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Used 2021 GMC Sierra 2500 HD AT4 Truck Photo 1 of 43

Used 2021 GMCSierra 2500 HD AT4

Located at
Kunes Chevrolet GMC of Elkhorn
    Exterior Color
    Summit White
    Interior Color
    Jet Black with Kalahari Accents, Perforated front
    Odometer
    125,986 miles
    Transmission
    Automatic
    Drivetrain
    4WD
    Engine
    6.6L Duramax Turbo-Diesel V8 engine
    VIN
    1GT49PEY8MF229477
    Stock Number
    06T3765A
    GMC Sierra 2500 HD
    • Show Me the CARFAX Great Value Badge

    Included Packages & Accessories

    Standard Specifications

    • Max seating capacity: 5
    • Fuel System: Direct Injection
    • Fuel tank capacity: 36 gal
    • Horsepower: 401
    • Towing capacity: 14500 lbs
    • 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 with Navigation:
      • Multi-touch display, AM/FM/SiriusXM1 (trial subscription), stereo and includes Navigation2
      • HD Radio capability
      • Bluetooth®3streaming audio for music and select phones
      • Apple CarPlay™ capability for compatible phones4
      • Android Auto™ capability for compatible phones5
      • Use, control and manage select smartphone apps through the Infotainment system
      • Voice-activated technology for phone
      • USB port(s)6 to play stored audio files through your vehicle's audio system
      • With greater memory
      • May require additional optional equipment
    • 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
    • Bose® Premium Sound System:
      • 7-speakers with Richbass® woofer
      • Bose® is renowned for expert sound engineering and high-quality audio and with premium speakers positioned throughout the cabin, you'll get rich, concert-like sound
      • May require additional optional equipment
    • HD Radio:
      • Provides consumers with additional channels known as HD2, HD3 and HD4
      • Transmits Program Service Data, such as song titles and artist information
    • 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
    • 18" LT275/70R18 all-terrain, blackwall spare tire:
      • May require additional optional equipment
    • 18" LT275/70R18E all-terrain, blackwall tires
    • 18" machined aluminum wheels with Dark Grey metallic accents
    • Black beltline moldings
    • Body-color door handles
    • Body-color front bumper
    • Body-color rear bumper
    • Cab-mounted cargo area lamps:
      • Activated by switch located on center switch bank
      • Illuminates the cargo bed area
    • Cargo bed LED lighting:
      • Provides light to find cargo in the bed
      • Rear pillar lamps
      • May require additional optional equipment
    • Cargo tie-downs:
      • 12-fixed rated at 500 lbs. per corner
    • 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
    • Deep-tinted glass:
      • Provides added protection from sun and glare
    • Front license plate bracket:
      • Front bracket is included if displaying a front license plate is required in your state
    • 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
    • High gloss Black mirror caps
    • IntelliBeam:
      • Automatically turns on and off your vehicle's high beam headlamps according to surrounding traffic conditions
      • The automatic high beams will stay on until a sensor detects an approaching vehicle's headlamps or preceding vehicle's taillamps
      • May require additional optional equipment
    • LED fog lamps:
      • Help minimize glare in adverse driving conditions
    • 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
    • LED signature tail lamps:
      • C-shaped LED taillamps with LED stop and reverse light
      • Brighter and lasts longer than traditional incandescent bulbs
    • 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
    • Power sunroof:
      • Opens over the first row at the push of a button
      • Retracts into the roof
      • Offers tilt and slide features with express-open and -close
      • May require additional optional equipment
    • 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
    • Smoked Amber LED roof marker lamps:
      • Roof-mounted lamps near the front of the cab
    • Spare tire carrier lock:
      • Helps keep spare tire secure
      • Utilizes the same key as the door and ignition
    • 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
    • Tailgate and bed rail protection caps
    • Tailgate with EZ Lift assist, power lock & release:
      • Hitch area lighting
      • May require additional optional equipment
    • Winter Grille Cover:
      • May require additional optional equipment
    • 10-way power driver seat with power lumbar:
      • Moves the seat forward and back, and up and down
      • Tilt the seat cushion and seatbacks
    • 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
    • 12-volt auxiliary front power outlet:
      • May require additional optional equipment
    • 12-volt auxiliary rear power outlet:
      • 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
    • 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
    • 8" diagonal, digital Driver Information Center:
      • Multiple page views may include fuel data, audio information, trailer settings, phone features, certain active safety features status (if equipped) and navigation1 route guidance
      • Includes driver personalization, warning messages and vehicle information
      • May require additional optional equipment
    • Assist handles:
      • Front A-pillar mounted for Driver and Passenger
      • Rear B-pillar mounted
    • Carpeted floor covering:
      • Color-keyed to match the interior
    • Compass:
      • Located in instrument cluster
    • 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
    • Driver memory:
      • Recalls 2 driver presets for 10-way power seat and outside mirrors
      • 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
    • Front bucket seats:
      • 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
    • GMC Connected Access capable:
      • Subject to terms. See onstar.com or dealer for details.
      • May require additional optional equipment
    • Head-Up Display:
      • Projects vehicle information onto the windshield low in the driver's line of sight to help you keep your eyes on the road
      • Multi-color 15" Diagonal Head-Up Display
      • Can select key vehicle information to display including an off-road inclinometer
      • Adjustable vertical position and brightness of the display
      • May require additional optional equipment
