Used 2026 GMCSierra 2500 HD AT4

  • Diesel

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    Exterior Color
    Sterling
    Interior Color
    Jet Black
    Odometer
    3,849 miles
    Body/Seating
    Truck Crew Cab/5 seats
    Transmission
    10 speed automatic
    Drivetrain
    4x4
    Engine
    V-8 cyl
    VIN
    1GT4UPEY4TF126229
    Stock Number
    T29087A
    GMC Sierra 2500 HD
    • Show Me the CARFAX 1-Owner Badge

    Highlighted Features

    • Lane departure
    • Leather upholstery
    • Automatic temperature control
    • Emergency communication system
    • 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

    Included Packages & Accessories

    • AT4 Premium Plus Package: Power Sunroof; Technology Package; Power-Retractable Black Assist Steps
    • Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners
    • AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote
    • Power-Retractable Black Assist Steps
    • Technology Package
    • Power Sunroof
    • Gooseneck/5th Wheel Prep Package
    • Sterling Metallic
    • LED Smoked Amber Roof Marker Lamps
    • Apple CarPlay/Android Auto smart device wireless mirroring
    • Forward Collision Alert with Automatic Braking
    • Front Pedestrian Braking
    • Wi-Fi Hotspot capable mobile hotspot internet access
    • HD Rear Vision Camera w/Hitch View rear mounted camera
    • Adaptive cruise control
    • Head-up display
    • Automatic Emergency Braking predictive brake assist system
    • Cruise control with steering wheel mounted controls
    • Ventilated driver and front passenger seats
    • Keyfob remote start
    • Heated steering wheel
    • Heated driver and front passenger seats
    • Heated rear seats
    • Leather front seat upholstery
    • Primary monitor touchscreen
    • Lane Departure Warning
    • Rear Cross-Traffic Alert collision warning
    • First-row sliding and tilting glass sunroof with express open/close activation sunshade
    • Driver seat power reclining
    • lumbar support
    • cushion tilt
    • fore/aft control and height adjustable control
    • AutoTrac part and full-time 4WD
    • Duramax 6.6L V-8 diesel direct injection
    • intercooled turbo
    • diesel
    • engine with 470HP
    • Duramax 6.6L V-8
    • Front wireless smart device charging
    • Google Built-In built-in virtual assistant
    • Teen Driver restricted driving mode/alerts
    • Keyless Open/Keyless Start with hands-free access and push button start
    • Keyfob window control
    • HD Surround Vision w/Hitch View aerial view camera
    • Smart device remote start
    • Push-button
    • GCW Alert weight capacity alert
    • Video-feed rearview mirror
    • Stolen Vehicle Assistance vehicle tracker with vehicle slowdown
    • Bluetooth wireless audio streaming
    • Hitch Guidance vehicle to trailer hitching assist
    • Gauge cluster display size: 12.30
    • Front mounted camera with washer
    • Right side camera
    • Pickup box camera
    • Left side camera
    • Trailer Side Blind Zone Alert blind spot warning
    • Following Distance Indicator
    • Trailer light test
    • Trailer light malfunction warning
    • Trailer theft alarm
    • Dual-zone front climate control
    • Full gauge cluster screen
    • Auto high-beam headlights
    • Immobilizer
    • V8; Turbo Diesel; 6.6 Liter
    • Automatic; 10-Spd Allison
    • 4WD
    • Sierra HD Pro Safety
    • Side Blind Zone Alert
    • X31 Off-Road Pkg
    • Hill Descent Control
    • Hill Start Assist
    • Traction Control
    • StabiliTrak
    • ABS (4-Wheel)
    • Theft Deterrent System
    • Keyless Entry
    • Push Button Start
    • Air Conditioning
    • Power Windows
    • Power Door Locks
    • Adaptive Cruise Control
    • Power Tailgate Release
    • Power Steering
    • Tilt & Telescoping Wheel
    • AM/FM Stereo
    • SiriusXM Satellite
    • Navigation System
    • Bluetooth Wireless
    • OnStar
    • Premium GMC Infotainment System
    • F&R Park Assist
    • Backup Camera
    • Surround View Camera
    • Dual Air Bags
    • Side Air Bags
    • F&R Head Curtain Air Bags
    • Forward Collision Alert
    • Lane Departure Warning System
    • Heated & Ventilated Seats
    • Dual Power Seats
    • Leather
    • Daytime Running Lights
    • LED Headlamps
    • Fog Lights
    • Bed Liner
    • Towing Pkg
    • Premium Wheels

