2021 GMC Sierra 3500HD AT4

Duramax Diesel Power. Heavy-Duty Capability. Off-Road Ready.

AT4 Crew Cab Built For Work And Adventure

This 2021 GMC Sierra 3500HD AT4 delivers exceptional Duramax diesel performance, serious towing capability, and rugged off-road styling. Finished in Summit White with a Jet Black/Kalahari interior, it offers a bold look with premium touches.

Key Features

146,080 miles

Duramax 6.6L V8 Turbo Diesel engine massive torque and towing capability

10-Speed Automatic Transmission

Four-Wheel Drive (4WD)

Summit White exterior

Jet Black with Kalahari accents interior

AT4 trim with off-road capability

Factory off-road suspension

Skid plates and underbody protection

All-terrain tires

Leather-appointed seating

Heated and ventilated front seats

Premium audio system

Large touchscreen infotainment system

Apple CarPlay & Android Auto

Backup camera and driver-assist features

Spacious Crew Cab interior

Important Vehicle Disclosure

This vehicle is being sold as-is due to mileage.

Summary

This 2021 GMC Sierra 3500HD AT4 combines powerful Duramax diesel performance, heavy-duty capability, and rugged off-road features. With its premium interior and 4WD system, its a great option for buyers who need serious performance with added comfort.

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Options:

AT4 Preferred Package

AT4 Premium Plus Package

Driver Alert Package I

Driver Alert Package II

Preferred Equipment Group 4SB

Technology Package

X31 Off-Road Package

6 Speakers

6-Speaker Audio System Feature

AM/FM radio: SiriusXM with 360L

Bose Premium 7 Speaker Sound System

HD Radio

Premium audio system: Premium GMC Infotainment System

Radio: AM/FM w/Prem GMC Infotainment System & Navi

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 Front Passenger Windows w/Express Up/Down

Power Front Windows w/Driver Express Up/Down

Power Rear Windows w/Express Down

Power steering

Power windows

Remote keyless entry

Remote Vehicle Starter System

Steering wheel mounted audio controls

Universal Home Remote

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

Power Sunroof

Pickup Bed

Red Recovery Hooks

Brake assist

Electronic Stability Control

Lane Departure Warning System

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 Amp Alternator

Engine Block Heater

Exhaust Brake

Heavy-Duty 80 Amp Battery

AT4 High Clearance Step (LPO)

Auto-dimming door mirrors

Bumpers: body-color

Front License Plate Kit

Heated door mirrors

IntelliBeam Automatic High Beam On/Off

LED Cargo Area Lighting

LED Smoked Amber Roof Marker Lamps

Painted Blk Surround Grille w/High Gloss Blk Mesh

Power door mirrors

Power-Retractable Black Assist Steps

ProGrade Trailering System

Rear step bumper

Rear Wheelhouse Liners

Spray-On Pickup Bed Liner w/AT4 Logo

Turn signal indicator mirrors

Winter Grille Cover

2 USB Ports (First Row)

2 USB Ports Inside Console

2nd Row Dual USB Charge-Only Ports

4.2" Diagonal Color Display Driver Info Center

4G LTE Wi-Fi Hotspot Capable

8" Driver Information Center

Apple CarPlay/Android Auto

Auto-Dimming Inside Rearview Mirror w/Camera

Auto-dimming Rear-View mirror

Automatic Emergency Braking

Bed View Camera w/2 Trailer Camera Provisions

Compass

Compass Located In Instrument Cluster

Driver door bin

Driver vanity mirror

Floor-Mounted Center Console

Following Distance Indicator

Forward Collision Alert

Front reading lights

GMC Connected Access Capable

HD Rear Vision Camera

HD Surround Vision w/2 Trailer View Camera Provisions

Heated steering wheel

Illuminated entry

Lane Change Alert w/Side Blind Zone Alert

Multicolor 15" Diagonal Head-Up Display

OnStar & GMC Connected Services Capable

Outside temperature display

Overhead console

Passenger vanity mirror

Prem Front Floor Liners w/Removable Carpet Insert

Prem Rear Floor Liners w/Removable Carpet Insert

Rear Cross Traffic Alert

Rear reading lights

Rear seat center armrest

Safety Alert Seat

Tachometer

Telescoping steering wheel

Tilt steering wheel

Trip computer

Ultrasonic Front & Rear Park Assist

Voltmeter

Wireless Charging

Wireless Phone Projection

10-Way Power Driver Seat Adjuster w/Lumbar

10-Way Power Passenger Seat Adjuster w/Lumbar

2nd Row Heated Outboard Seats

Front Bucket Seats

Front Center Armrest

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 Driver & Front Passenger Seats

Ventilated front seats

Passenger door bin

Hitch Guidance w/Hitch View

In-Vehicle Trailering System App

Integrated Trailer Brake Controller

18" Machined Aluminum Wheels

20" Machined Aluminum Wheels

Alloy wheels

Deep-Tinted Glass

Power Sliding Rear Window w/Defogger

Variably intermittent wipers