This 2020 GMC Sierra 3500HD AT4 represents a capable heavy-duty truck built for those who demand performance and reliability in their work and daily driving. With its Duramax 6.6L V8 Turbodiesel engine paired with a 10-speed automatic transmission and 4WD capability, this truck stands ready to handle demanding tasks while delivering the towing and hauling capacity serious truck owners require.

- Power Sunroof
- Gooseneck/5th Wheel Package with Bed View Camera
- HD Surround Vision with Trailer View Camera Provisions
- Multicolor 15 Diagonal Head-Up Display
- Driver Alert Package II with Automatic Emergency Braking and IntelliBeam Headlamps
- Technology Package including HD Rear Vision Camera and Rear Camera Mirror
- 20 Machined Aluminum Wheels with High Gloss Black Paint
- 6 Black Rectangular Assist Steps
- Heated and Ventilated Front Seats
- Spray-On Pickup Bed Liner with AT4 Logo
- Premium GMC Infotainment System with Navigation
- Remote Vehicle Starter System
- Integrated Trailer Brake Controller with Hitch Guidance
- ProGrade Trailering System
- All-Weather Floor Liners with AT4 Logo

The Sierra 3500HD AT4 comes equipped with comprehensive trailering technology designed to simplify operation and enhance safety. The integrated trailer brake controller, hitch guidance with hitch view, and in-vehicle trailering system app provide the tools needed for confident hauling. Multiple camera views offer superior visibility around the vehicle, while the surround vision system helps you maintain awareness in any situation. The bed view camera and rear camera mirror add practical utility for parking and maneuvering in tight spaces.

Technology features throughout the cabin keep you connected and informed. The 8 digital driver information center displays critical vehicle data, while the 15 head-up display projects essential information onto your windshield for quick reference without taking your eyes off the road. The premium infotainment system with navigation, combined with wireless charging and multiple USB ports, ensures your devices stay powered and accessible. Apple CarPlay and Android Auto integration keeps your smartphone seamlessly connected.

Safety systems on this AT4 include forward collision alert, lane departure warning, automatic emergency braking, and rear cross traffic alert—technologies designed to help prevent accidents before they happen. The safety alert seat provides tactile warnings to complement visual and auditory alerts. Speed-sensing steering, electronic stability control, and traction control work together to maintain vehicle control in challenging driving conditions. The 220-amp alternator ensures reliable electrical system performance, while the engine block heater aids cold-weather starting.

Comfort and convenience features demonstrate GMC's attention to owner experience. Heated and ventilated front seats adapt to seasonal conditions, while the heated steering wheel adds warmth during winter months. The automatic temperature control system maintains your preferred cabin environment, and the power sliding rear window with defogger enhances functionality. Remote keyless entry, memory seat settings, and the remote vehicle starter system reflect thoughtful engineering for daily convenience.

With 46,513 miles on the odometer, this Sierra 3500HD AT4 represents a well-maintained example of GMC's heavy-duty lineup. The truck's condition, combined with its powerful diesel engine and comprehensive feature set, offers genuine value for buyers seeking a capable work truck with modern amenities. We invite you to experience this truck firsthand and discuss how it meets your specific needs.

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