Used 2021 GMCSierra 2500HD AT4

  • Diesel

    Exterior Color
    Onyx Black
    Interior Color
    Jet Black with Kalahari Accents
    Odometer
    98,812 miles
    Body/Seating
    Truck/5 seats
    Transmission
    ALLISON 10-SPEED AUTOMATIC
    Drivetrain
    Four Wheel Drive
    Engine
    8 Cylinder Engine
    VIN
    1GT49PEY6MF247427
    Stock Number
    260570A
    GMC Sierra 2500HD
    • AutoCheck

    Highlighted Features

    • Navigation system
    • Leather upholstery
    • Automatic temperature control
    • Premium audio system
    • Wireless phone connectivity
    • Parking sensors
    • Exterior parking camera front
    • Exterior parking camera left
    • Exterior parking camera right
    • Exterior parking camera rear
    • Front dual zone A/C
    • Auto-dimming rearview mirror

    Included Packages & Accessories

    • X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
    • ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (U1D) In-vehicle Trailering App
    • Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
    • GVWR, 10,650 lbs. (4831 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18 or 20 wheels or TK20943 and (L8T) 6.6L V8 gas engine with 17 wheels.)
    • Hill Descent Control
    • Transfer case, two-speed active, electronic Autotrac with push button control
    • Auto-locking rear differential
    • Four wheel drive
    • Cooling, external engine oil cooler
    • Cooling, auxiliary external transmission oil cooler
    • Air filter, heavy-duty
    • Air filtration monitoring
    • Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
    • Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
    • Trailer brake controller, integrated
    • In-vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed.)
    • Recovery hooks, Red
    • Skid Plates protect the oil pan, front axle and transfer case
    • Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
    • Suspension, Off-Road includes twin-tube shocks
    • Steering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
    • Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
    • Brake lining wear indicator
    • Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
    • Tire, spare LT275/70R18 all-terrain, blackwall
    • Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
    • Bumper, front, body-color lower
    • Bumper, rear body-color with bumper CornerSteps
    • CornerStep, rear bumper
    • Bed Liner, Spray-on, Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (AT4 logo replaces GMC logo. Not available with any Ship Thrus EXCEPT (VSH), (VTV), (TCH) or (TCE).)
    • Bed Step, Black integrated on forward portion of bed on driver and passenger side
    • Cargo tie downs (12), fixed rated at 500 lbs per corner
    • Wheelhouse liners, rear
    • Moldings, beltline, Black
    • Grille (Painted Black surround with high gloss Black mesh and Black chrome inserts.)
    • Fog lamps, LED
    • Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
    • LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
    • Taillamps, LED signature taillight with LED stop and reverse light
    • Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31 [84.25mm]) (Molded in color Black.)
    • Mirror caps, high gloss Black
    • Glass, deep-tinted
    • Door handles, body-color
    • Tailgate, GMC MultiPro Tailgate with six functional load/access features
    • Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
    • Tailgate and bed rail protection caps, top
    • Radio, HD
    • Audio system feature, 6-speaker system
    • 4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
    • Seat adjuster, driver 10-way power including lumbar
    • Seat adjuster, passenger 10-way power including lumbar
    • Driver memory recalls driver presets for power driver seat and outside mirrors
    • Seats, heated second row outboard seats
    • Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models, includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
    • Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
    • Floor covering, color-keyed carpeting
    • Steering wheel, leather-wrapped
    • Steering wheel, heated
    • Steering wheel audio controls
    • Steering column, manual Tilt-Wheel and telescoping
    • Steering column, lock control, electrical
    • Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
    • Driver Information Center, 4.2 diagonal color display includes driver personalization
    • Exterior Temperature Display, located in radio display
    • Compass, located in instrument cluster
    • Rear seat reminder
    • Remote vehicle starter system
    • Cruise control, steering wheel-mounted
    • Theft-deterrent system, unauthorized entry
    • Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
    • USB ports, dual, charge-only (2nd row)
    • Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
    • Air conditioning, dual-zone automatic climate control
    • Air vents, rear
    • Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
    • GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details)
    • StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
    • Airbags, dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
    • Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
    • Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver

