2021 GMC Sierra 2500 HD AT4



  • $63,596 Huston Price

  • Sales price does not include $899 pre-delivery service charge, $99 private agency fee, $149 electronic filing fee, tax, tag, and other governmental fees.


Visit our Store

Vehicle Information

VIN: 1GT49PEY5MF306662
Stock #: 237581A
Model Code: TK20743
  • Condition Used
  • Body Style Crew Cab
  • Exterior Color Onyx Black
  • Interior Color Jet Black With Kalahari Accents, Perforated Front Leather Seat Trim
  • Mileage 45,708
  • Engine Engine: 6.6L V8 DuraMax Diesel, Turbo
  • Transmission Automatic
  • Fuel Type Diesel Fuel

Highlighted Features

Feature availability subject to final vehicle configuration. Please reference window sticker for more info.

Dealer Comments

Discover the ultimate in power, capability, and comfort with the 2021 GMC Sierra 2500HD AT4. This exceptional heavy-duty pickup is engineered to conquer any terrain, while delivering a premium driving experience that will exceed your expectations.

Tailored to your adventurous spirit, the Sierra 2500HD AT4 boasts an impressive array of features:

- Duramax 6.6L V8 Turbodiesel engine with 445 hp and 910 lb-ft of torque
- Dual 220-Amp primary and 170-Amp auxiliary alternators for unparalleled electrical capacity
- Gooseneck/5th Wheel Prep Package for effortless towing
- Heavy Duty Front Spring/Camper Package for enhanced payload and stability
- X31 Off-Road Package with Hill Descent Control for superior off-road performance

The attention to detail is evident throughout, from the Spray-On Pickup Box Bed Liner with the AT4 logo to the Heated and Ventilated Front Bucket Seats, ensuring your driving experience is both rugged and refined.

Connectivity and technology are seamlessly integrated, with features like the Premium GMC Infotainment System, 4G LTE Wi-Fi Hotspot, and Wireless Phone Projection, keeping you connected and entertained on every journey.

Safety is paramount, with a suite of advanced driver-assistance technologies, including the Hitch Guidance with Hitch View, Integrated Trailer Brake Controller, and the Bed View Camera with Trailer Camera Provisions, providing you with the confidence to tackle any task.

Whether you're tackling the toughest terrain or simply seeking a premium work truck, the 2021 GMC Sierra 2500HD AT4 is the ultimate expression of power, capability, and refinement. Experience the difference for yourself and schedule a test drive today.

