2026 GMC SIERRA 2500HD AT4
Popular Features
Vehicle Description
Onyx Black 2026 GMC Sierra 2500HD AT4 4WD 10-Speed Automatic 6.6L V8 10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather, 10-Way Power Driver Seat Adjuster with Lumbar, 10-Way Power Passenger Seat Adjuster with Lumbar, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 Charge-Only Rear USB Ports, 2 Charge/Data USB Ports Inside Center Console, 2 USB Ports, 2-Speed Active Transfer Case, 220-Amp Alternator, 3.73 Rear Axle Ratio, 4-Wheel Disc Brakes, 7 Speakers, ABS brakes, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM with 360L, Apple CarPlay/Android Auto, AT4 Preferred Package, AT4 Premium Plus Package, Auto High-beam Headlights, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Automatic Emergency Braking, Automatic temperature control, Bed View Camera with Two Trailer Camera Provisions, Black Front and Rear Molded Splash Guards, Bose Premium 7-Speaker Sound System, Brake assist, Buckle to Drive, Bumpers: body-color, Compass, Deep-Tinted Glass, Delay-off headlights, Driver door bin, Driver Memory, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electric Rear-Window Defogger, Electronic Stability Control, Emergency communication system: OnStar, Floor-Mounted Center Console, Following Distance Indicator, Forward Collision Alert, Front anti-roll bar, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front License Plate Kit, Front Pedestrian Braking, Front Premium Floor Liners with Removable Carpet Insert, Front Rain-Sensing Wipers, Front reading lights, Front wheel independent suspension, Fully automatic headlights, Gloss Black Header Grille and Grille Insert Bars, Gooseneck/5th Wheel Prep Package, HD Surround Vision, Heated 2nd Row Outboard Seats, Heated door mirrors, Heated Driver and Front Outboard Passenger Seats, Heated front seats, Heated rear seats, Heated steering wheel, Heavy-Duty 80 Amp Battery, Hill Descent Control, Hitch Guidance with Hitch View, Illuminated entry, in-Vehicle Trailering System App, Inside Rearview Auo-Dimming Rear Camera Mirror, IntelliBeam Automatic High Beam on/Off, Keyless Open and Start, Lane Departure Warning System, LED Cargo Area Lighting, LED Smoked Amber Roof Marker Lamps, Low tire pressure warning, Manual Tilt-Wheel/Telescoping Steering Column, Memory seat, Multicolor 15" Diagonal Head-Up Display, Occupant sensing airbag, Off-Road High Clearance Step, Off-Road Suspension, OnStar Services Capable, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appointed Front Seat Trim, Pickup Box, Power door mirrors, Power driver seat, Power Front Passenger Windows with Express Up/Down, Power passenger seat, Power Sliding Rear Window with Defogger, Power steering, Power Sunroof, Power windows, Power-Retractable Black Assist Steps, Preferred Equipment Group 4SB, Premium audio system: Premium GMC Infotainment System, Push Button Start, Radio: AM/FM Stereo with Premium GMC Infotainment System, Rain sensing wipers, Rear Cross Traffic Alert, Rear Premium Floor Liners with Removable Carpet Insert, Rear reading lights, Rear seat center armrest, Rear step bumper, Rear Wheelhouse Liners, Rear window defroster, Remote keyless entry, Remote Vehicle Starter System, Safety Alert Seat, Security system, SiriusXM with 360L Trial Subscription, Snow Plow Prep/Camper Package, Speed control, Speed-sensing steering, Split folding rear seat, Spray-on Pickup Bedliner with GMC Logo, Steering Wheel Audio Controls, Steering wheel mounted audio controls, Tachometer, Technology Package, Telescoping steering wheel, Tilt steering wheel, Traction control, Trailer Cam Provisions and Trailer Viewing Software, Trailer Side Blind Zone Alert, Trip computer, Turn signal indicator mirrors, Ultrasonic Front and Rear Park Assist, Unauthorized Entry Theft-Deterrent System, Universal Home Remote, Variably intermittent wipers, Ventilated
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| VIN | 1GT4UPE7XTF299440 |
| Stock Number | G2784 |
| Condition | NEW |
| Year | 2026 |
| Make | GMC |
| Model | Sierra 2500HD |
| Package | AT4 |
| Mileage | NEW |
| Body Style | Pickup - Full Size |
| Engine | 6.6L 8 Cyl. Gas |
| Transmission | Automatic |
| Drive Type | 4 Wheel |
| Color | Onyx Black |
| Interior | Jet Black with Kalahari accents |
| Engine | |
| Engine Type | 6.6L 8 Cyl. Gas |
| Horsepower | 401 @ 5200 rpm |
| Torque | 464 @ 4000 rpm |
| Fuel | |
| Type | |
| Capacity | 36.0 Gallons |
| Drivetrain | |
| Driven Wheels | 4 Wheel |
| Technical Specifications | |
| Curb Weight - Front | 4013 lbs |
| Curb Weight - Rear | 2812 lbs |
| Length, Overall | 250.75 in |
| Width, Max w/o mirrors | 81.85 in |
| Height, Overall | 79.82 in |
| Gross Vehicle Weight | 10,001 lbs |
- StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
- Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
- Front and Rear Park Assist, ultrasonic
- Bed View Camera, camera in the CHMSL to show a view of the cargo bed display located in infotainment screen, includes Two Trailer Camera Provisions
- Trailer Camera Provisions and trailer viewing software
- Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
- Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
- Rear Seat Belt Indicator
- Rear Cross Traffic Alert
- Trailer Side Blind Zone Alert
- Seat Belt Adjustable Guide Loops, front row only
- Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety.)
