2020 GMC Sierra 2500HD AT4

The 2020 GMC Sierra 2500HD AT4 delivers rugged off-road capability combined with premium luxury and advanced technology. Powered by a 6.6L Duramax Turbo-Diesel V8, and equipped with the Technology Package and AT4 Premium Package, this heavy-duty truck is built to tackle the toughest terrains while providing a refined, feature-rich driving experience.

Performance & Capability:

• 6.6L Duramax Turbo-Diesel V8 with 445 horsepower and 910 lb-ft of torque

• 10-speed Allison automatic transmission for smooth, efficient towing and hauling

• Off-road tuned suspension and Rancho shock absorbers

• Skid plates and hill descent control for enhanced off-road performance

• Two-speed Autotrac transfer case with selectable 4WD modes

• Integrated trailer brake controller and trailering package for heavy towing needs

Technology Package Features:

• 15-inch Head-Up Display projecting key information onto the windshield

• Rear Camera Mirror for an unobstructed view behind the vehicle

• HD Surround Vision system for full 360° exterior visibility

• Bed View Camera to monitor cargo while driving

AT4 Premium Package Features:

• Premium leather-appointed front seats with AT4-specific accents

• Ventilated and heated front seats for year-round comfort

• Heated rear outboard seats

• Bose Premium Sound System for a superior listening experience

• Wireless charging pad for convenient device charging

• Power sunroof bringing more light and openness into the cabin

Interior Comfort & Convenience:

• Heated, leather-wrapped steering wheel

• Dual-zone automatic climate control

• Power-adjustable front seats with lumbar support and memory settings

• Large center touchscreen with GMC Infotainment System

• Wireless Apple CarPlay and Android Auto

• Multiple USB ports and available 120V outlets

Safety & Driver Assistance:

• Forward Collision Alert with Automatic Emergency Braking

• Lane Departure Warning

• Front and Rear Park Assist

• Blind Spot Monitoring with Rear Cross Traffic Alert

• Trailer Sway Control and Tow/Haul Mode

Cargo & Utility:

• MultiPro Tailgate with six functional configurations

• Spray-in bedliner for added durability

• LED cargo bed lighting for improved visibility

• Large trailering mirrors with integrated turn signals

The 2020 GMC Sierra 2500HD AT4 with the Technology and AT4 Premium Packages is a luxurious and highly capable heavy-duty truck that’s ready for off-road adventures, towing heavy loads, and delivering top-tier comfort and advanced features for daily driving or weekend exploring.

The 2020 GMC Sierra 2500HD AT4 delivers rugged off-road capability combined with premium luxury and advanced technology. Powered by a 6.6L Duramax Turbo-Diesel V8, and equipped with the Technology Package and AT4 Premium Package, this heavy-duty truck is built to tackle