The 2026 GMC Sierra 2500HD AT4 Crew Cab Standard Box 4-Wheel Drive combines uncompromising Duramax diesel strength with rugged off-road capability and premium AT4 refinement. Finished in commanding Onyx Black with a Jet Black/Kalahari interior, this heavy-duty pickup is engineered for serious towing and hauling while delivering the technology, comfort, and confidence you want every day. 

Performance & Capability 

Engine: 6.6L Duramax V8 Turbo-Diesel delivering immense power and torque for demanding work and towing 

Transmission: 10-speed automatic transmission providing smooth, confident power delivery 

Drivetrain: 4-Wheel Drive with AutoTrac two-speed transfer case for enhanced traction and terrain versatility 

Rear Axle: 3.42 axle ratio engineered for strong pulling performance 

Automatic Locking Rear Differential helps maximize traction in challenging conditions 

Off-Road Suspension & Skid Plates provide added durability and confidence when the pavement ends 

Hill Descent Control helps maintain controlled speed on steep or uneven terrain 

Exhaust Brake provides additional control when towing or descending grades 

Digital Variable Steering Assist delivers responsive handling and confident maneuverability 

Heavy-Duty Air Filter, Engine Oil Cooler & Transmission Oil Cooler support demanding truck operation 

11,350-lb GVWR reinforces the Sierra HDs heavy-duty capability 

Towing & Trailering 

Gooseneck/5th-Wheel Prep Package prepares the truck for serious trailer applications 

Integrated Trailer Brake Controller provides convenient control over trailer braking 

Hitch Guidance & Hitch View simplify trailer hookup and alignment 

Trailer Camera Provisions & Bed View Camera provide enhanced visibility around the truck and trailer 

Trailer Side Blind Zone Alert helps monitor hard-to-see areas when towing 

In-Vehicle Trailering App provides useful trailer information and functionality 

Heated, Power & Auto-Dimming Trailering Mirrors offer excellent visibility in changing conditions 

GMC MultiPro Tailgate with EZ Lift Power Lock & Release adds versatility and convenience for loading and unloading 

Winter & Weather Comfort 

Heated & Ventilated Front Seats provide year-round comfort 

Heated Second-Row Outboard Seats add warmth for rear passengers 

Heated Steering Wheel keeps winter drives more comfortable 

Remote Vehicle Start allows the cabin to warm up before you get behind the wheel 

Engine Block Heater supports dependable cold-weather starts 

Dual-Zone Automatic Climate Control provides personalized cabin temperatures 

Reinforced Electric Heater/Defroster System helps clear the windshield and warm the cabin 

Rain-Sensing Windshield Wipers & Rear Window Defogger add convenience in changing weather 

All-Weather Floor Liners help protect the cabin from snow, mud, and moisture 

Interior Comfort & Technology 

Jet Black/Kalahari AT4 Interior creates a premium yet rugged cabin atmosphere 

Power Front Bucket Seats with memory settings provide personalized comfort 

Power Sliding Rear Window adds ventilation and versatility 

Power Sunroof brings natural light and an open-air feel to the cabin 

13.4 GMC Premium Infotainment System with Google Built-In keeps entertainment and connectivity within easy reach 

12 Reconfigurable Digital Driver Display presents important vehicle information clearly 

Multicolor 15 Head-Up Display projects key information conveniently into the drivers view 

Rear Camera Mirror enhances rearward visibility 

Wireless Charging & Wireless Phone Projection keep compatible devices connected with minimal clutter 

Bose Premium Audio System delivers rich, immersive sound 

120V Power Outlets, USB Ports & Wi-Fi Capability provide convenient connectivity for passengers and equipment 

Universal Home Remote adds convenience for compatible garage doors and systems 

Safety & Driver Assistance 

GMC Pro Safety technologies provide added confidence on every drive 

Forward Collision Alert & Automatic Emergency Braking help identify potential frontal hazards 

Front Pedestrian Braking adds additional awareness around pedestrians 

Lane Departure Warning & Following Distance Indicator support attentive driving 

Adaptive Cruise Control provides added convenience on longer highway drives 

Front & Rear Park Assist helps simplify maneuvering in tight spaces 

HD Surround Vision provides enhanced visibility around the truck 

Rear Cross Traffic Alert helps detect approaching vehicles while reversing 

Drivers Safety Alert Seat provides intuitive seat-based warnings 

IntelliBeam Automatic High Beams automatically adjust lighting based on traffic 

Teen Driver Mode, Buckle-to-Drive & Rear Seat Reminder add additional awareness and convenience 

