duramax V8 turbo diesel providing the kind of powertrain many HD buyers specifically look for. The X31 Off-Road Package adds extra hardware underneath, while the SLT cabin brings heated seating, driver memory, dual-zone climate control, and a large digital display setup. Finished in Summit White with a Jet Black interior, it has a clean, professional look that works just as well on the jobsite as it does around Prince George, BC.

Performance and Mechanical

The Duramax diesel and 10-speed automatic give this Sierra the serious foundation expected from a 3500HD. X31 equipment adds off-road suspension, Rancho shocks, skid plates, and Hill Descent Control for rougher terrain.

• 6.6L Duramax V8 turbo diesel
• 10-speed automatic transmission
• 4-wheel drive
• X31 Off-Road Package
• Off-road suspension
• Twin-tube Rancho shocks
• Hill Descent Control
• Skid plates
• Autotrac 2-speed transfer case
• Automatic locking rear diff
• Digital Variable Steering
• Trailer brake controller
• Trailering Package
• Trailer sway control
• Hill Start Assist
• 3.42 rear axle ratio
• High idle switch
• Heavy-duty front springs

Connectivity and Technology

The 13.4-inch centre touchscreen and 12.3-inch driver display give the cabin a modern, easy-to-read layout. Hitch View and the in-vehicle trailering app are especially useful when towing is part of the day.

• 13.4-inch colour touchscreen
• Google built-in
• Navigation capability
• Wireless Apple CarPlay
• Wireless Android Auto
• Bluetooth
• 12.3-inch driver info centre
• Hitch Guidance with Hitch View
• In-vehicle trailering app
• Remote start
• 120V instrument panel outlet
• 120V cargo bed outlet

Interior

The SLT cabin brings a more refined feel to heavy-duty truck ownership. Heated front seats, driver memory, dual-zone climate control, and a power driver seat make long hours behind the wheel easier to live with.

• Jet Black interior
• Heated front seats
• Heated steering wheel
• 10-way power driver seat
• Driver seat and mirror memory
• Dual-zone automatic climate
• Auto-dimming rearview mirror
• Rear window defogger
• All-weather floor liners

Exterior

Summit White keeps the Sierra looking clean and professional, while the LED lighting and power-folding trailering mirrors add a more polished finish. Around the box, cargo lighting, BedStep access, and the EZ-Lift tailgate make loading and unloading easier.

• Summit White
• LED projector headlamps
• LED fog lamps
• LED cargo bed lighting
• Power-folding trailering mirrors
• Heated trailering mirrors
• Perimeter mirror lighting
• EZ-Lift power-release tailgate
• Integrated BedStep
• Rear wheelhouse liners
• Rain-sensing wipers
• 18-inch aluminum wheels
• All-terrain tires
• 6.8-foot box

Safety and Security

Sierra HD Pro Safety adds important driver-assistance features for everyday driving, while the rear camera helps with visibility around a truck this size.

• Automatic Emergency Braking
• Forward Collision Alert
• Front Pedestrian Braking
• Lane Departure Warning
• Following Distance Indicator
• HD Rear Vision Camera
• IntelliBeam auto high beams
• Rear Seat ReminderThis Sierra 3500HD SLT is built for someone who needs real heavy-duty capability but does not want the cabin to feel stripped down. The Duramax diesel, trailering equipment, X31 hardware, and Crew Cab make it ready for demanding work, while the heated seating, digital displays, and driver memory make the experience noticeably more comfortable. It is a serious truck with enough polish to make the long days easier, and Wood Wheaton has it ready for its next owner.