Eligible Benefits

All Features

  • HD Radio
    • Provides consumers with additional channels known as HD2, HD3 and HD4
    • Transmits Program Service Data, such as song titles and artist information
  • 4G LTE Wi-Fi® hotspot capable
    • Terms and limitations apply. See onstar.com or dealer for details.
    • Terms and limitations apply. See onstar.com or dealer for details.
    • May require additional optional equipment
  • 8" diagonal Premium GMC Infotainment System
    • Multi-touch display and AM/FM/SiriusXM1(trial subscription), stereo
    • HD Radio capability
    • Bluetooth®®2 streaming audio for music and select phones
    • Apple CarPlay™ capability for compatible phones3
    • Android Auto™ capability for compatible phones4
    • Use, control and manage select smartphone apps through the Infotainment system
    • Voice-activated technology for phone
    • USB port(s)5 to play stored audio files through your vehicle's audio system
  • Wireless Phone Projection for Apple Carplay and Android Auto
  • 6-speaker audio system
    • Speakers are positioned throughout the cabin for outstanding sound quality and an enjoyable listening experience
  • Bluetooth®®
    • Pair your compatible mobile phone to your vehicle's infotainment system1
    • Place and receive hands-free phone calls
    • Store your phone's contact list in the system to place an outgoing call quickly using the touch-screen display or voice command system
    • With streaming audio capability, you can listen to files stored on your phone or Bluetooth® digital media device
  • SiriusXM® with 360L trial subscription
    • Enjoy a 3-month trial subscription to the SiriusXM All Access package and enjoy the full SiriusXM with 360L experience1
    • This vehicle is equipped with SiriusXM with 360L— a greater variety of SiriusXM content, a more personalized experience and easier navigation. For the full SiriusXM with 360L experience, a SiriusXM All Access Package is required. If you subscribe to a lower package, certain features of 360L will not be available
    • With the All Access Package, you can also enjoy your favorites anywhere life takes you, with the SiriusXM app, online and at home on compatible connected devices
    • May require additional optional equipment. Some features, including streaming content and listening recommendations require GM connected vehicle services
    • May require additional optional equipment
  • SiriusXM Radio
  • Bed Step, Black integrated on forward portion of bed on driver and passenger side
  • Tailgate with EZ Lift assist, power lock & release
    • Hitch area lighting
    • May require additional optional equipment
  • GMC MultiPro Tailgate
    • Six function tailgate designed to help improve loading, unloading and accessing the cargo box
    • Hitch area lighting
    • Power lock and release
    • May require additional optional equipment
  • Deep-tinted glass
    • Provides added protection from sun and glare
  • Body-color door handles
  • Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
    • Chrome mirror caps
    • Power folding/extending
    • Lower convex mirrors
    • Heated upper glass
    • Integrated turn signal indicators
    • Puddle lamps
    • Perimeter lighting
    • Auxiliary lighting
    • Extends 3.31-inches
    • AT4 features molded in color Black mirror caps
  • Black beltline moldings
  • Spare tire carrier lock
    • Helps keep spare tire secure
    • Utilizes the same key as the door and ignition
  • LED signature tail lamps
    • C-shaped LED taillamps with LED stop and reverse light
    • Brighter and lasts longer than traditional incandescent bulbs
  • Cab-mounted cargo area lamps
    • Activated by switch located on center switch bank
    • Illuminates the cargo bed area
  • Rear wheelhouse liners
    • Help protect your truck's rear wheelhouse area from damage caused by dirt, rocks, mud, road salt and the weather
    • May require additional optional equipment
  • Grille (Painted Black surround with high gloss Black mesh and Black chrome inserts.)
  • Cargo bed LED lighting
    • Provides light to find cargo in the bed
    • Rear pillar lamps
    • May require additional optional equipment
  • 18" LT275/70R18 all-terrain, blackwall spare tire
    • May require additional optional equipment
  • LED fog lamps
    • Help minimize glare in adverse driving conditions
  • Cargo tie-downs
    • 12-fixed rated at 500 lbs. per corner
  • Body-color front bumper
  • LED reflector (high intensity) headlamps with LED turn signals and LED signature Daytime Running Lamps
    • C-shaped LED headlamps with signature lighting and innovative light blade technology
  • Body-color rear bumper
  • Spray-on bedliner
    • Provides a Black, textured, non-skid surface that helps protect the bed and minimizes cargo shifting
    • Covers the entire bed surface below side rails, front box top rail, gauge hole plugs and tie-downs
    • Chemically bonded, the sprayed-on liner permanently bonds to the truck bed, providing a watertight seal
    • Includes logo
    • Does not include spray-on liner on tailgate due to Black composite inner panel
  • CornerStep rear bumper
    • Helps make it easier to get into and out of the pickup bed
    • Located at each end of the rear bumper
    • Textured step pads to help provide secure footing
  • High gloss Black mirror caps
  • Tailgate and bed rail protection caps
  • 20" LT275/65R20 all-terrain, blackwall tires
  • Winter Grille Cover
    • May require additional optional equipment
  • 20" machined aluminum wheels with high gloss Black accents
  • Onyx Black
  • USB ports
    • 2 located on instrument panel1
  • 4.2" diagonal color Driver Information Center
    • Includes driver personalization, warning messages and vehicle information
  • 12-volt auxiliary rear power outlet
    • May require additional optional equipment
  • USB ports
    • Second row includes 2 USB charging-only ports1
  • Inside rearview auto-dimming mirror
    • Automatically dims the inside rearview mirror when it senses bright light from behind
    • When headlamp glare is no longer detected, the mirror returns to its normal state
  • Ventilated driver and front passenger seats
    • Separate buttons on the climate control panel allow you to choose from 3 levels of fan circulation
    • Individually controlled
    • Cooling feature includes both seatbacks and cushions
    • Includes heated front seating
    • May require additional optional equipment
  • Rear window defogger
    • Helps to keep your rear view clear of fog or frost
    • Utilizes a warming grid to help remove fog or frost from the rear window