- Safety Alert Seat
- Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
- Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
PACKAGE (2)
- X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
- ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
MECHANICAL (23)
- Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline, (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm)
- Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
- GVWR, 10,850 lbs. (4921 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18", 20" or 22" wheels.)
- Hill Descent Control
- Transfer case, two-speed active, electronic Autotrac with push button control
- Auto-locking rear differential
- Four wheel drive
- Cooling, external engine oil cooler
- Cooling, auxiliary external transmission oil cooler
- Air filter, heavy-duty
- Air filtration monitoring
- Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
- Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
- Trailer brake controller, integrated
- In-Vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert when (PTT) trailer tire pressure monitor sensors are installed.)
- Recovery hooks, Red
- Skid Plates protect the oil pan, front axle and transfer case
- Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
- Suspension, Off-Road includes twin-tube shocks
- Steering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
- Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
- Brake lining wear indicator
- Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
EXTERIOR (22)
- Tire, spare LT275/70R18 all-terrain, blackwall
- Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
- Bumper, front, body-color lower
- Bumper, rear body-color with bumper CornerSteps
- Bed Step, Black integrated on forward portion of bed on driver and passenger side
- CornerStep, rear bumper
- Cargo tie downs (12), fixed, rated at 500 lbs per corner
- Wheelhouse liners, rear
- Moldings, beltline, Black
- Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
- Fog lamps, LED
- Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
- LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
- Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
- Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger), lower convex mirrors, turn signal indicators, puddle lamps, (U12) perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) lighting
- Mirror caps, high gloss Black
- Glass, deep-tinted
- Wipers, front rain-sensing
- Door handles, body-color
- Tailgate, GMC MultiPro Tailgate with six functional load/access features NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details
- Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
- Tailgate and bed rail protection caps, top
INTERIOR (25)
- Seat, Up-level Rear with Storage Package 60/40 folding bench, includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
- Seat adjuster, driver 10-way power including lumbar
- Seat adjuster, passenger 10-way power including lumbar
- Seats, heated second row outboard seats
- Driver memory recalls driver "presets" for power driver seat and outside mirrors
- Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
- Floor covering, color-keyed carpeting
- Steering wheel, wrapped
- Steering wheel, heated
- Steering wheel audio controls
- Steering column, manual Tilt-Wheel and telescoping
- Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
- Rear Seat Reminder
- GMC Premium information Display- 13.4" diagonal Multicolor touch screen
- Exterior Temperature Display, located in radio display
- Compass, located in instrument cluster
- Remote vehicle starter system
- Adaptive Cruise Control
- Wireless Charging
- Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
- USB ports, (2) charge-only, rear
- Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
- Air vents, rear
- Air conditioning, dual-zone automatic climate control
- Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
| WHEELS 20" (50.8 CM) HIGH GLOSS BLACK ALUMINUM WHEELS 8 spokes (STD) | REAR CAMERA MIRROR inside rearview auto-dimming with full camera display |
| ALTERNATOR 220 AMP | LPO FRONT AND REAR MOLDED SPLASH GUARDS BLACK (dealer-installed) |
| TIRES LT275/65R20 ALL-TERRAIN BLACKWALL (STD) | TECHNOLOGY PACKAGE includes (DRZ) Rear Camera Mirror and (UV6) Multicolor 15" Diagonal Head-Up Display |
