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2021 GMC Sierra 2500 HD AT4



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Vehicle Information

VIN: 1GT49PEY3MF268588
Stock #: 240330A
Model Code: TK20743
  • Body Style Crew Cab
  • Exterior Color Onyx Black
  • Interior Color Jet Black With Kalahari Accents, Perforated Front Leather Seat Trim
  • Mileage 85,449
  • Engine 6.6L Duramax Turbo-Diesel V8 engine
  • Transmission Automatic / 4WD

Highlighted Features

Feature availability subject to final vehicle configuration.

Dealer Comments

2021 GMC AT4 Sierra 2500HD

This vehicle Contains the following features and options: Gooseneck/5th Wheel Package (Bed View Camera w/2 Trailer Camera Provisions), Gooseneck/5th Wheel Prep Package, AT4 Preferred Package (Bose Premium 7 Speaker Sound System, HD Surround Vision, LED Smoked Amber Roof Marker Lamps, Power Sliding Rear Window w/Defogger, Radio: Premium GMC Infotainment Sys w/Navigation, Universal Home Remote, and Wireless Charging), Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Perimeter Lighting, Rear Cross Traffic Alert, and Ultrasonic Front & Rear Park Assist), Preferred Equipment Group 4SB (12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 USB Ports, 2 USB Ports (1st Row), 2-Speed Active Transfer Case, 2nd Row Dual USB Charge-Only Ports, 4.2 Diagonal Color Display Driver Info Center, 4G LTE Wi-Fi Hotspot Capable, Compass Located In Instrument Cluster, Deep-Tinted Glass, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Floor-Mounted Center Console, Front Prem Floor Liners w/Removable Carpet Insert, GMC Connected Access Capable, HD Rear Vision Camera, Heated & Ventilated Front Bucket Seats, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seats, Integrated Trailer Brake Controller, Keyless Open & Start, LED Cargo Area Lighting, Manual Tilt-Wheel/Telescoping Steering Column, OnStar & GMC Connected Services Capable, Painted Black Surround Grille, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Rear Windows w/Express Down, Power Windows w/Driver Express Up/Down, Rear Prem Floor Liners w/Removable Carpet Insert, Rear Wheelhouse Liners, Red Recovery Hooks, Remote Vehicle Starter System, Spray-On Pickup Box Bed Liner w/AT4 Logo, Steering Wheel Audio Controls, Unauthorized Entry Theft-Deterrent System, and Wireless Phone Projection), Snow Plow Prep/Camper Package (220 Amps Alternator), X31 Off-Road Package (Hill Descent Control), 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 18 Machined Aluminum Wheels, 20 Machined Aluminum Wheels, 3.42 Axle Ratio, 3.73 Rear Axle Ratio, 4-Wheel Disc Brakes, 6 Speakers, 6-Speaker Audio System Feature, ABS brakes, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM with 360L, AppLink/Apple CarPlay and Android Auto, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Automatic temperature control, Brake assist, Bumpers: body-color, Compass, Delay-off headlights, Driver door bin, Driver Memory, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electronic Stability Control, Engine Block Heater, Exhaust Brake, Front anti-roll bar, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, HD Radio, Heated door mirrors, Heated front seats, Heated rear seats, Heated steering wheel, Heavy-Duty 80 Amp Battery, Hitch Guidance w/Hitch View, Illuminated entry, In-Vehicle Trailering System App, Low tire pressure warning, Memory seat, Occupant sensing airbag, Off-Road Suspension, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appointed Front Seat Trim, Pickup Box, Power door mirrors, Power driver seat, Power passenger seat, Power steering, Power windows, Premium audio system: Premium GMC Infotainment System, Radio: AM/FM w/Premium GMC Infotainment System, Rear reading lights, Rear seat center armrest, Rear step bumper, Rear window defroster, Remote keyless entry, Security system, SiriusXM w/360L, Speed control, Speed-sensing steering, Split folding rear seat, Steering wheel mounted audio controls, Tachometer, Telescoping steering wheel, Tilt steering wheel, Traction control, Trailer Tire P

Eligible Benefits

View AutoCheck report.