  • Premium front floor liners with removable carpet insert
  • Steering column lock control
    • Helps prevent theft by allowing the steering wheel to operate only with the proper key fob
    • May require additional optional equipment
  • Rear Seat Reminder
    • Helps to remind the driver to check the back seat(s) before leaving the vehicle1
    • Activates when rear doors are opened and closed up to 10 minutes before or anytime while your vehicle is on
    • Under certain conditions, once the vehicle is switched off, designed to sound 5 audible chimes and display a visual message within the Driver Information Center
    • Activates only once each time the vehicle is turned on and off, and would require re-activation on a second trip
  • Manual tilt and telescoping steering column
    • Allows the driver to adjust the steering wheel up or down, and the steering column forward or back
    • May require additional optional equipment
  • Front center console
    • Includes reconfigurable feature with cupholders, cell phone storage, power cord management and file holder capacity
    • May require additional optional equipment
  • Power windows with driver and front passenger express-up/down
    • Quickly raises the window or lowers it with the touch of a button
    • If obstruction is detected, the anti-pinch feature will auto-reverse
  • Steering-wheel mounted controls
    • Allow the driver to easily operate the audio system and phone interface controls
    • May require additional optional equipment
  • Up-level rear seat with storage package
    • Full-length bench seat
    • Seatback storage on left and right side
    • Center fold out armrest with 2 cupholders
    • Underseat storage (full cab width)
  • Premium rear floor liners with removable carpet insert
  • Carpeted floor covering
    • Color-keyed to match the interior
  • 120-volt power outlet
    • 3-prong auxiliary household-style outlet
    • Located on the instrument panel
    • Makes it convenient for powering laptops, phone chargers and other electronic devices
    • May require additional optional equipment
  • 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
  • Front bucket seats
    • May require additional optional equipment
  • Seat trim, Perforated leather-appointed front
  • Power windows with driver express-up/down
    • Quickly raises the window or lowers it with the touch of a button
    • If an obstruction is detected, the anti-pinch feature will auto-reverse
  • Compass
    • Located in instrument cluster
  • 10-way power driver seat with power lumbar
    • Moves the seat forward and back, and up and down
    • Tilt the seat cushion and seatbacks
  • GMC Connected Access capable
    • Subject to terms. See onstar.com or dealer for details.
    • May require additional optional equipment
  • Power door locks
    • Programmable
    • Allows you to lock and unlock doors easily whether it's from the driver or front passenger seat or from outside using the key fob (when equipped)
  • Cruise control
    • Maintains a selected speed while driving
    • Automatically disengages when the vehicle's traction control system needs to limit wheelspin on slippery surfaces or when the StabiliTrak® stability control system detects an oncoming skid
    • Set and resume speed functions
    • Steering-wheel mounted controls to easily maintain and manage cruising speed
  • 10-way power front passenger seat
    • Forward and back
    • Up and down
    • Tilt seat cushion back and upright
    • Recline seatback up and down
    • Includes 2-way power lumbar
  • Heated steering wheel
    • With the press of a button the steering wheel quickly heats up to provide additional comfort on a cold day
    • May require additional optional equipment
  • Theft-deterrent unauthorized entry system
    • Sounds the horn and flashes the turn signals when someone attempts to open the vehicle without the proper key or remote transmitter
    • Helps deter unauthorized entry, helping to protect your vehicle
    • May require additional optional equipment
  • Dual-zone automatic climate control
    • Automatically maintains the selected temperatures for both the driver and front passenger
    • Allows individual climate settings for both driver and front passenger
    • Driver and front passenger can choose a temperature up to 30 degrees difference
    • May require additional optional equipment
  • Power windows with rear express-down
    • May require additional optional equipment
  • Driver memory
    • Recalls 2 driver presets for 10-way power seat and outside mirrors
    • May require additional optional equipment
  • 120-volt box-mounted power outlet
    • 3-prong auxiliary household-style outlet
    • Located in the pickup bed
    • May require additional optional equipment
  • Outside temperature display
    • Located in infotainment display
  • Rear air vents
    • Provides cabin comfort for rear occupants
  • Heated driver and front outboard passenger seats
    • Separate buttons on the climate control panel allow you to choose from 3 levels of warmth
    • At the touch of a button you can warm the cushions and seatbacks with multilevel temperature control
    • Individually controlled
    • Seats can be programmed to automatically warm up when it's cold out
    • May require additional optional equipment
  • Heated rear outboard seats
    • At the touch of a button you can warm the cushions
    • Provide comfort in cold weather for passengers in the rear outboard seating positions
    • Passengers have their own controls to set the temperature
    • May require additional optional equipment
  • Leather-wrapped steering wheel
    • May require additional optional equipment
  • 12-volt auxiliary front power outlet
    • May require additional optional equipment
  • Jet Black with Kalahari Accents, Perforated front leather seat trim
  • In-vehicle Trailering App
    • Checklist1
    • Trailer light sequencing
    • Trailer maintenance reminders
    • Trailer security alerts
    • Trailer mileage
    • Tow/haul reminder
    • Trailer electrical diagnostics
    • Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed
    • May require additional optional equipment
  • Red vertical recovery hooks
    • Two front frame-mounted1
  • Hill Descent Control
    • Uses antilock braking to help provide a smooth, controlled descent
    • Helps driver maintain control of the vehicle without depressing the brake pedal
    • Activates by pushing a button below the instrument panel
    • May require additional optional equipment
  • Skid plates
    • Help protect the front underbody, oil pan, differential case and transfer case