| JET BLACK WITH KALAHARI ACCENTS PERFORATED FRONT LEATHER SEAT TRIM | GOOSENECK / 5TH WHEEL PREP PACKAGE -- HITCH PLATFORM TO ACCEPT GOOSENECK OR 5TH WHEEL HITCH. Includes hitch platform with tray to accept ball stamped bed holes with removable caps installed and bed mounted 7-pin trailer harness (similar to UY2 harness). |
| UNIVERSAL HOME REMOTE | ENGINE 6.6L V8 with Direct Injection and Variable Valve Timing gasoline (401 hp [299 kW] @ 5200 rpm 464 lb-ft of torque [629 N-m] @ 4000 rpm) (STD) |
| SNOW PLOW PREP/CAMPER PACKAGE includes (KW5) 220-amp alternator includes increased front GAWR on Heavy Duty models (NZZ) skid plates (transfer case and oil pan) pass through dash grommet hole and roof emergency light provisions. Contact GM Upfitter Integration at www.gmupfitter.com for plow installation details and assistance. Note: if ordered for Camper usage recommend ordering (UY2) Trailering wiring provisions | AUDIO SYSTEM 13.4" DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM WITH GOOGLE BUILT IN APPS SUCH AS NAVIGATION AND VOICE ASSISTANCE includes color touch-screen multi-touch display AM/FM stereo Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones (STD) |
| SUNROOF POWER | SEATS FRONT BUCKET with center console (STD) |
| AT4 PREFERRED EQUIPMENT GROUP includes standard equipment | LICENSE PLATE KIT FRONT INCANDESCENT LIGHTING |
| LAMPS SMOKED AMBER ROOF MARKER (LED) | AT4 PREMIUM PLUS PACKAGE includes (PDO) AT4 Preferred Package (CF5) power sunroof (CWM) Technology Package and (VXW) AT4 high clearance step LPO |
| GVWR 10 850 LBS. (4921 KG) (STD) | TRANSMISSION 10-SPEED AUTOMATIC (STD) |
| ONYX BLACK | WINDOW POWER REAR SLIDING WITH REAR DEFOGGER |
| AT4 PREFERRED PACKAGE includes (UG1) Universal Home Remote (A48) rear sliding power window and (U01) Roof Marker Lamps | ASSIST STEPS POWER RETRACTABLE BLACK includes LED lighting |
| MULTICOLOR 15" DIAGONAL HEAD-UP DISPLAY | REAR AXLE 3.73 RATIO |
| Lane Departure Warning | Front Collision Mitigation |
| Front Collision Warning | Automatic Highbeams |
| Tow Hitch | Running Boards/Side Steps |
| Keyless Start | Locking/Limited Slip Differential |
| Four Wheel Drive | Tow Hooks |
| Power Steering | ABS |
| 4-Wheel Disc Brakes | Aluminum Wheels |
| Tires - Front All-Terrain | Tires - Rear All-Terrain |
| Conventional Spare Tire | Bed Liner |
| Daytime Running Lights | Automatic Highbeams |
| Fog Lamps | Heated Mirrors |
| Power Mirror(s) | Integrated Turn Signal Mirrors |
| Power Folding Mirrors | Privacy Glass |
| Intermittent Wipers | Variable Speed Intermittent Wipers |
| Rain Sensing Wipers | Integrated Tailgate Step |
| AM/FM Stereo | Navigation System |
| MP3 Capability | Bluetooth Connection |
| Auxiliary Audio Input | Smart Device Integration |
| Requires Subscription | Satellite Radio |
| Requires Subscription | Premium Sound System |
| Bluetooth Connection | Bluetooth Connection |
| Smart Device Integration | WiFi Hotspot |
| Bucket Seats | Leather Seats |
| Rear Bench Seat | Power Driver Seat |
| Driver Adjustable Lumbar | Power Passenger Seat |
| Passenger Adjustable Lumbar | Heated Front Seat(s) |
| Heated Front Seat(s) | Cooled Front Seat(s) |
| Heated Rear Seat(s) | Mirror Memory |
| Seat Memory | Floor Mats |
| Floor Mats | Heated Steering Wheel |
| Steering Wheel Audio Controls | Adjustable Steering Wheel |
| Power Windows | Power Windows |
| Power Windows | Power Door Locks |
| Keyless Entry | Power Door Locks |
| Keyless Start | Remote Engine Start |
| Cruise Control | Adaptive Cruise Control |
| Security System | MP3 Capability |
| Auxiliary Audio Input | MP3 Capability |
| Auxiliary Audio Input | Climate Control |
| Multi-Zone A/C | A/C |
| Rear Defrost | Auto-Dimming Rearview Mirror |
| Front Collision Mitigation | Front Collision Mitigation |
| Front Collision Warning | Traction Control |
| Stability Control | Daytime Running Lights |
| Daytime Running Lights | Driver Air Bag |
| Passenger Air Bag | Front Side Air Bag |
| Front Head Air Bag | Rear Head Air Bag |
| Passenger Air Bag Sensor | Telematics |
| Requires Subscription | Rear Parking Aid |
| Back-Up Camera | Aerial View Display System |
| Back-Up Camera | Front Collision Warning |
| Lane Departure Warning | Cross-Traffic Alert |
| Blind Spot Monitor | Driver Restriction Features |
| Tire Pressure Monitor | Navigation System |
| Telematics | Requires Subscription |