Used 2022 GMC Sierra 3500HD AT4

The 2022 GMC Sierra 3500HD AT4 is a premium heavy-duty truck built for serious towing, off-road confidence, and everyday comfort. Powered by the legendary 6.6L Duramax® Turbo Diesel and paired with the Allison® 10-speed automatic transmission, this Sierra delivers exceptional torque, hauling strength, and durability. As part of GMC’s AT4 lineup, it features off-road enhancements, rugged styling, and premium interior comfort. With its advanced trailering tech, heated seats and steering wheel, and four-wheel drive capability, the Sierra 3500HD AT4 is designed to tackle tough Canadian conditions with confidence and class. 

Performance & Capability 

• Engine: 6.6L Duramax® Turbo Diesel V8 for high-output towing and long-haul dependability 

• Transmission: Allison® 10-speed automatic for optimized torque and smooth shifts 

• Drivetrain: 4WD with Autotrac two-speed transfer case and automatic locking rear differential 

• Suspension: Z71 Off-Road Suspension Package with skid plates for added protection 

• Towing & Trailering: 

• Advanced trailering system with hitch guidance and hitch view 

• Gooseneck/5th wheel prep package with stamped bed holes 

• Integrated trailer brake controller and exhaust brake 

• Durability Enhancements: 

• Engine oil and transmission coolers 

• Heavy-duty air filter and high-capacity alternator 

• Bed-mounted 120V power outlet and LED cargo lighting 

• Winter Readiness: 

• Engine block heater 

• Heated front and rear outboard seats 

• Heated steering wheel and strong HVAC/defrost system 

• Remote vehicle start and winter grille cover 

Interior Comfort & Design 

• Seating: 

• Heated and ventilated front bucket seats with 10-way power driver adjustment 

• Heated rear outboard seats and rear seat storage package 

• Cabin Features: 

• Tri-zone automatic climate control with rear air vents 

• Leather-wrapped steering wheel with tilt/telescoping adjustment 

• Premium floor liners with removable carpet inserts 

• Power sliding rear window and sunroof for added versatility 

• Convenience: 

• Keyless entry and push-button start 

• Memory settings for driver’s seat and mirrors 

• Wireless charging pad 

• Ample in-cab storage with centre console and rear seat compartments 

Technology & Connectivity 

• Infotainment: 8" Premium GMC Infotainment System with Navigation 

• Smartphone Integration: Apple CarPlay® and Android Auto™ compatible (wired and wireless) 

• Audio & Charging: Premium Bose® sound system with multiple USB ports, SD card reader, and 120V outlets 

• Connectivity: 

• 4G LTE Wi-Fi® hotspot capable 

• Bluetooth® for hands-free communication and audio streaming 

• Driver Info: 4.2" Driver Information Centre with trailer profiles and digital gauges 

Safety & Driver Assistance 

• Airbag Coverage: Full suite of airbags including dual front, side-impact, and curtain airbags 

• Braking & Stability: 

• 4-wheel anti-lock disc brakes 

• Hill Descent Control and Trailer Sway Control 

• Electronic stability and traction management 

• Driver Assistance Features: 

• Lane Change Alert with Side Blind Zone Alert 

• Rear Cross Traffic Alert 

• HD Surround Vision with Bed View Camera 

• Teen Driver Mode and Rear Seat Reminder 

• Front and Rear Park Assist 

• Trailering Safety: Advanced Trailering System with checklists and light testing 

Exterior Styling & Utility 

• Design: AT4 styling with unique dark chrome accents, red recovery hooks, and body-color bumpers 

• Lighting & Mirrors: 

• LED headlamps, fog lamps, and roof marker lights 

• Power-adjustable, heated trailering mirrors with auto-dimming and integrated lighting 

• Bed Utility: 

• GMC MultiPro Tailgate with multiple loading modes 

• Spray-on bedliner and LED cargo box lighting 

• Gooseneck/5th wheel ready with 7-pin trailer harness 

• Wheels & Tires: 20" aluminum wheels with off-road all-terrain tires 

• Side Access: High-clearance off-road assist steps for easier entry and exit 

With its diesel powertrain, luxurious yet rugged design, and full suite of towing, off-road, and winter-ready features, the 2022 GMC Sierra 3500HD AT4 delivers elite performance for drivers who demand both strength and sophistication in a heavy-duty truck.