    Standard Specifications

    • 1-touch down
    • 1-touch up
    • Air conditioning
    • Auto-dimming rearview mirror
    • Automatic temperature control
    • Driver door bin
    • Driver vanity mirror
    • Front beverage holders
    • Front dual zone A/C
    • Garage door transmitter
    • Heated steering wheel
    • Illuminated entry
    • Memory seat
    • Navigation system
    • Overhead console
    • Passenger door bin
    • Passenger vanity mirror
    • Power windows
    • Proximity key: doors and push button start
    • Rear beverage holders
    • Rear door bins
    • Remote engine start: keyfob
    • Remote keyless entry
    • Speed control
    • Telescoping steering wheel
    • Tilt steering wheel
    • Alloy wheels
    • Front anti-roll bar
    • Front wheel independent suspension
    • Power steering
    • Single rear wheels
    • Speed-sensing steering
    • Tires: all-terrain
    • 1st row LCD monitors: 2
    • AM/FM radio: SiriusXM with 360L
    • Premium audio system: Premium GMC Infotainment System
    • Primary LCD size: 8.0"
    • Smart device integration: Android Auto/Apple CarPlay
    • Speaker type: Bose
    • Speakers: 7
    • Steering wheel mounted audio controls
    • Wireless phone connectivity: Bluetooth
    • Front center armrest
    • Front seats: bucket
    • Heated front seats
    • Heated rear seats
    • Leather upholstery
    • Max seating capacity: 5
    • Power 2-way driver lumbar support
    • Power 2-way passenger lumbar support
    • Power driver seat
    • Power passenger seat
    • Rear seat center armrest
    • Rear seats: split-bench
    • Rear seats Folding position: fold-up cushion
    • Seat Upholstery: leather
    • Split folding rear seat
    • Ventilated front seats
    • Block heater
    • Compressor: intercooled turbo
    • Cylinder configuration: V-8
    • Drive type: four-wheel
    • Engine liters: 6.6L
    • Engine location: front
    • Fuel tank capacity: 36.0gal.
    • Horsepower: 445hp @ 2,800RPM
    • Hybrid traction battery type: none
    • Manual-shift auto
    • Mode select transmission
    • Number of valves: 32
    • Rear locking differential
    • Recommended fuel: Diesel
    • Standard fuel economy fuel type: gasoline
    • Torque: 910 lb.-ft. @ 1,600RPM
    • Transmission: 10 speed automatic
    • Variable valve control
    • Ground clearance (min): 257mm (10.1")
    • Auto-dimming door mirrors
    • Bedliner
    • Bumpers: body-color
    • Heated door mirrors
    • Left rear passenger door: conventional
    • Power door mirrors
    • Rear cargo: tailgate
    • Rear step bumper
    • Right rear passenger: conventional
    • Skid plates
    • Trailer hitch receiver
    • Trailer sway control
    • Turn signal indicator mirrors
    • Compression ratio: 16.00 to 1
    • Curb weight: 3,515kg (7,749lbs)
    • Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
    • Engine displacement: 6.6 L
    • Engine horsepower: 445hp @ 2,800RPM
    • Engine torque: 910 lb.-ft. @ 1,600RPM
    • Exterior body width: 2,079mm (81.8")
    • Exterior height: 2,023mm (79.7")
    • Exterior length: 6,352mm (250.1")
    • Front headroom: 1,093mm (43.0")
    • Front hiproom: 1,554mm (61.2")
    • Front legroom: 1,131mm (44.5")
    • Front shoulder room: 1,677mm (66.0")
    • Payload: 1,616kg (3,563lbs)
    • Rear headroom: 1,013mm (39.9")
    • Rear hiproom: 1,530mm (60.2")
    • Rear legroom: 1,102mm (43.4")
    • Rear shoulder room: 1,659mm (65.3")
    • Turning radius: 8.0m (26.3')
    • Wheelbase: 4,037mm (158.9")
    • Appearance: analog
    • Blind spot: Lane Change Alert with Side Blind Zone Alert warning
    • Compass
    • Delay-off headlights
    • Exterior parking camera cargo
    • Exterior parking camera front
    • Exterior parking camera left
    • Exterior parking camera rear
    • Exterior parking camera right
    • Front fog lights
    • Front reading lights
    • Fully automatic headlights
    • Low tire pressure warning
    • Oil pressure gauge
    • Outside temperature display
    • Parking sensors: UltraSonic front and rear
    • Rear reading lights
    • Rear window defroster
    • Tachometer
    • Trip computer
    • Variably intermittent wipers
    • Voltmeter
    • 4 wheel disc brakes
    • ABS brakes
    • Brake assist
    • Dual front impact airbags
    • Dual front side impact airbags
    • Electronic stability
    • Ignition disable
    • Occupant sensing airbag
    • Overhead airbag
    • Panic alarm
    • Perimeter/approach lights
    • Rear collision: Rear Cross-Traffic Alert warning
    • Security system
    • Traction control

