This 2021 GMC Sierra 2500HD AT4 delivers the capability and comfort you need for work and life. Finished in white, this truck combines rugged capability with refined appointments designed for those who demand performance without compromise.

• Duramax 6.6L V8 Turbodiesel engine with 445 hp and 910 lb-ft of torque
• 10-Speed Automatic transmission with 4WD
• 220-Amp alternator and engine block heater for reliability
• X31 Off-Road Package with 2-Speed Active Transfer Case and Hill Descent Control
• Integrated Trailer Brake Controller with In-Vehicle Trailering System App
• Heated and ventilated front bucket seats with 10-way power adjustment and lumbar support
• Premium GMC Infotainment System with Apple CarPlay and Android Auto
• SiriusXM 360L satellite radio with HD Radio capability
• Spray-on pickup box bed liner with AT4 logo
• Heated steering wheel and auto-dimming rear-view mirror
• 4G LTE Wi-Fi hotspot capability
• OnStar and GMC Connected Services ready

The Duramax diesel engine is built for serious pulling and hauling, pairing proven reliability with impressive torque delivery. The truck's suspension and braking systems are engineered to handle demanding work conditions while the 4WD capability gives you confidence in challenging terrain. Off-road features like Hill Descent Control and the active transfer case demonstrate this truck's versatility.

Inside, the AT4 puts you in a commanding driving position with heated and ventilated seating, memory functions, and an adjustable steering column. Climate control comes through dual-zone air conditioning, heated rear seats, and rear window defroster. The cabin feels intentionally designed for long days behind the wheel, with premium materials and thought-out ergonomics.

Technology integration keeps you connected and informed. The infotainment system supports wireless phone projection, giving you seamless access to navigation and communications. Multiple USB ports throughout the cabin ensure your devices stay charged, while the 4G LTE hotspot turns your truck into a mobile workspace.

The AT4 package includes premium appointments like red recovery hooks, a painted black surround grille, and heated power door mirrors. Fog lights and fully automatic headlights enhance visibility, while the spray-on bed liner with AT4 branding adds both protection and personality to your work surface.

This Sierra 2500HD is equipped and ready to handle whatever you bring to it. Whether you're towing, hauling, or simply commanding the road, this truck delivers the performance and comfort that define the AT4 experience. We invite you to schedule a test drive and see this capability firsthand.

Options:

Preferred Equipment Group 4SB

X31 Off-Road Package

6 Speakers

6-Speaker Audio System Feature

AM/FM radio: SiriusXM with 360L

HD Radio

Premium audio system: Premium GMC Infotainment System

Radio: AM/FM w/Premium GMC Infotainment System

SiriusXM w/360L

Steering Wheel Audio Controls

Air Conditioning

Automatic temperature control

Electric Rear-Window Defogger

Front dual zone A/C

Rear window defroster

12-Volt Rear Auxiliary Power Outlet

120-Volt Bed Mounted Power Outlet

120-Volt Instrument Panel Power Outlet

Driver Memory

Memory seat

Power driver seat

Power steering

Power windows

Power Windows w/Driver Express Up/Down

Remote keyless entry

Remote Vehicle Starter System

Steering wheel mounted audio controls

Manual Tilt-Wheel/Telescoping Steering Column

Off-Road Suspension

Speed-sensing steering

Traction control

4-Wheel Disc Brakes

ABS brakes

Dual front impact airbags

Dual front side impact airbags

Electrical Lock Control Steering Column

Front anti-roll bar

Front wheel independent suspension

Keyless Open & Start

Low tire pressure warning

Occupant sensing airbag

Overhead airbag

Power Door Locks

Pickup Box

Brake assist

Electronic Stability Control

Hill Descent Control

Delay-off headlights

Front fog lights

Fully automatic headlights

Panic alarm

Security system

Unauthorized Entry Theft-Deterrent System

Speed control

2-Speed Active Transfer Case

220 Amps Alternator

Engine Block Heater

Exhaust Brake

Heavy-Duty 80 Amp Battery

Auto-dimming door mirrors

Bumpers: body-color

Front License Plate Kit

Heated door mirrors

LED Cargo Area Lighting

Painted Black Surround Grille

Power door mirrors

Rear step bumper

Rear Wheelhouse Liners

Red Recovery Hooks

Spray-On Pickup Box Bed Liner w/AT4 Logo

Turn signal indicator mirrors

Winter Grille Cover

2 USB Ports

2 USB Ports (1st Row)

2nd Row Dual USB Charge-Only Ports

4.2" Diagonal Color Display Driver Info Center

4G LTE Wi-Fi Hotspot Capable

Apple CarPlay/Android Auto

Auto-dimming Rear-View mirror

Compass

Compass Located In Instrument Cluster

Driver door bin

Driver vanity mirror

Floor-Mounted Center Console

Front Prem Floor Liners w/Removable Carpet Insert

Front reading lights

GMC Connected Access Capable

HD Rear Vision Camera

Heated steering wheel

Illuminated entry

OnStar & GMC Connected Services Capable

Outside temperature display

Overhead console

Passenger vanity mirror

Rear Prem Floor Liners w/Removable Carpet Insert

Rear reading lights

Rear seat center armrest

Tachometer

Telescoping steering wheel

Tilt steering wheel

Trip computer

Voltmeter

Wireless Phone Projection

10-Way Power Driver Seat Adjuster w/Lumbar

10-Way Power Passenger Seat Adjuster w/Lumbar

Front Bucket Seats

Front Center Armrest

Heated & Ventilated Front Bucket Seats

Heated 2nd Row Outboard Seats

Heated Driver & Front Outboard Passenger Seats

Heated front seats

Heated rear seats

Perforated Leather-Appointed Front Seat Trim

Power passenger seat

Split folding rear seat

Ventilated front seats

Passenger door bin

Hitch Guidance w/Hitch View

In-Vehicle Trailering System App

Integrated Trailer Brake Controller

18" Machined Aluminum Wheels

Alloy wheels

Deep-Tinted Glass

Power Front Passenger Windows w/Express Up/Down

Power Rear Windows w/Express Down

Variably intermittent wipers