Turbocharged Diesel V8 6.6L engine for powerful performance - Advanced navigation system with premium audio - Adaptive Cruise Control and Lane Departure Warning for enhanced safety - Power Locks - Stability Control

Introducing the 2025 GMC Sierra 2500HD AT4, a previously owned powerhouse designed for those who demand both rugged capability and refined luxury. This 4x4 Crew Cab, finished in a sleek black exterior, is ideal for drivers who need a robust vehicle for work or play, offering the perfect blend of performance and comfort. The AT4 trim adds a touch of sophistication with its premium features and off-road prowess, making it a standout choice for Canadian adventurers.

Under the hood, the Sierra 2500HD AT4 is equipped with a formidable 6.6L Turbocharged Diesel V8 engine, paired with an automatic transmission. This combination ensures a smooth and powerful driving experience, whether you're towing heavy loads or cruising on the highway. The diesel engine's efficiency and torque make it a reliable companion for long journeys and challenging terrains, while the 4x4 drive provides exceptional traction and control in diverse weather conditions.

Step inside, and you'll find a cabin that prioritizes comfort and technology. The leather interior and bucket seats offer a luxurious feel, while the heated steering wheel and climate control system ensure a pleasant ride in any season. Stay connected and entertained with the advanced navigation system, premium audio, and satellite radio, all easily accessible via steering wheel audio controls. Memory seats and power adjustments add a layer of convenience for drivers and passengers alike.

Safety is paramount in the Sierra 2500HD AT4, featuring a suite of driver assistance technologies designed to enhance your peace of mind. Adaptive cruise control, lane departure warning, and reverse park assist provide added confidence on the road, while stability control and traction control keep you secure in various driving conditions. The inclusion of fog lights, rain sensor wipers, and auto-dimming mirrors further enhance visibility and safety.

Overall, the 2025 GMC Sierra 2500HD AT4 is a versatile and capable truck that combines strength with sophistication. Its impressive powertrain, advanced technology, and comprehensive safety features make it an excellent choice for those who refuse to compromise on quality and performance.

Specifications
Engine: Turbocharged Diesel V8 6.6L
Drive: 4x4
Interior: Leather with Heated Steering Wheel
Safety: Adaptive Cruise Control, Lane Departure Warning
Technology: Navigation System, Premium Audio

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Engine: Turbocharged Diesel V8 6.6L/
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. OnStar Basics includes access to remote commands through your vehicle's mobile app (compatible smartphone required); Automatic Crash Response (not all vehicles may transmit all crash data; OnStar links to emergency services); and wireless connectivity for select apps that provide in-vehicle voice assistance and navigation with real-time traffic (Voice & Maps apps are subject to change at any time and may be provided by third parties). Term begins from date of vehicle delivery. 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. For customers who also separately receive or purchase a Premium Plan or Vehicle Data Plan to use Wi-Fi Hotspot and In-Vehicle Apps, the data provided as part of that plan will also be used by any Voice & Maps apps which already had data connectivity under this Basics plan; if any applicable data caps are reached, Voice & Maps apps will continue to function for the duration of this Basics plan but additional vehicle data plan(s) must be purchased to use Wi-Fi Hotspot and In-Vehicle Apps. Services, connectivity, and capabilities have additional terms and limitations and are subject to change, and will vary by model, vehicle configuration, conditions, and geographical and technical restrictions. Non-refundable and no cash value. See onstar.ca for 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 AutoSiriusXM with 360L Trial Subscription. SiriusXM with 360L transforms your customers' ride with our most extensive and personalized radio experience on the road. (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.)Audio 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 SubscriptionMechanical 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, RedTransmission, Allison 10-Speed automaticTransfer 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.)Other 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 AppENGINE DURAMAX 6.6L TURBO-DIESEL V8 B20-DIESEL COMPATIBLE (470 hp [350.5 kW] @ 2800 rpm 975 lb-ft of torque [1322 Nm] @ 1600 rpm) (Includes (K05) engine block heater.),Front Collision Warning,Automatic Highbeams,Tow Hitch,Front Collision Mitigation,Lane Departure Warning,Running Boards/Side Steps,Bluetooth Connection,Daytime Running Lights,Power Windows,Front Collision Mitigation,Requires Subscription,Auxiliary Audio Input,MP3 Capability,Heated Front Seat(s),Smart Device Integration,MP3 Capability,Driver Air Bag,Driver Adjustable Lumbar,Power Windows,Requires Subscription,Stability Control,Remote Engine Start,Fog Lamps,Navigation System,ABS,Privacy Glass,Leather Seats,Premium Sound System,Floor Mats,Rear Defrost,Adaptive Cruise Control,Front Collision Warning,Telematics,Front Collision Mitigation,Power Windows,Aluminum Wheels,Power Door Locks,Tires - Rear All-Terrain,Rear Bench Seat,Power Door Locks,Heated Steering Wheel,Cruise Control,Passenger Air Bag,AM/FM Stereo,Auxiliary Audio Input,Keyless Start,Aerial View Display System,Daytime Running Lights,Rain Sensing Wipers,Rear Parking Aid,Automatic Highbeams,Pass-Through Rear Seat,Traction Control,MP3 Capability,Passenger Air Bag Sensor,Seat Memory,Variable Speed Intermittent Wipers,Climate Control,Four Wheel Drive,A/C,Cooled Front Seat(s),Power Folding Mirrors,Adjustable Steering Wheel,Keyless Start,Steering Wheel Audio Controls,Bucket Seats,Telematics,Cross-Traffic Alert,Locking/Limited Slip Differential,Heated Mirrors,Auxiliary Audio Input,WiFi Hotspot,Bluetooth Connection,Power Driver Seat,Driver Restriction Features,Requires Subscription,Front Head Air Bag,Conventional Spare Tire,Power Passenger Seat,Integrated Tailgate Step,Auto-Dimming Rearview Mirror,Tires - Front All-Terrain,Satellite Radio,4-Wheel Disc Brakes,Back-Up Camera,Lane Departure Warning,Front Collision Warning,Power Steering,Smart Device Integration,Tire Pressure Monitor,Front Side Air Bag,Bed Liner,Floor Mats,Multi-Zone A/C,Tow Hooks,Daytime Running Lights,Integrated Turn Signal Mirrors,Heated Rear Seat(s),Requires Subscription,Rear Head Air Bag,Blind Spot Monitor,Back-Up Camera,Security System,Heated Front Seat(s),Passenger Adjustable Lumbar,Bluetooth Connection,Keyless Entry,Mirror Memory,Power Mirror(s),Intermittent Wipers