    Dealer Notes

    This Onyx Black 2021 GMC Sierra 2500HD AT4 with 98,812 miles has the style and comfort to fit your lifestyle!


    No Accidents!

    One Owner!

    This vehicle is equipped with:

    Driver Alert Package I

    • Perimeter Lighting
    • Ultrasonic Front and Rear Park Assist
    • Rear Cross Traffic Alert
    • Lane Change Alert with Side Blind Zone Alert

    Preferred Equipment Group 4SB

    • Power Front Passenger Windows with Express Up/down
    • Power Rear Windows with Express Down
    • Deep-Tinted Glass
    • Keyless Open and Start
    • Power Door Locks
    • Power Windows with Driver Express Up/down
    • Rear Wheelhouse Liners
    • Rear Premium Floor Liners with Removable Carpet Insert
    • Front Premium Floor Liners with Removable Carpet Insert
    • Remote Vehicle Starter System
    • Electric Rear-Window Defogger
    • Spray-On Pickup Box Bed Liner with AT4 Logo
    • Compass Located in Instrument Cluster
    • Floor-Mounted Center Console
    • Painted Black Surround Grille
    • Integrated Trailer Brake Controller
    • Heated Driver and Front Outboard Passenger Seats
    • Heated 2nd Row Outboard Seats
    • 120-Volt Bed Mounted Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • 12-Volt Rear Auxiliary Power Outlet
    • Heated and Ventilated Front Bucket Seats
    • 2 USB Ports
    • 2 USB Ports (1st Row)
    • Electrical Lock Control Steering Column
    • Manual Tilt-Wheel/telescoping Steering Column
    • 2-Speed Active Transfer Case
    • ProGrade Trailering System
    • 4.2 Diagonal Color Display Driver Info Center
    • OnStar and GMC Connected Services Capable
    • LED Cargo Area Lighting
    • Red Recovery Hooks
    • Steering Wheel Audio Controls
    • 2nd Row Dual USB Charge-Only Ports
    • Unauthorized Entry Theft-Deterrent System
    • HD Rear Vision Camera
    • Wireless Phone Projection
    • X31 Off-Road Package

    AT4 Preferred Package

    • Power Sliding Rear Window with Defogger
    • Premium GMC Infotainment System Radio with Navigation
    • Wireless Charging
    • LED Smoked Amber Roof Marker Lamps
    • Universal Home Remote
    • Bose Premium 7 Speaker Sound System
    • Bed View Camera with Two Trailer Camera Provisions
    • HD Surround Vision