    • 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
    • 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
    • Instrumentation:
      • 6-gauge cluster
      • Speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
    • Keyless Open and Start:
      • With the Keyless Entry fob in your possession, conveniently locks and unlocks your car's doors without having to use the key fob
      • With the vehicle in Park or Neutral, press the brake pedal and then press the engine start/stop button to start the engine; the green indicator on the button will illuminate
      • Shift to Park and press the engine start/stop button to turn off the engine
      • May require additional optional equipment
    • Leather-wrapped steering wheel:
      • May require additional optional equipment
    • 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
    • Outside temperature display:
      • Located in infotainment display
    • 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)
    • Power sliding rear window with rear defogger:
      • Helps to keep your rear view clear of fog or frost
      • Utilizes a warming grid to remove fog or frost from the rear window
      • The window switch is conveniently located in the overhead console for easy 1-touch operation
      • 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
    • 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
    • Power windows with rear express-down:
      • May require additional optional equipment
    • Premium front floor liners with removable carpet insert
    • Premium rear floor liners with removable carpet insert
    • Rear Camera Mirror:
      • Uses a camera to provide you a wide and less obstructed view behind the vehicle while you're driving1
      • You can switch between the camera view and a traditional rear-view mirror
      • 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
    • Rear air vents:
      • Provides cabin comfort for rear occupants
    • 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
    • Remote Start:
      • Start your vehicle remotely and step into a comfortably warmed or cooled vehicle, depending on the weather and your preset preferences
      • Locks doors and turns on parking lamps while the engine is running
      • Activates the climate control system
    • 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
    • Steering-wheel mounted controls:
      • Allow the driver to easily operate the audio system and phone interface controls
      • 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
    • USB ports:
      • 2 located on instrument panel1
    • USB ports:
      • Second row includes 2 USB charging-only ports1
    • Universal Home Remote:
      • 3-channel programmable
      • Conveniently activates compatible devices such as garage door openers, security systems, and home automation devices from inside your vehicle
      • 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)
    • 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
    • Wireless Charging:
      • Uses induction technology for portable electronic devices1
      • Convenient charging location on the top of the center console
      • Device may require optional case for phones that are compatible
      • Customers can charge their smartphones while they drive without connecting to any cables
      • May require additional optional equipment
    • 11,350 lbs. GVWR:
      • When properly equipped; includes weight of vehicle, passengers, cargo and equipment
    • 3.42 rear axle ratio:
      • Requires a diesel engine
    • 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
    • 6.6L Duramax Turbo-Diesel V8 engine:
      • 445 hp [332 kW] @ 2800 rpm
      • 910 b-ft. of torque [1220 Nm] @ 1600 rpm
      • 3.42 rear axle ratio
      • Exhaust brake
      • Engine block heater
      • Capped fuel fill
      • Paired with an Allison® 10-speed automatic transmission
      • Diesel Exhaust Fluid (DEF) fill located in fuel door
      • Engine after run feature for cooling performance
      • May require additional optional equipment
    • Air filtration monitoring:
      • Alerts the driver when the engine air filter needs replacement
    • Allison® 10-speed automatic transmission:
      • Electronically controlled with overdrive for smooth-shifting performance
      • Tow/Haul mode that reduces shift cycling for better control and improved cooling when towing or hauling heavy loads
      • Auto Grade Braking that automatically downshifts when needed to enable engine braking, helping to slow the vehicle on downhill grades and reduce brake wear (operates in Tow/Haul mode)
      • 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
    • 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
    • Brake pad wear indicator
    • Capless fuel fill:
      • Prevents paint scratches that can result from a tethered fuel cap
      • Creates a tight seal around the fuel-pump nozzle when the nozzle is fully inserted
      • Requires gasoline engine
    • Diesel exhaust brake:
      • Reduces the amount of conventional braking needed while towing a heavy trailer or driving downhill
      • Uses the variable vanes in the turbocharger to smoothly and quietly create additional back pressure in the engine to help slow the vehicle
      • Works with the transmission's Tow/Haul mode and Auto Grade Braking to help the driver maintain the desired speed even on long, steep downgrades
      • Switch activated
      • 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
    • Engine block heater:
      • Helps ease cold weather starts
      • Heats the engine and engine block fluids
    • External auxiliary transmission oil cooler:
      • Heavy-duty air-to-oil cooler
      • Helps provides optimal transmission performance even when operating under a heavy load or towing a trailer
      • May require additional optional equipment
    • External engine oil cooler:
      • Heavy-duty air-to-oil cooler
      • Helps extend engine oil life under heavy loads
    • Fully boxed frame:
      • Hydroformed front section
      • High-strength steel
    • 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
    • Heavy-Duty Air Filter:
      • Thick construction helps to trap more dirt before it can enter the air intake
    • Heavy-duty 720 cold-cranking amps battery:
      • 80 Amp-hr
      • Maintenance-free with rundown protection and retained accessory power
      • May require additional optional equipment