All Features

  • Radio, HD
  • 4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
  • Wireless Phone Projection for Apple Carplay and Android Auto
  • Bluetooth® for phone, connectivity to vehicle infotainment system
  • SiriusXM Radio with 360L Equipped with SiriusXM with 360L. Enjoy a trial subscription of the All Access package for the full 360L experience, with a greater variety of SiriusXM content, a more personalized experience and easier navigation. With the All Access package, you can also enjoy your favorites everywhere you go, with the SiriusXM app, online and at home on compatible connected devices. (IMPORTANT: The SiriusXM radio trial package is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. See the SiriusXM Customer Agreement at www.siriusxm.com for complete terms and how to cancel. All fees, content, features, and availability are subject to change. GM connected vehicle services vary by vehicle model and require active service plan, working electrical system, cell reception and GPS signal. See onstar.com for details and limitations.)
  • SiriusXM Radio
  • Audio system, Premium GMC Infotainment System with Navigation and 8" diagonal color touch-screen:
    • includes multi-touch display, AM/FM stereo, Bluetooth® streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones, advanced voice recognition, in-vehicle apps, personalized profiles for infotainment and vehicle settings. Includes greater memory.
    • Includes (PZ8) Hitch Guidance with hitch view.)
  • Bose Sound System, premium 7-speaker system: with Richbass woofer
  • Bed Step, Black integrated on forward portion of bed on driver and passenger side
  • Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
  • Tailgate, GMC MultiPro Tailgate with six functional load/access features
  • Glass, deep-tinted
  • Door handles, body-color
  • 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])
  • Moldings, beltline, Black
  • Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
  • Taillamps, LED signature taillight with LED stop and reverse light
  • Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
  • Wheelhouse liners, rear
  • Grille (Painted Black surround with high gloss Black mesh and Black chrome inserts.)
  • LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
  • Tire, spare LT275/70R18 all-terrain, blackwall
  • Fog lamps, LED
  • Cargo tie downs (12), fixed rated at 500 lbs per corner
  • Bumper, front, body-color lower
  • Headlamps, LED reflector (high intensity) with LED turn signals and LED signature Daytime Running Lamps
  • Bumper, rear body-color with bumper CornerSteps
  • 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).)
  • CornerStep, rear bumper
  • Mirror caps, high gloss Black
  • Tailgate and bed rail protection caps, top
  • Lamps, Smoked Amber LED roof marker, (LED)
  • Tires, LT275/65R20 all-terrain, blackwall
  • Winter Grille Cover
  • Wheels, 20" (50.8 cm) machined aluminum: with high gloss Black accents
  • License plate kit, front
  • Onyx Black
  • USB ports, 2 (first row) located on instrument panel
  • Driver Information Center, 4.2" diagonal color display includes driver personalization
  • Power outlet, rear auxiliary, 12-volt
  • USB ports, dual, charge-only (2nd row)
  • Mirror, inside rearview auto-dimming
  • Seats, ventilated driver and front passenger
  • Defogger, rear-window electric
  • Premium Floor Liners with removable carpet insert, front
  • Steering column, lock control, electrical
  • Rear Seat Reminder
  • Remote vehicle starter system
  • Steering column, manual Tilt-Wheel and telescoping
  • Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
  • Window, power front, passenger express up/down
  • Steering wheel audio controls
  • 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)
  • Premium Floor Liners with removable carpet insert, rear
  • Floor covering, color-keyed carpeting
  • Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
  • USB Ports (Inside Console with bucket seats), 2 also includes 1 SD card reader and auxiliary jack
  • Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
  • Seats, front bucket with center console (STD)
  • Seat trim, Perforated leather-appointed front
  • Windows, power front, drivers express up/down
  • Compass, located in instrument cluster
  • Seat adjuster, driver 10-way power including lumbar
  • GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details)
  • Door locks, power
  • Cruise control, steering wheel-mounted
  • Seat adjuster, passenger 10-way power including lumbar
  • Steering wheel, heated
  • Theft-deterrent system, unauthorized entry
  • Air conditioning, dual-zone automatic climate control
  • Windows, power rear, express down
  • Driver memory recalls driver "presets" for power driver seat and outside mirrors
  • Keyless Open and Start
  • Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
  • Exterior Temperature Display, located in radio display
