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2020 GMC Sierra 3500 HD Crew Cab
AT4 Pickup 4D 6 1/2 ft
109,576 miles
Includes:$16,320 in factory upgrades
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Why You’ll Love This Sierra 3500

Slotted between the SLT and Denali trims in the GMC Sierra 3500 HD lineup, the AT4 elevates everyday capability with heated and ventilated leather-appointed front seats for long-haul comfort, a multicolor 15" diagonal head-up display, and power-folding and extending trailering mirrors with an integrated trailer brake controller for confident towing.

AT4 Premium Package

Originally valued at $3,465, this package adds Ultrasonic Front and Rear Park Assist, Rear Cross Traffic Alert, Lane Change Alert with Side Blind Zone Alert, a Bose Premium 7 Speaker Sound System, and 20-inch 6-spoke bright machined aluminum wheels.

Technology Package

Originally valued at $2,125, this package provides an 8-inch Driver Information Center, HD Surround Vision with 2 Trailer View Camera Provisions, a multicolor 15-inch diagonal Head-Up Display, and a Bed View Camera.

Driver Alert Package II

Originally valued at $645, this package adds Forward Collision Alert, Following Distance Indicator, Automatic Emergency Braking, a Safety Alert Seat, and Lane Departure Warning to assist with safe driving.

Gooseneck/5th Wheel Package

Originally valued at $545, this package includes the Gooseneck/5th Wheel Prep Package, providing the necessary foundation for heavy-duty towing applications.

Duramax 6.6L Turbo-Diesel V8 Engine

Originally valued at $9,890, this Duramax 6.6L Turbo-Diesel V8 engine delivers substantial power and torque for demanding tasks.

Heavy-duty hauler

Unleashes 445 HP and 910 lb-ft through its 6.6L Duramax Turbo Diesel V8 engine, Allison 10-speed automatic transmission and 4WD, providing 21,040 lbs towing capacity with a dual path air induction system and intelligent diesel exhaust brake.

World's first six-function GMC MultiPro Tailgate

Provides versatile cargo management with six distinct functions, making loading, unloading and accessing the bed easier.

Up to 15 camera views

Enhances situational awareness with multiple camera angles, including Surround View and Transparent Trailer View, for easier maneuvering and trailering.

Heated and ventilated leather-appointed front seats

Offers personalized comfort with 10-way power adjustments, heating and ventilation for year-round driving.

Multicolor 15" diagonal head-up display

Projects key vehicle information, including an off-road inclinometer, directly onto the windshield for improved focus on the road or trail.

Adventure-ready engineering

The AT4 trim prioritizes premium off-road capability, blending rugged hardware with advanced technology for adventure-focused buyers.

Front leather-appointed seating

Features Jet Black with Kalahari accents, providing a premium and distinctive interior aesthetic.

Power-folding and extending trailering mirrors

Provides enhanced visibility for towing with auto-dimming upper glass, perimeter lighting and puddle lamps for convenience.

Leather-wrapped heated steering wheel

Warms hands in colder weather and provides a comfortable grip for long drives.

Apple CarPlay compatibility

Integrates your iPhone for navigation, music and communication.

Android Auto compatibility

Connects your Android phone for seamless access to apps, maps and media.

Off-road suspension with Rancho shocks

Provides enhanced damping and articulation for improved comfort and control over challenging terrain.

Eaton automatic locking rear differential

Automatically locks the rear wheels for maximum traction in low-grip off-road situations.

Traction Select System

Optimizes vehicle performance for various conditions with dedicated Off-Road and Tow/Haul modes.

2-speed AutoTrac transfer case

Automatically shifts between 2WD and 4WD as needed, providing confident traction without driver intervention.

Integrated trailer brake controller

Provides seamless and responsive control of trailer brakes for safer towing.

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