This 2026 GMC Sierra 2500HD AT4X combines capability with refined comfort, delivering a truck engineered for those who demand both performance and premium features.
- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque
- 4WD with 2-Speed Active Transfer Case and Hill Descent Control
- Gooseneck/5th Wheel Prep Package for serious towing applications
- Black Badging Package with gloss black grille and black GMC emblems
- Bose Premium 12-Speaker Audio System with SiriusXM 360L Trial Subscription
- 15" Multicolor Head-Up Display with HD Surround Vision
- Premium GMC Infotainment System with Apple CarPlay and Android Auto
- Wireless Phone Projection and Wireless Charging
- Full Grain Leather Seat Trim with heated and ventilated front seats
- Heated 2nd Row Outboard Seats and Power Sunroof
- Spray-on Pickup Bedliner with GMC Logo and 120-Volt Bed Power Outlet
- Dual 220 and 170-Amp Alternators for robust electrical capacity
- Advanced safety suite including HD Surround Vision, Rear Cross Traffic Alert, and Trailer Side Blind Zone Alert
- In-Vehicle Trailering System App with Hitch Guidance and Trailer Viewing Software
- Engine Block Heater and 80-Amp Heavy-Duty Battery for reliability
The AT4X designation reflects this truck's off-road engineering, with an off-road suspension tuned for challenging terrain while maintaining composure on daily drives. The diesel powerplant delivers substantial torque at low RPMs, translating to responsive acceleration and genuine towing capability. Dual alternators ensure your electrical systems remain robust regardless of demand.
Inside, the cabin emphasizes quality through full grain leather appointments, heated and ventilated front seats, and a heated steering wheel that enhance driver comfort. The 15-inch head-up display keeps critical information visible without distraction, while the Bose audio system transforms your commute with clear, dynamic sound. Wireless charging and multiple USB ports integrate seamlessly with modern mobile devices.
Technology features support both work and lifestyle needs. The in-vehicle trailering system app, trailer tire pressure monitors, and hitch guidance simplify managing heavy loads. Automatic high-beam headlights, rain-sensing wipers, and emergency braking systems support confident driving in varied conditions. The power sunroof adds an open-air dimension to the driving experience.
The truck's capability is evident in intentional details: the spray-on bedliner protects your cargo area, the gooseneck/5th wheel prep package accommodates serious towing infrastructure, and the engine block heater ensures reliable starts in cold climates. Storage features throughout the cabinâ"including the floor-mounted center console and door binsâ"organize essentials within reach.
This Sierra 2500HD AT4X represents a complete package for buyers who refuse to compromise between capability and quality. With premium materials, advanced technology, and engineering designed for real-world demands, this truck is ready for whatever you require of it.
2026 GMC Sierra 2500 HD AT4X
- Used
- Diesel
Finance Terms
Mercedes-Benz of Escondido
Call 760-745-5982
We’re here to help
The overview
- Exterior Color
- Onyx Black
- Interior Color
- Obsidian Rush
- Odometer
- 1,390 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Seats
- 5 seats
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT4UZEYXTF263607
- Stock Number
- F263607T
The highlights
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Power moonroof
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
The full 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
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Moonroof sunshade: manual
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power moonroof
- 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 tires: 305/70RR18.0E
- Front wheel independent suspension
- Power steering
- Rear tires: 305/70RR18.0E
- Single rear wheels
- Speed-sensing steering
- Wheel size: 18"
- 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 Performance Series
- Speakers: 12
- 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 steering wheel
- Leather upholstery
- Max seating capacity: 5
- Power 4-way driver lumbar support
- Power 4-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
- Electric motor 1 torque: none
- Electric motor horsepower: none
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- 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
- Rear locking differential
- Transmission: 10 speed automatic
- Variable valve control
- Departure angle: 26 deg
- Auto-dimming door mirrors
- Bedliner
- 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: 2,100mm (82.7")
- Front headroom: 1,013mm (39.9")
- 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: 7.9m (25.9')
- 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
- Heads up display
- 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
Notes from the dealer
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KBB.com Consumer Reviews
Manufacturer's Suggested Retail Price (MSRP) is for comparison purposes only, excludes destination/delivery charge, taxes, title, license, registration, document preparation fee ($85), and dealer-installed options, accessories, or administrative fees. Dealer sets actual price. While we make every effort to ensure data accuracy, we are not responsible for typographical, pricing, or technical errors.
