2025 GMC Sierra 3500HD SLE

The 2025 GMC Sierra 3500HD SLE is engineered for serious work with a refined edge. Built to handle extreme loads while keeping drivers comfortable and confident, this heavy-duty pickup blends GMC’s professional-grade toughness with modern technology and everyday usability, ready for demanding jobs and long hauls alike. 

Performance & Heavy-Duty Capability 

• Engine: Duramax® 6.6L V8 Turbo Diesel delivering immense torque for confident towing and hauling 

• Transmission: Allison® 10-Speed Automatic providing smooth, controlled shifts under heavy load 

• Drivetrain: Two-speed electronic 4-Wheel Drive for traction across work sites and changing conditions 

• Rear Axle Ratio: 3.42 for an ideal balance of pulling power and highway stability 

• GVWR: Up to 12,100 lbs, engineered for demanding payloads 

• Trailering Equipment: Integrated trailer brake controller, hitch guidance, gooseneck/5th-wheel prep, and advanced trailering capability 

• Control Systems: Automatic locking rear differential and diesel exhaust brake for confident control on steep grades 

Work-Ready Strength & Durability 

• Heavy-duty suspension tuned for stability while towing or hauling 

• High-capacity air filtration, engine oil cooler, and transmission oil cooler for sustained performance 

• All-terrain tires mounted on 18" machined aluminum wheels with dark metallic accents 

• Spray-on bedliner and Durabed pickup box built for real-world abuse 

Interior Comfort & Convenience 

• Front 40/20/40 bench seating with a 10-way power driver seat 

• Heated front seats and heated steering wheel for cold-weather comfort 

• Dual-zone automatic climate control with rear air vents 

• Remote start, push-button start, and cruise control for everyday ease 

• Power windows, keyless open, and deep-tint glass for added comfort and privacy 

Technology & Connectivity 

• 13.4" GMC Premium Infotainment touchscreen with Google Built-In 

• Wireless Apple CarPlay® & Android Auto™ compatibility 

• 12" configurable digital driver information display 

• Wireless charging pad, multiple USB ports, and 120V power outlets in the cab and bed 

• HD rear vision camera and trailer-friendly visibility features 

Safety & Driver Assistance 

• GMC HD Pro Safety suite with forward collision alert and automatic emergency braking 

• Lane departure warning, following distance indicator, and front pedestrian braking 

• Buckle-to-Drive and Teen Driver features for added awareness 

• Rear seat reminder and tire pressure monitoring system 

Exterior Styling & Utility 

• Exterior Colour: Summit White - clean, bold, and work-ready 

• Chrome front and rear bumpers with integrated corner steps 

• LED headlamps, fog lamps, roof marker lamps, and IntelliBeam® automatic high beams 

• EZ-Lift tailgate with power lock and release for easier loading 

• Chrome assist steps and black front recovery hooks for added confidence and accessibility 

The Bottom Line 

Whether you’re hauling heavy equipment, towing a large trailer, or putting in long days on the job, the 2025 GMC Sierra 3500HD SLE delivers uncompromising diesel power, smart technology, and proven GMC durability, a heavy-duty truck built to work hard and finish strong. 

The 2025 GMC Sierra 3500HD SLE is engineered for serious work with a refined edge. Built to handle extreme loads while keeping drivers comfortable and confident, this heavy-duty pickup blends GMC’s professional-grade toughness with modern technology and everyday