    Technology and Telematics

    • Smart device mirroring - Smartphone, meet smart car. You can control your device through your vehicle's infotainment system. Smart device mirroring brings together safety and convenience by making it easier to find what you're looking for while keeping your eyes on the road.
    • Android Auto/Apple CarPlay smart device wireless mirroring
    • Apple CarPlay/Android Auto smart device wireless mirroring
    • Mobile hotspot - WiFi on the fly. Connect your devices to the Internet through your vehicle's private mobile hotspot and take the internet wherever your journey takes you, without eating up your data allowance. Find the hotspot with mobile hotspot.
    • Mobile hotspot - WiFi on the fly. Connect your devices to the Internet through your vehicle's private mobile hotspot and take the internet wherever your journey takes you, without eating up your data allowance. Find the hotspot with mobile hotspot.


    It also has:




    PICKUP BED, EMISSIONS, CONNECTICUT, DELAWARE, MAINE, MARYLAND, MASSACHUSETTS, NEW JERSEY, NEW YORK, OREGON, PENNSYLVANIA, RHODE ISLAND, VERMONT AND WASHINGTON STATE REQUIREMENTS, ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE, TRANSMISSION, ALLISON 10-SPEED AUTOMATIC, GVWR, 11,350 LBS. (5148 KG), REAR AXLE, 3.42 RATIO, WHEELS, 18 (45.7 CM) MACHINED ALUMINUM WHEEL, TIRES, LT275/70R18E ALL-TERRAIN, BLACKWALL, ONYX BLACK, SEATS, FRONT BUCKET, JET BLACK WITH KALAHARI ACCENTS, PERFORATED FRONT LEATHER SEAT TRIM, AUDIO SYSTEM, PREMIUM GMC INFOTAINMENT SYSTEM WITH NAVIGATION AND 8 DIAGONAL COLOR TOUCH-SCREEN, AT4 PREFERRED PACKAGE, DRIVER ALERT PACKAGE I, ENGINE BLOCK HEATER, ALTERNATOR, 220 AMPS, EXHAUST BRAKE, LPO, SPORT STEP, BLACK, WINTER GRILLE COVER, LAMPS, SMOKED AMBER LED ROOF MARKER, (LED), LICENSE PLATE KIT, FRONT, BOSE SOUND SYSTEM, PREMIUM 7-SPEAKER SYSTEM, WINDOW, POWER, REAR SLIDING, UNIVERSAL HOME REMOTE, WIRELESS CHARGING, FRONT AND REAR PARK ASSIST, ULTRASONIC, HD SURROUND VISION WITH TWO TRAILER VIEW CAMERA PROVISIONS, BED VIEW CAMERA, REAR CROSS TRAFFIC ALERT, LANE CHANGE ALERT WITH SIDE BLIND ZONE ALERT
    Ask for a Auto Check vehicle history report on any of our used vehicles in inventory.

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    Come in to see us today 2380 Military Rd Niagara Falls NY 14304 or call 716-297-5800.

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
    Overall3.7Out of 5
    • Transmission trash

      By Jason on Monday, April 07, 2025

      2.0
      Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk
    • Infotainment system unreliable!

      By Brian C on Friday, June 27, 2025

      3.0
      The servicing dealer has been great, the GM engineers not so much! The truck will without warning have no sound for the radio and the blinkers. GM told the dealership to reprogram then when that didn't work they said replace the amplifier and when that didn't work, they said replace a module, and when that didn't work they said to replace the amplifier again, and when that didn't work they said we know it's a known problem but we don't know how to fix it. All of this with less than 9k miles. The dealer has done everything that GM has asked them to do, but none of it works. It's very frustrating to pay this much for a truck and you can't get the radio to stay working. It also got away from the factory with paint damage and a dent in the hood,( the dent is from the inside out on a double wall). I thought I was upgrading when I went from a F250 Lariat to a Denali, but I may have traded one headache for another.
    • Fantastic truck

      By Jjj on Sunday, November 07, 2021

      5.0
      This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck!

    * The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. A negotiable administration fee, up to $115, may be added to the price of the vehicle.

    * Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.