    • May require additional optional equipment
  • Pickup bed
    • Roll-formed high-strength steel
  • Heavy-Duty Air Filter
    • Thick construction helps to trap more dirt before it can enter the air intake
  • Brake pad wear indicator
  • Off-Road suspension
    • May require additional optional equipment
  • Autotrac® 2-speed transfer case with push button controls
    • 4-button control 2WD, Auto, 4WD, 4WD LO
    • 2WD High for most on-road and highway situations
    • 4WD High for snowy or wet roads when added traction is needed
    • 4WD Low for deep sand, mud or snow to provide maximum torque to all 4 wheels
    • When in AUTO mode, remains in 2WD mode until the system detects wheel slippage
      • Automatically engages 4WD until traction is regained
    • Neutral
      • ONLY used for towing vehicle (Dinghy tow capability)- allows vehicle to roll freely
    • May require additional optional equipment
  • Digital Variable Steering Assist
    • This system automatically adjusts steering based on speed, road conditions, and other inputs to help reduce driver fatigue
  • Fully boxed frame
    • Hydroformed front section
    • High-strength steel
  • 4-wheel antilock disc brakes
    • Help reduce wheel lockup and maintain steering control during hard braking on most slippery surfaces
    • DuraLife brake rotors feature a hardened surface to reduce corrosion and provide quieter braking with less vibration. DuraLife rotors are hardened and strengthened during the manufacturing process
    • Brake system features a corrosion-fighting process called Ferritic Nitro-Carburizing (FNC) which can double rotor life expectancy and reduce or minimize rust over non-FNC coated rotors
  • Integrated trailer brake controller
    • Integrated with the antilock brake system (ABS)
    • Helps provide measured brake force signaling to electric-controlled trailer brake systems
    • Trailer gain and output are displayed in the Driver Information Center
  • Four wheel drive
  • Heavy-duty 720 cold-cranking amps battery
    • 80 Amp-hr
    • Maintenance-free with rundown protection and retained accessory power
    • May require additional optional equipment
  • Automatic locking rear differential
    • When the differential senses a significant difference in wheel speed, it locks to turn both rear wheels in unison for added traction
    • The Eaton® Locker senses a difference in wheel speed of approximately 100 rpm
  • Dual, 220 amp and 170 amp each alternators
    • May require additional optional equipment
  • 11,350 lbs. GVWR
    • When properly equipped; includes weight of vehicle, passengers, cargo and equipment
  • Emissions, Federal requirements
  • Gooseneck / 5th Wheel Prep Package
    • Hitch platform to accept Gooseneck or 5th wheel hitch
    • Hitch platform with tray to accept ball and stamped box holes with caps installed
    • Box mounted 7-pin trailer harness
    • May require additional optional equipment
  • X31 Off-Road Package
    • Off-Road suspension
    • Hill Descent Control
    • Skid plates
    • Twin-tube Rancho shocks
  • ProGrade Trailering System
    • Hitch Guidance with Hitch View1
    • In-vehicle Trailering App
  • Trailering Package
    • Trailer Hitch1
    • Trailering hitch platform
    • Includes a 2.5" receiver hitch (with 2" insert), 4-pin and 7-pin connectors
    • 7-wire electrical harness and 7-pin sealed connector for connecting your trailer's lights and brakes to your vehicle
    • May require additional optional equipment
  • Gooseneck / 5th Wheel Package
    • Gooseneck / 5th Wheel Prep Package
      • Hitch platform to accept Gooseneck or Fifth-wheel hitch
      • Hitch platform with tray to accept ball and stamped bed holes with caps installed
      • Bed mounted 7-pin trailer harness
    • Sierra includes trailer brake controller
    • Sierra, SLE and SLT includes Spray-on bed liner
    • SLT, AT4 and Denali includes Bed View Camera1
    • May require additional optional equipment
  • AT4 Preferred Equipment Group includes standard equipment
  • Heavy Duty Front Spring / Camper Package
  • Trailering Information Label
    • Provides max trailer ratings for tongue weight, conventional, gooseneck hitch and 5th wheel hitch
  • LED Daytime Running Lamps
    • Daytime Running Lamps automatically illuminate signature lighting
  • Hitch Guidance
    • Displays a guideline on the Rear Vision Camera view when you're in Reverse to help line up your hitch to your trailer1
    • When driving, Hitch Guidance allows you to briefly check your trailer using the Rear Vision Camera view
  • Tire Pressure Monitoring System
    • Monitors the pressure in each tire and alerts you if there is a low-pressure condition in one or more of the tires1
    • Includes Tire Fill Alert1
  • 6 airbags
    • Dual-stage frontal airbags for driver and front outboard passenger1
    • Seat-mounted side-impact airbags for driver and front outboard passenger1
    • Head-curtain airbags for outboard seating positions1
    • Includes front outboard Passenger Sensing System for frontal outboard passenger airbag and illuminates a status light that indicates whether the airbag is on or off1
  • Hitch Guidance with Hitch View
    • Displays a guideline on the Rear Vision Camera view when you're in Reverse to help line up your hitch to your trailer and offers a close-up Hitch View1
    • When driving, Hitch Guidance with Hitch View allows you to briefly check your trailer connection using the Rear Vision Camera view
    • When Hitch View is in use, automatically applies electric parking brake when shifting to Park
    • May require additional optional equipment
  • OnStar® & GMC Connected Services capable
    • Terms and limitations apply. See onstar.com or dealer for details.
  • Teen Driver
    • This configurable feature lets you activate customizable vehicle settings associated with a key fob to help encourage better driving behavior
    • It can limit certain vehicle features, and automatically turns on certain safety systems if vehicle is equipped
    • An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
  • Bed View Camera
    • Camera in the Center High Mount Stop Lamp (CHMSL) provides an elevated view of the truck bed from the back of the cab1
    • Allows driver to see inside the cargo bed on the infotainment display to help with 5th wheel or gooseneck hitching and to check cargo
    • Includes 2 Trailer Camera Provisions
    • May require additional optional equipment
  • 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: 401
  • Rear Wheel
    • Rear Wheel: Single
  • Trailering Capacity
    • Trailering Capacity: 14500 lbs
Vehicles You Might Like
  • $26,980 Huston Price