  • Air vents, rear
  • Seating, heated driver and front outboard passenger
  • Seats, heated second row outboard seats
  • Steering wheel, leather-wrapped
  • Power outlet, front auxiliary, 12-volt
  • Universal Home Remote
  • Jet Black with Kalahari Accents, Perforated front leather seat trim
  • Window, power, rear sliding: with rear defogger
  • Wireless Charging
  • 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
  • Hill Descent Control
  • Skid Plates protect the oil pan, front axle and transfer case
  • Pickup bed includes bed assist step (STD)
  • Air filter, heavy-duty
  • Air filtration monitoring
  • Brake lining wear indicator
  • Transfer case, two-speed active, electronic Autotrac with push button control
  • Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
  • Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
  • Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
  • Trailer brake controller, integrated
  • Suspension, Off-Road includes twin-tube shocks
  • Four wheel drive
  • Auto-locking rear differential
  • Exhaust brake
  • GVWR, 11,350 lbs. (5148 kg)
  • Emissions, Federal requirements
  • Rear axle, 3.42 ratio
  • 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
  • Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
  • AT4 Preferred Package: includes (UVN) Bed View Camera, (UVS) HD Surround Vision with Two Trailer View Camera Provisions, (UG1) Universal Home Remote, (A48) rear sliding power window, (IOT) 8" diagonal Premium GMC Infotainment with navigation, (UQA) Bose Premium Audio System, (U01) Roof Marker Lamps and (K4C) Wireless Charging
  • AT4 Preferred Equipment Group: includes standard equipment
  • Driver Alert Package I:
    • includes (UD5) Front and Rear Park Assist, (UKC) Lane Change Alert with Side Blind Zone Alert and (UFG) Rear Cross Traffic Alert
    • (Includes Perimeter Lighting.
  • Snow Plow Prep/Camper Package: includes (KW5) 220-amp alternator, includes increased front GAWR on Heavy Duty models, (NZZ) skid plates (transfer case and oil pan), pass through dash grommet hole and roof emergency light provisions. Contact GM Upfitter Integration at www.gmupfitter.com for plow installation details and assistance. Note: if ordered for Camper usage, recommend ordering (UY2) Trailering wiring provisions
  • Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
  • Daytime Running Lamps, LED signature lighting
  • Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
  • Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire)
  • 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 with Hitch View with image adjustment, Pan/Zoom/Tilt
  • OnStar and GMC connected services capable (Terms and limitations apply. See onstar.com or dealer for details.)
  • 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
  • Lane Change Alert with Side Blind Zone Alert
  • Rear Cross Traffic Alert
  • Trailer Tire Pressure Monitor Sensors: includes set of 4 sensors. Sensor functionality requires (U1D) In-vehicle Trailering App to be ordered with the vehicle and installed by the factory. Sensors will be shipped loose with the truck and will need to be installed on trailer by customer. System is capable of monitoring up to 6 wheels. Additional or replacement sensors are available through GM Accessories
  • HD Surround Vision with Two Trailer View Camera Provisions: provides the driver with an overhead view of the scene around the vehicle on a center stack display
  • Front and Rear Park Assist, ultrasonic
  • Bed View Camera: camera in the CHMSL to show a view of the cargo bed, display located in infotainment screen, includes Two Trailer Camera Provisions
  • StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
  • DriveType
    • DriveType: Four Wheel Drive
  • Fuel Economy
    • City: 0 MPG
    • Hwy: 0 MPG
    • Combined: 0 MPG
  • Fuel System
    • Fuel System: Direct Injection
  • Fuel Tank Capacity
    • Fuel Tank Capacity: 36 gal
  • Fuel Type
    • Fuel Type: Diesel Fuel
  • Horse Power
    • Horse Power: 445
  • Rear Wheel
    • Rear Wheel: Single
  • Trailering Capacity
    • Trailering Capacity: 18500 lbs
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Prices do not include additional fees and costs of closing, including government fees and taxes, any finance charges, any dealer documentation fees, any emissions testing fees or other fees. All prices, specifications and availability subject to change without notice. Contact dealer for most current information

MPG estimates on this website are EPA estimates; your actual mileage may vary. For used vehicles, MPG estimates are EPA estimates for the vehicle when it was new. The EPA periodically modifies its MPG calculation methodology; all MPG estimates are based on the methodology in effect when the vehicles were new (please see the Fuel Economy portion of the EPA's website for details, including a MPG recalculation tool).