Exterior Styling & Utility 

Onyx Black Exterior delivers a bold and unmistakable AT4 appearance 

20 Black Aluminum Wheels paired with LT275/65R20 All-Terrain Tires provide a commanding stance and confident traction 

Off-Road High-Clearance Steps provide easier access while maintaining a rugged AT4 profile 

Red Front Recovery Hooks add signature AT4 styling and functional capability 

LED Headlamps, LED Fog Lamps & LED Roof Marker Lamps provide strong illumination and distinctive styling 

LED Cargo Bed Lighting improves visibility when loading or working after dark 

Spray-On Bedliner helps protect the cargo box from everyday wear 

120V Bed-Mounted Power Outlet provides convenient power for tools, equipment, or outdoor activities 

Rear Bumper Corner Steps make cargo-bed access easier 

Whether youre pulling a fifth-wheel, hauling equipment, navigating winter roads, or exploring rugged backcountry terrain, the 2026 GMC Sierra 2500HD AT4 delivers serious Duramax capability with premium comfort and advanced technology. Its a heavy-duty truck built to work hard, travel confidently, and stand apart wherever it goes. 

 



AMVIC Licensed Dealer

*Every reasonable effort is made to ensure the accuracy of the information shown. The Standard Equipment listed is provided at the time of the manufacture and may not match the exact vehicle displayed. Please confirm with a sales representative the accuracy of this information.