    • 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
    • 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
    • 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
    • Off-Road suspension:
      • May require additional optional equipment
    • Pickup bed:
      • Roll-formed high-strength steel
    • Red vertical recovery hooks:
      • Two front frame-mounted1
    • Skid plates:
      • Help protect the front underbody, oil pan, differential case and transfer case
      • May require additional optional equipment
    • AT4 Preferred Package:
      • Wireless Charging1
      • Universal Home Remote
      • 8" diagonal Premium GMC Infotainment with Navigation2
      • Bose®3 Premium Sound System with Richbass® woofer
      • Rear sliding power window
      • LED roof marker lamps
      • Bed View Camera4
      • HD Surround Vision4 with Two Trailer View Camera Provisions
    • Driver Alert Package I:
      • Lane Change Alert with Side Blind Zone Alert1
      • Rear Cross Traffic Alert1
      • Front and Rear Park Assist1
      • Perimeter Lighting
      • May require additional optional equipment
    • Driver Alert Package II:
      • Lane Departure Warning1
      • Automatic Emergency Braking1
      • Forward Collision Alert1
      • Following Distance Indicator1
      • Safety Alert Seat1
      • IntelliBeam®
      • 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
    • ProGrade Trailering System:
      • Hitch Guidance with Hitch View1
      • In-vehicle Trailering App
    • Technology Package:
      • Rear Camera Mirror1
      • Multi-color 15" Diagonal Head-Up Display1
      • 8" diagonal Digital Driver Information Center on AT4 (Standard on Denali)
      • May require additional optional equipment
    • 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
    • X31 Off-Road Package:
      • Off-Road suspension
      • Hill Descent Control
      • Skid plates
      • Twin-tube Rancho shocks
    • 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
    • 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
    • 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
    • Following Distance Indicator:
      • Displays the gap time in seconds between your vehicle and a detected vehicle you're following1
      • This can help you decide if you're following much too closely
      • May require additional optional equipment
    • Forward Collision Alert:
      • Can warn you if it detects a potential front-end collision with a vehicle you're following so you can quickly take action1
      • It can also provide a tailgating alert if you're following a vehicle much too closely
      • May require additional optional equipment
    • Front and Rear Park Assist:
      • Can provide distance alerts to nearby detected objects in front of or behind your vehicle to help you park and avoid collisions at low speeds1
      • May require additional optional equipment
    • HD Surround Vision:
      • Uses multiple cameras to display a digital overhead image of the area around your vehicle along with Rear Vision Camera or front views1
      • It works at low speeds and may help you park and avoid nearby objects
      • You can select additional views on your camera display
      • Includes 2 Trailer Camera Provisions
      • Requires Auxiliary Trailer Camera if one of the following camera views is desired: Transparent Trailer2, Rear Trailer View, Picture-in-Picture or Inside Trailer View
      • May require additional optional equipment
    • 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
    • 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
    • Lane Change Alert with Side Blind Zone Alert:
      • Can provide side-mirror visual alerts when a detected moving vehicle is quickly approaching or is in your side blind zone1
      • It can help you avoid lane change collisions
      • May require additional optional equipment
    • Lane Departure Warning:
      • Can alert you if you might be unintentionally drifting out of detected lane lines so you can quickly take action1
      • It will not alert you if you're using your turn signal or it detects you may be intentionally leaving your lane
      • May require additional optional equipment
    • OnStar® & GMC Connected Services capable:
      • Terms and limitations apply. See onstar.com or dealer for details.
    • Rear Cross Traffic Alert:
      • Can warn you of detected left or right cross traffic behind your vehicle when you're in Reverse1
      • May require additional optional equipment
    • Safety Alert Seat:
      • Uses left, right, or both-side seat vibration pulses to help you identify the direction of potential crashes so you can quickly take action1
      • You can also switch to beeping crash avoidance alerts
      • May require additional optional equipment
    • 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
    • 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
    • Trailer Tire Pressure and Temperature Sensors:
      • Set of 4 sensors
      • Sensors will be shipped loose with the truck and will need to be installed on trailer by customer
      • Additional or replacement sensors are available as GM Accessory
      • System is capable of monitoring up to 6 wheels
      • May require additional optional equipment
    • Automatic Emergency Braking:
      • Works with Forward Collision Alert to help you avoid or reduce the severity of a front-end collision with a detected vehicle you're following1
      • Camera technology is used to automatically provide hard emergency braking or enhance the driver's hard braking
      • This feature works at speeds below 50 mph
      • May require additional optional equipment
    • StabiliTrak, electronic stability control system with traction control:
      • Automatically helps enhance control, particularly during emergency maneuvers, by adjusting the brakes and engine torque to help you stay on your intended path
      • Activates when vehicle sensors detect a difference between the driver's intended path and the direction the vehicle is actually travelling
      • Includes Traction Control that detects wheel slippage and applies brake pressure and/or reduces engine power to help the driver maintain control when accelerating on wet or snow-covered roads
      • Includes Brake Assist which detects rapid brake pedal applications due to emergency braking situations and provides additional braking via the Antilock Brake System (ABS) module
      • Includes Trailer Sway Control
      • Hill Start Assist