    Detailed Specifications

    • 1-touch down
    • 1-touch up
    • Adaptive Cruise Control
    • Air conditioning
    • Auto-dimming rearview mirror
    • Automatic temperature control
    • Driver door bin
    • Driver vanity mirror
    • Emergency communication system: OnStar
    • Front beverage holders
    • Front dual zone A/C
    • Heated steering wheel
    • Illuminated entry
    • Memory seat
    • 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
    • Remote keyless entry
    • Speed control
    • Surround View Monitor: HD Surround Vision w/Hitch View yes
    • 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
    • Premium audio system: Premium GMC Infotainment System
    • Primary LCD size: 13.4"
    • Smart device integration: Apple CarPlay/Android Auto
    • Speaker type: Bose
    • Speakers: 7
    • Steering wheel mounted audio controls
    • Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
    • Wireless Phone Charger: front
    • 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
    • Cylinder configuration: V-8
    • Drive type: four-wheel
    • Engine liters: 6.6L
    • Engine location: front
    • Fuel tank capacity: 36.0gal.
    • Hybrid traction battery type: none
    • Manual-shift auto
    • Mode select transmission
    • Rear locking differential
    • Transmission: 10 speed automatic
    • Variable valve control
    • Ground clearance (min): 257mm (10.1")
    • Auto-dimming door mirrors
    • Bedliner
    • Bumpers: body-color
    • Heated door mirrors
    • Hitch Class: IV
    • Left rear passenger door: conventional
    • Power door mirrors
    • Rear cargo: tailgate
    • Rear step bumper
    • Right rear passenger: conventional
    • Skid plates
    • Trailer hitch
    • Trailer sway control
    • Turn signal indicator mirrors
    • Engine displacement: 6.6 L
    • Exterior body width: 2,079mm (81.8")
    • Exterior height: 2,027mm (79.8")
    • Exterior length: 6,369mm (250.8")
    • Front hiproom: 1,554mm (61.2")
    • Front legroom: 1,131mm (44.5")
    • Front shoulder room: 1,677mm (66.0")
    • Rear headroom: 1,019mm (40.1")
    • 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: 4,039mm (159.0")
    • Appearance: digital/analog
    • Auto high-beam headlights
    • Blind spot: Trailer Side Blind Zone Alert warning
    • Compass
    • Configurable
    • Delay-off headlights
    • Exterior parking camera cargo
    • Exterior parking camera front
    • Exterior parking camera left
    • Exterior parking camera rear: HD Rear Vision Camera w/Hitch View yes
    • Exterior parking camera right
    • Front fog lights
    • Front reading lights
    • Fully automatic headlights
    • Lane departure: Lane Departure Warning warning
    • Low tire pressure warning
    • Oil pressure gauge
    • Outside temperature display
    • Parking sensors: UltraSonic front and rear
    • Rain sensing wipers
    • 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
    • Forward collision: Forward Collision Alert with Automatic Braking mitigation
    • Front pedestrian detection: prevention
    • 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

    Vehicle Details
    2026 GMC Sierra 2500 AT4 - 4WD, V8 6.6L Diesel, 3,849 miles - Atlanta, GA

    This 2026 GMC Sierra 2500 AT4 blends rugged capability with refined technology, now available with exceptionally low mileage. Powered by a stout 6.6L V8 diesel and equipped with four-wheel drive, this heavy-duty GMC Sierra is built for towing, hauling and confident off-road performance while delivering a composed on-road ride. The AT4 trim adds an aggressive stance, specialized suspension tuning and durable exterior accents for a purpose-driven look.

    Well-appointed inside, the cabin includes Android Auto integration and XM Radio for seamless connectivity and entertainment on every drive. Steering wheel audio controls keep media and phone access within easy reach, while adaptive cruise control enhances long-distance comfort and safety by automatically managing speed and following distance.

    This truck's CARFAX 1-Owner history underscores careful stewardship and straightforward ownership records - a reassuring detail for buyers seeking a late-model, low-mileage heavy-duty pickup. The GMC Sierra's combination of a powerful diesel V8, advanced driver aids and premium AT4 features makes it a compelling option for professionals and enthusiasts who need a capable workhorse that also offers modern conveniences.

    Located in Atlanta, GA, this GMC Sierra 2500 AT4 is ready for immediate inspection and test drive. Contact us to schedule your appointment and experience this low-mileage diesel pickup firsthand.

