This 2026 GMC Sierra 2500HD AT4 represents a premium heavy-duty truck built for serious work and commanding presence on any terrain.
- Duramax 6.6L V8 Turbodiesel with 10-Speed Automatic and 4WD
- AT4 Preferred Package with X31 Off-Road Package
- Gooseneck/5th Wheel Prep Package for heavy towing applications
- Bose Premium 7-Speaker Sound System with SiriusXM 360L Trial Subscription
- HD Surround Vision and Bed View Camera with Trailer Camera Provisions
- 2-Speed Active Transfer Case with Hill Descent Control and Off-Road Suspension
- Wireless Phone Projection and Apple CarPlay/Android Auto
- Heated and Ventilated Front Seats with 10-Way Power Adjusters
- Heated Rear Outboard Seats and Heated Steering Wheel
- Spray-on Pickup Bedliner with GMC Logo
- 20" High Gloss Black 8-Spoke Aluminum Wheels
- Remote Vehicle Starter System and Keyless Open and Start
- Ultrasonic Front and Rear Park Assist with Rear Cross Traffic Alert
- LED Cargo Area Lighting and LED Smoked Amber Roof Marker Lamps
- Multiple USB Charging Ports and 120-Volt Power Outlets
The AT4 distinction means this truck comes equipped with specialized off-road capability through its X31 Off-Road Package, which includes an off-road-tuned suspension, 2-Speed Active Transfer Case, and Hill Descent Control. These features work together to provide confidence on challenging terrain while maintaining the comfort and refinement expected in a premium cab.
The Duramax diesel engine paired with the 10-Speed Automatic transmission delivers the power needed for demanding work applications. The Gooseneck/5th Wheel Prep Package indicates this truck is ready for serious towing operations, with dedicated provisions built into the frame and bed for maximum capability and safety.
Inside the cab, you'll find serious comfort and technology. The Bose audio system combined with SiriusXM keeps you connected during long drives, while the heated and ventilated front seats, along with heated rear outboard seats and steering wheel, provide comfort in any season. The wireless charging pad and multiple USB ports ensure your devices stay powered, and wireless phone projection keeps navigation and communication seamless.
The truck features comprehensive camera systems including the Bed View Camera and Trailer Camera Provisions with Trailer Viewing Software, making maneuvering and hitching substantially easier. Ultrasonic Park Assist combined with Rear Cross Traffic Alert and Trailer Side Blind Zone Alert provides confidence during precise movements.
The Black exterior with 20" High Gloss Black aluminum wheels conveys the rugged sophistication of the AT4 line. The spray-on bedliner with GMC Logo protects your investment while the LED lighting package modernizes the overall appearance.
With fresh oil change completed and ready for delivery, this Sierra 2500HD AT4 awaits a buyer who demands both capability and premium comfort in a heavy-duty truck.
Used 2026 GMCSierra 2500HD Truck Crew Cab AT4
- Diesel
- Exterior Color
- Onyx Black
- Interior Color
- Jet Black
- Odometer
- 11,560 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Seats
- 5 seats
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- V-8 cyl
- VIN
- 1GT1UPEY1TF114820
- Stock Number
- DP2369
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
- Engine: Duramax 6.6L Turbo-Diesel V8
- Capped Fuel Fill
- 220-Amp Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- GVWR: 11,350 lbs
- 3.42 Axle Ratio
- Transmission: 10-Speed Automatic
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
- Block heater
- Compressor: intercooled turbo
- Cylinder configuration: V-8
- Drive type: four-wheel
- Electric motor 1 torque: none
- Electric motor horsepower: none
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Horsepower: 470hp @ 2,800RPM
- Hybrid electric powertrain type: none
- Hybrid system combined power torque: none
- Hybrid system net power: none
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 32
- Rear locking differential
- Recommended fuel: Diesel
- Standard fuel economy fuel type: diesel
- Torque: 975 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 257mm (10.1")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Heated door mirrors
- 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
- Compression ratio: 16.00 to 1
- Curb weight: 3,661kg (8,071lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine torque: 975 lb.-ft. @ 1,600RPM
- 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")
- Payload: 1,467kg (3,235lbs)
- 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")
- Towing capacity: 8,391kg (18,500lbs)
- 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
Standard Features
- Capped Fuel Fill
- 220-Amp Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- GVWR: 11,350 lbs
- 3.42 Axle Ratio
- Transmission: 10-Speed Automatic
Dealer Notes
KBB.com Consumer Reviews
*The advertised price does not include sales tax, vehicle registration fees, finance charges, and any other fees required by law. Price INCLDUES $490 PA documentation fee. We attempt to update this inventory on a regular basis. However, there can be lag time between the sale of a vehicle and the update of the inventory. Although every reasonable effort has been made to ensure the accuracy of the information contained on this site, absolute accuracy cannot be guaranteed. This site, and all information and materials appearing on it, are presented to the user "as is" without warranty of any kind, either express or implied. All vehicles are subject to prior sale.
