2026 GMC Sierra 2500HD AT4 Crew Cab 4WDFinished in Summit White with a Jet Black/Kalahari interior, this 2026 GMC Sierra 2500HD AT4 Crew Cab 4WD combines heavy-duty capability with premium comfort and advanced technology. Powered by the renowned Duramax 6.6L V8 Turbo-Diesel engine paired with the Allison 10-speed automatic transmission, this full-size heavy-duty pickup is built to confidently handle demanding work, towing, and off-road adventures. Available at Boyer GM Pickering, this Sierra 2500HD delivers the rugged capability expected from an HD truck while surrounding you with premium features and modern connectivity.

Performance & CapabilityThe legendary Duramax 6.6L V8 Turbo-Diesel provides impressive heavy-duty performance, while the Allison 10-speed automatic transmission helps deliver smooth, responsive power across a wide range of driving conditions. A 2-speed electronic Autotrac transfer case, automatic locking rear differential, and BFGoodrich LT275/65R20 Off-Road T/A KO3 tires help maximize traction when conditions become challenging.

This Sierra is well-equipped for towing with a factory trailer brake controller, trailering package with Hitch Guidance and Hitch View, in-vehicle trailering app, and a Gooseneck/5th Wheel Prep Package, making it ready for hauling large trailers with greater confidence. StabiliTrak with Trailer Sway Control and Hill Start Assist further enhances stability while towing or driving on steep grades.

InteriorInside, the cabin balances rugged durability with premium comfort. Heated and ventilated front seats, heated outboard rear seats, a 10-way power drivers seat with memory, and a heated leather-wrapped steering wheel help keep everyone comfortable throughout every season.

The AT4 Premium Plus Package adds even more convenience with a power sunroof, power sliding rear window, rear camera mirror, multicolor 15-inch Head-Up Display, and Universal Home Remote, creating an upscale driving environment designed for both work and everyday use. Wireless charging and dual-zone automatic climate control add even more convenience to daily driving.

TechnologyA 13.4-inch GMC Premium Infotainment System with Google built-in compatibility, navigation capability, Bluetooth, wireless Apple CarPlay, and wireless Android Auto keeps you connected wherever the road leads.

The 12.3-inch configurable Driver Information Centre displays key vehicle information clearly, while the Bose premium speaker system delivers rich, immersive sound. Additional technology includes Remote Vehicle Start, OnStar Basics, Bed View Camera, and a three-year SiriusXM subscription.

ExteriorThe bold AT4 styling is complemented by 20-inch high-gloss black aluminum wheels, animated LED projector headlamps, LED fog lamps, and LED cargo bed lighting. Practical features such as the spray-on bedliner, GMC MultiPro Tailgate, EZ-Lift power lock and release tailgate with hitch area light, rear wheelhouse liners, rain-sensing wipers, and power-folding, heated trailering mirrors enhance everyday usability.

The AT4 Premium Plus Package also includes LED roof marker lamps and dealer-installed off-road high-clearance steps, further emphasizing this trucks rugged appearance and functionality.

SafetyThe Sierra HD Pro Safety suite provides a comprehensive collection of driver-assistance technologies designed to enhance confidence on every drive. Features include:

Trailer Side Blind Zone Alert

Rear Cross Traffic Alert

HD Surround Vision

Front and Rear Park Assist

Automatic Emergency Braking

Forward Collision Alert

Front Pedestrian Braking

Lane Departure Warning

Following Distance Indicator

IntelliBeam Automatic High Beams

Driver Safety Alert Seat

Adaptive Cruise Control

As a heavy-duty pickup, the 2026 GMC Sierra 2500HD AT4 stands out by combining serious towing capability, off-road-ready equipment, premium comfort, and advanced technology into one exceptionally versatile truck.

Why Buy Your Vehicle at Boyer GM Pickering?At Boyer GM Pickering, were proud to serve drivers throughout Pickering, Ajax, Whitby, Oshawa, Scarborough, Markham, Toronto, Durham Region, and the Greater Toronto Area.

When you choose Boyer GM Pickering, you can expect:

A transparent, no-pressure buying experience

Competitive financing and lease options

Fair trade-in evaluations

Certified GM service and genuine GM parts

Knowledgeable product specialists

A trusted GM dealership proudly serving Durham Region and the GTA

If youre looking for a premium heavy-duty diesel pickup thats ready for work, recreation, and everything in between, contact Boyer GM Pickering today to request more information, schedule a test drive, or visit our dealership to experience this 2026 GMC Sierra 2500HD AT4 Crew Cab 4WD in person.

ELIGIBLE for new car incentives* Opportunity to save over a brand new model! A Company Demonstrator used vehicle driven by dealership staff. Compatible with New Vehicle incentives and national offers. Speak to our sales team today for full details and current odometer reading. Mileage: N/A

Your Satisfaction Measures Our SuccessCome and join the excitement at Michael Boyer Chevrolet Buick GMC Cadillac in Pickering, Ontario!

For over 30 years, Michael Boyer Chevrolet Buick GMC Cadillac has proudly served Pickering, Ajax, Whitby, Oshawa, Scarborough, Markham, Toronto, Durham Region, and the Greater Toronto Area. Our commitment has always been simple: provide exceptional customer service, competitive pricing, and a vehicle-buying experience built on trust.

Whether youre shopping for a new or pre-owned vehicle, looking to trade in your current vehicle, or exploring financing and leasing options, our experienced team is here to help every step of the way. With a large selection of vehicles in stock, certified GM service, genuine GM parts, and convenient access just off Highway 401 at Whites Road in Pickering, we make it easy to find the right vehicle for your needs.

Visit Boyer GM Pickering today, browse our inventory online, or chat with our team to discover why so many drivers throughout Durham Region and the GTA choose Michael Boyer Chevrolet Buick GMC Cadillac.

Michael Boyer Chevrolet Buick GMC Cadillac

715 Kingston Road, Pickering, ON L1V 1A9

905 831-2693



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Engine: Duramax 6.6L Turbo-Diesel V8 B20-Diesel compatible
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