    Dealer Notes

    2021 GMC Sierra 2500HD AT4 Summit White 4WD Duramax 6.6L V8 TurbodieselRecent Arrival! AT4 Preferred Package: premium audio, navigation, wireless charging, auxiliary audio input, Bluetooth, MP3, universal garage door opener Technology Package: heads-up display, surround vision, backup camera Sun/Moonroof Blind spot monitor, cross-traffic alert, rear parking sensors Heated front and rear seats Heated steering wheel Running boards Tow package: gooseneck/5th wheel, hitch guidance, trailering app, heavy-duty trailer brake controller 6.6L V8 turbo diesel engine, 10-speed automatic, four-wheel drive Lane departure warning, front collision alert, automatic highbeams WiFi hotspot Keyless entry with remote start Climate control, multi-zone auto air conditioning Power folding and heated mirrors with turn signal Driver memory settings, power driver and passenger seats with adjustable lumbar Rear defrost, auto-dimming rearview mirror Bedliner, fog lamps, privacy glass, daytime running lights Stability control, traction control, full airbag suite, safety alert seat 11,350 lb GVWR HD radio Locking/limited slip rear differential

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
    Overall3.8Out 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…

    • 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!…

    • Don't judge a truck by the appearance

      By jmil on Wednesday, May 11, 2022

      3.0
      Great truck, loved it until the DEF tank heater malfunctioned and shut down the truck. Now sitting waiting for the replacement tank for over 10 weeks. Turns out every HD truck 2020 and 2021 has the same problem and all will need this replacement that is being produced at a snail's pace by GM. Per the dealership, last count, over 9000 trucks like mine are idle waiting for this part. $65000 waste of money and terrible service by GMC (not the local dealership).…
    Based on 13 consumer ratings for 2020–2025 models.Privacy

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    Kunes Price
    $46,158
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