Safety EquipmentAirbags, 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 airbagFront and Rear Park Assist, ultrasonicRear Cross Traffic AlertTeen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behaviour. 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 driverStabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assistDaytime Running Lamps, LED signature lightingHitch Guidance dynamic single line to aid in truck trailer alignment for hitchingRear Seat Belt IndicatorTire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)Safety Alert SeatTrailer Side Blind Zone AlertHitch Guidance with Hitch View with image adjustment, Pan/Zoom/TiltFront Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)LED Signature DRL'sHD Surround Vision provides the driver with an overhead view of the scene around the vehicle on a centre stack display. Includes front camera washer.Bed View Camera, camera in the CHMSL to show a view of the cargo bed display located in infotainment screen, includes Two Trailer Camera ProvisionsTrailer Camera Provisions and trailer viewing softwareForward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)Seat Belt Adjustable Guide Loops, front row onlyBuckle 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.)Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel traileringOnStar Services capable (See onstar.ca for details and limitations. Services vary by model. Service plan required.)OnStar Basics (OnStar Fleet Basics for Fleet) Drive more confidently with up to 8 years of core OnStar services including mobile app commands, connectivity for select apps that provide in-vehicle voice assistance and navigation with real-time traffic, and Automatic Crash Response. (Requires (UE1) OnStar. Term begins on vehicle delivery date. Paid subscription required after expiry. Services are dependent on compatible wireless networks provided by third-party wireless service providers, working vehicle electrical systems, GPS signal and other factors outside GM control. Changes in technology and wireless networks may limit or prevent the operation of certain services. Services, connectivity, and capabilities have additional terms and limitations and are subject to change, and will vary by model, vehicle configuration, software version, conditions, and geographical and technical restrictions. Compatible smartphone required for mobile app commands. Not all vehicles may transmit all crash data; OnStar links to emergency services; Voice and Maps apps are subject to change at any time and may be provided by third parties. Non-refundable and no cash value. See onstar.ca/en/info for terms and details.)Interior EquipmentSeat adjuster, driver 10-way power including lumbarSeat adjuster, passenger 10-way power including lumbarSeating, heated driver and front outboard passengerSeats, ventilated driver and front passengerSeats, heated second row outboard seatsCentre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capabilityFloor covering, colour-keyed carpetingSteering wheel, heatedSteering wheel audio controlsCompass, located in instrument clusterWindow, power front, passenger express up/downWindows, power rear, express downDoor locks, powerRemote vehicle starter systemTheft-deterrent system, unauthorized entryPower outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)Defogger, rear-window electricMirror, inside rearview auto-dimmingAssist handles front A-pillar mounted for driver and passenger, rear B-pillar mountedAir conditioning, dual-zone automatic climate controlExterior Temperature Display, located in radio displaySteering column, manual Tilt-Wheel and telescopingRear Seat ReminderAdaptive Cruise ControlSteering wheel, wrappedWireless ChargingUSB Ports, 2 (first row) located on consoleAir vents, rearDriver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital displayWindows, power front, drivers express up/downDriver memory recalls driver "presets" for power driver seat and outside mirrorsUSB Ports, 2, Charge/Data ports located inside centre consoleSeats, front bucket with centre consoleSeat trim, Perforated front LeatherSeat, Up-level Rear with Storage Package 60/40 folding bench for Crew Cab models, includes full-length bench seat, seatback storage on left and right side, centre fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)Premium Floor Liners with removable carpet insert, frontPremium Floor Liners with removable carpet insert, rearGMC Premium information Display- 13.4" diagonal Multicolour touch screenKeyless Open and Start includes remote keyless entryUSB ports, (2) charge-only, rearExterior EquipmentTires, LT275/65R20 all-terrain, blackwallTire carrier lock keyed cylinder lock that utilizes same key as ignition and doorCornerStep, rear bumperCargo tie downs (12), fixed, rated at 500 lbs (226.8 kg) per cornerLamps, cargo area cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheelGlass, deep-tintedTailgate and bed rail protection caps, topDoor handles, body-colourMouldings, beltline, BlackMirror caps, high gloss BlackWheelhouse liners, rearWipers, front rain-sensingFog lamps, LEDBed Step, Black integrated on forward portion of bed on driver and passenger sideWheels, 20" (50.8 cm) High Gloss black aluminum wheels 8 spokesTire, spare LT275/70R18 all-terrain, blackwallBumper, front, body-colour lowerBumper, rear body-colour with bumper CornerStepsGrille (Gloss Black header and grille insert bars with Black Chrome accents.)Headlamps, Animated LED projectors LED turn signals and Daytime Running LampsIntelliBeam, automatic high beam on/off (Included and only available with (PDI) Sierra HD Pro Safety.)LED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fobTaillamps, Animated LED Signature Tail, Stop, turn and Reverse lampsMirrors, 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]) lightingTailgate, 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 detailsTailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area lightBedliner, Spray-on, Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel)Entertainment EquipmentBose Sound System, premium 7-speaker system with Richbass wooferBluetooth for phone connectivity to vehicle infotainment systemWi-Fi Hotspot capable (Terms and limitations apply. See onstar.ca or dealer for details.)Wireless phone projection for Apple CarPlay and Android AutoAudio System, 13.4" diagonal Premium GMC Infotainment System with Google built in apps such as navigation and voice assistance includes colour 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 phonesSiriusXM Trial SubscriptionSiriusXM with 360L Trial Subscription. SiriusXM with 360L transforms your customers' ride with our most extensive and personalized radio experience on the road. (IMPORTANT: The SiriusXM trial subscription is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. Certain features and/or content may not be available unless an active data connection is enabled in the vehicle. Content varies by SiriusXM subscription plan. Features and display may vary by vehicle. All SiriusXM services require a subscription, sold separately by SiriusXM after the trial period. Your SiriusXM service will automatically stop at the end of your trial unless you decide to subscribe. If you decide to continue service after your trial, the subscription plan you choose will continue for an indeterminate term and you will be charged according to your chosen payment method at the then current rates unless and until you cancel. Taxes apply. Please see the SiriusXM Customer Agreement at siriusxm.ca/terms for complete terms and how to cancel, which includes calling SiriusXM at 1-888-539-7474. All rates, content, and programming are subject to change. SiriusXM uses personal information in accordance with SiriusXM Privacy Policy, available at siriusxm.ca/privacy. SiriusXM Canada Inc. "SiriusXM", the SiriusXM logo, channel names and logos are trademarks of Sirius XM Radio Inc. and are used under license.)Mechanical EquipmentEngine, 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)Air filtration monitoringFour wheel driveCooling, external engine oil coolerCooling, auxiliary external transmission oil coolerBattery, 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, integratedFrame, fully-boxed, hydroformed front section and a fully-boxed stamped rear sectionSteering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigueBrakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotorsBrake lining wear indicatorRear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)Pickup bed includes bed assist stepPush Button StartAir filter, heavy-dutyAuto-locking rear differentialHill Descent ControlRecovery hooks, RedTransfer case, two-speed active, electronic Autotrac with push button controlIn-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.)Skid Plates protect the oil pan, front axle and transfer caseSuspension, Off-Road includes twin-tube shocksCapless Fuel Fill (Requires (L8T) 6.6L gas V8 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.)Transmission, 10-Speed automaticOther EquipmentTrailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch GuidanceX31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocksSierra HD Pro Safety includes (UEU) Forward Collision Alert, (UE4) Following Distance Indicator, (UKJ) Front Pedestrian Braking, (TQ5) IntelliBeam, (UFL) Lane Departure Warning, (T8Z) Buckle to Drive and (UHY) Automatic Emergency BrakingProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App