  • $35,484 Huston Price


  • $36,594 Huston Price


  • $38,410 Huston Price


Although every effort is made to ensure all information shown is accurate, dealer is not liable for any inaccuracies, omissions, system errors and/or typographical errors. There may be some instances where pricing, options, or features may be listed incorrectly as we get data from multiple external sources. Please contact the dealership for the most up-to-date pricing, incentive information, and availability. Prices are plus tax, tag, title, license, registration, other fees required by law, $899 pre-delivery service charge which represents costs and profit to the dealer for items such as inspecting, leaning, and adjusting vehicles, and preparing documents related to the sale, $99 private agency fee, and $149 electronic filing fee. Pricing, specifications, and incentives may change at any time, without notice. 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 EPAs website for details, including a MPG recalculation tool). New vehicles: Pricing includes incentives and rebates assigned to dealer. You may personally qualify for even more incentives or rebates not listed. Cash offers/rebates may not be available with special finance, lease and some other offers. Lease offers may not be available with special finance or some other offers; must qualify and lease through GM Financial. "Loaner" / Courtesy Vehicles: Courtesy Transportation Vehicles are driven by customers as service loaners. Some vehicles listed on the website are still active loaners and may not be available for immediate delivery. Once available for sale, CTA units will have between 2,000-7000 accrued miles. They have been maintained by our service team and are offered with the remainder of their factory warranty, all available rebates, and special CTA discounts. Used/Certified Pre-Owned Vehicles: Used vehicles may be subject to unrepaired manufacturer recalls. Please check the National Highway Safety Administration website (https://vinrcl.safercar.gov/vin/) for current recall information and contact the dealer for assistance or questions before purchasing.

The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.

Cookie Consent: By continuing to use this site you agree to our use of cookies.

Accept Learn More