    Equipment
    This 3/4 ton pickup is pure luxury with a heated steering wheel. The steering wheel audio controls on this GMC Sierra keep the volume and station within easy reach. The leather seats in this model are a must for buyers looking for comfort, durability, and style. Bluetooth technology is built into it, keeping your hands on the steering wheel and your focus on the road. Good News! This certified CARFAX 1-owner vehicle has only had one owner before you. Our dealership has already run the CARFAX report and it is clean. A clean CARFAX is a great asset for resale value in the future. Apple CarPlay: Seamless smartphone integration for this GMC Sierra - stay connected and entertained on the go! This GMC Sierra warns of approaching vehicles with Cross-Traffic Alert. This GMC Sierra is equipped with the latest generation of XM/Sirius Radio. Engulf yourself with the crystal clear sound of a BOSE sound system in this GMC Sierra.The spacious cab of this three-quarter ton offers many convenience and technology options. It is also ready for your burliest jobs. When you encounter slick or muddy roads, you can engage the four wheel drive on this GMC Sierra and drive with confidence. Anti-lock brakes are standard on the vehicle. This 2026 GMC Sierra 2500 has auto-adjust speed for safe following. This 2026 GMC Sierra 2500 offers Android Auto for seamless smartphone integration. This unit offers Apple CarPlay for seamless connectivity. This model has an automatic transmission. This model features a high end BOSE stereo system. Protect this model from unwanted accidents with a cutting edge backup camera system. It has a durable long lasting bed liner. Good News! This certified CARFAX 1-owner vehicle has only had one owner before you. Our dealership has already run the CARFAX report and it is clean. A clean CARFAX is a great asset for resale value in the future. Maintaining a stable interior temperature in this 2026 GMC Sierra 2500 is easy with the climate control system. This 2026 GMC Sierra 2500 warns of approaching vehicles with Cross-Traffic Alert. Easily set your speed in this GMC Sierra with a state of the art cruise control system. Increase or decrease velocity with the touch of a button. This vehicle has a diesel engine. The GMC Sierra has a V8, 6.6L high output engine. Front and rear side curtain airbags are included on this GMC Sierra. This 3/4 ton pickup has fog lights for all weather conditions. It has front air bags that will protect you and your passenger in the event of an accident. This 2026 GMC Sierra 2500 is equipped with front side curtain airbags. This 3/4 ton pickup emanates grace with its stylish gray exterior. The vehicle features a hands-free Bluetooth phone system. This vehicle is pure luxury with a heated steering wheel. With the keyless entry system on this GMC Sierra you can pop the trunk without dropping your bags from the store. This 3/4 ton pickup's Lane Departure Warning keeps you safe by alerting you when you drift from your lane. The leather seats in it are a must for buyers looking for comfort, durability, and style. With the adjustable lumbar support in this vehicle your back will love you. You'll never again be lost in a crowded city or a country region with the navigation system on this GMC Sierra. An off-road package is installed on this 2026 GMC Sierra 2500 so you are ready for your four-wheeling best. The vehicle is outfitted with an OnStar communication system. This 2026 GMC Sierra 2500 comes with power adjustable seat to get your seat just right for you. Power seats are a must! Nothing dresses up a vehicle better than a set of high end premium wheels. Never get into a cold vehicle again with the remote start feature on this 3/4 ton pickup. It has satellite radio capabilities. The steering wheel audio controls on the vehicle keep the volume and station within easy reach. This unit is built for driving comfort with a telescoping wheel. The traction control system on this 3/4 ton pickup instantly senses tire slippage and executes minute power adjustments to maintain traction at all speeds. The vehicle is equipped with the latest generation of XM/Sirius Radio.

    Packages
    AT4 Premium Plus Package: Power Sunroof; Technology Package; Power-Retractable Black Assist Steps. Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners. AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote. Power-Retractable Black Assist Steps. Technology Package. Power Sunroof. Gooseneck/5th Wheel Prep Package. Sterling Metallic. LED Smoked Amber Roof Marker Lamps. **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**AT4 Premium Plus Package: Power Sunroof; Technology Package; Power-Retractable Black Assist Steps Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote Power-Retractable Black Assist Steps Technology Package Power Sunroof Gooseneck/5th Wheel Prep Package Sterling Metallic LED Smoked Amber Roof Marker Lamps **Equipment listed is based on original vehicle build and subject to change. Please confirm the accuracy of the included equipment by calling the dealer prior to purchase.**

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
    Overall0.0Out of 5
      While every effort has been made to ensure the accuracy of the information on this site, absolute accuracy cannot be guaranteed. This site and all information presented are provided "as is" without warranty of any kind, either express or implied. All vehicles are subject to prior sale. Prices do not include tax, a $350 tag and title fee, or a $689 dealer fee. Not responsible for typographical errors.

      **Estimated arrival times are for reference only and may change due to factors outside of Subaru’s or the retailer’s control.
      USED 2026 GMC Sierra 2500 HD Truck Crew Cab AT4

      Exterior Color: Sterling

      Interior Color: Jet Black

      Vin Number: 1GT4UPEY4TF126229

      Stock: T29087A

      View this 2026 GMC Sierra 2500 HD Truck Crew Cab AT4 for sale at Classic Subaru in Atlanta, GA.