New 2026 GMCSierra 2500 HD AT4X
- Diesel
- Exterior Color
- Summit White
- Interior Color
- Obsidian Rush, Full Grain Leather seat trim
- Body/Seating
- Truck/5 seats
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- 6.6L Duramax Turbo-Diesel V8 engine
- VIN
- 1GT4UZEY9TF299773
- Stock Number
- TF299773
Highlighted Features
- 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
Included Packages & Accessories
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
- 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
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 13.4"
- Satellite radio trial duration with new vehicle purchase (months): 3
- 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
- Basic warranty: 36 months/36,000miles
- Corrosion perforation warranty: 72 months/100,000miles
- Diesel engine warranty: 60 months/100,000miles
- Maintenance warranty: 12 months/ unlimited distance
- Powertrain warranty: 60 months/60,000miles
- Roadside assistance coverage: 60 months/60,000miles
- 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
- 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
- Approach angle: 32 deg
- Departure angle: 26 deg
- Ground clearance (min): 295mm (11.6")
- Ramp breakover angle: 21 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
- Compression ratio: 16.00 to 1
- Curb weight: 3,717kg (8,195lbs)
- 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: 2,100mm (82.7")
- Exterior length: 6,369mm (250.8")
- 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")
- GVWR: 5,148kg (11,350lbs)
- Payload: 1,411kg (3,111lbs)
- 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: 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
- Tracker system: Stolen Vehicle Assistance
- Traction control
Dealer Notes
ALL VEHICLES SUBJECT TO A $225 DEALER DOC FEE. NEW VEHICLES PRE-LOADED WITH OUR VIP PACKAGE FOR $2995. THIS INCLUDES 1 YEAR OIL CHANGES AND TIRE ROTATIONS. ONE YEAR INTERIOR AND EXTERIOR PROTECTION. WINDOW TINT, ALL-WEATHER FLOOR MATS, AND WHEEL LOCKS. 1 YEAR THEFT PROTECTION. LIFETIME POWERTRAIN WARRANTY* SOME EXCLUSIONS APPLY TO THE LIFETIME WARRANTY- Engine Block Heater- Alternator, 220 AMP- 6.6L V8 Diesel Turbocharged (Duramax) (B20-Diesel Compatible) (Includes (K05) Engine Block Heater) (470 hp [350.5 kW] @ 2800 rpm, 975 lb-ft of torque [1322 Nm] @ 1600 rpm)- LPO, HITCH PACKAGE- Gooseneck/5th Wheel Prep Package- Hitch Package- Preferred Equipment Group 4SG- Bose Premium Series 12-Speaker System- SiriusXM with 360L Trial Subscription- Steering Wheel Audio Controls- Electric Rear-Window Defogger- 120-Volt Bed Mounted Power Outlet- 120-Volt Instrument Panel Power Outlet- Push Button Start- Remote Vehicle Starter System- Universal Home Remote- Manual Tilt-Wheel/Telescoping Steering Column- 2-Speed Active Transfer Case- Gloss Black Header Grille and Grille Insert Bars- LED Cargo Area Lighting- LED Smoked Amber Roof Marker Lamps- Rear Wheelhouse Liners- Spray-on Pickup Bedliner with GMC Logo- 2 Charge-Only Rear USB Ports- 2 Charge/Data USB Ports Inside Center Console- 2 USB Ports- Bed View Camera with Two Trailer Camera Provisions- Floor-Mounted Center Console- Front Premium Floor Liners with Removable Carpet Insert- HD Surround Vision- Inside Rearview Auo-Dimming Rear Camera Mirror- Multicolor 15 Diagonal Head-Up Display- OnStar Services Capable- Rear Cross Traffic Alert- Rear Premium Floor Liners with Removable Carpet Insert- Trailer Cam Provisions and Trailer Viewing Software- Trailer Side Blind Zone Alert- Ultrasonic Front and Rear Park Assist- Wireless Charging- Wireless Phone Projection- Hill Descent Control- Keyless Open and Start- Heated 2nd Row Outboard Seats- Heated Driver and Front Outboard Passenger Seats- Safety Alert Seat- Ventilated Driver and Front Passenger Seats- Unauthorized Entry Theft-Deterrent System- Power Sunroof- Trailer Tire Pressure Monitor Sensors- Deep-Tinted Glass- Front Rain-Sensing Wipers- Power Front Passenger Windows with Express Up/Down- Power Sliding Rear Window with DefoggerThis 2026 GMC Sierra 2500HD AT4X is equipped with an impressive array of premium features and capabilities that make it an exceptional choice for those seeking a capable and well-appointed heavy-duty truck. The Duramax 6.6L V8 Turbodiesel engine delivers exceptional power and torque, while the 10-speed automatic transmission and 4WD system ensure confident performance in a variety of driving conditions. The AT4X trim level adds a host of off-road-focused enhancements, including the Gooseneck/5th Wheel Prep Package and Hitch Package, making this Sierra an ideal companion for towing, hauling, and adventuring.Inside, the Sierra 2500HD AT4X pampers occupants with luxurious touches, such as the Bose Premium Series 12-speaker audio system, heated and ventilated front seats, and a multicolor 15-inch head-up display. Advanced technology features, including wireless charging, wireless phone projection, and the HD Surround Vision camera system, provide convenience and enhanced situational awareness. The Preferred Equipment Group 4SG further elevates the Sierra's capabilities and amenities, ensuring a truly premium driving experience.Whether you're tackling tough jobs, towing heavy loads, or embarking on off-road expeditions, this 2026 GMC Sierra 2500HD AT4X is ready to rise to the occasion. Experience the uncompromising power, capability, and refinement that make this heavy-duty truck a standout in its class. Visit our dealership today to take this exceptional Sierra for a test drive and discove
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