The 2025 GMC Sierra 3500HD Denali blends luxury-grade refinement, heavy-duty capability, and advanced trailering technology into a pickup built for those who demand the very best. With its bold chrome styling, premium Denali appointments, and legendary Duramax diesel power, this heavy-duty truck is engineered to conquer demanding workloads while surrounding occupants with first-class comfort and cutting-edge innovation. 

Performance & Capability 

Engine: Duramax 6.6L V8 Turbo-Diesel delivering exceptional horsepower, massive torque, and confident heavy-duty performance 

Transmission: Allison 10-Speed Automatic Transmission engineered for smooth shifting and optimized towing capability 

Drivetrain: Autotrac Two-Speed 4-Wheel Drive system providing dependable traction in all conditions 

Off-Road Suspension Package enhancing ride control and capability on rough terrain 

Automatic Locking Rear Differential improving traction on loose or challenging surfaces 

3.42 Rear Axle Ratio balancing towing performance with highway efficiency 

Integrated Trailer Brake Controller for enhanced trailer control and confidence 

Exhaust Brake assisting with downhill towing and reducing brake wear 

Heavy-Duty Air Filtration System and Engine Oil Cooler designed for demanding workloads 

Transmission Oil Cooler helping maintain performance under heavy loads 

Hill Descent Control for greater confidence on steep grades 

Trailering Package with Hitch Guidance, Hitch View, Trailer Camera Provisions, and In-Vehicle Trailering App 

FlexRide Drive Mode System optimizing performance for towing, hauling, and varying road conditions 

Winter & Weather Comfort 

Heated & Ventilated Front Seats providing year-round comfort regardless of temperature 

Heated Rear Outboard Seats ensuring premium comfort for second-row passengers 

Heated Steering Wheel for added warmth during cold-weather driving 

Remote Vehicle Start System allowing the cabin to warm up or cool down before departure 

Dual-Zone Automatic Climate Control providing personalized comfort for driver and passenger 

Rain-Sensing Windshield Wipers automatically responding to changing weather conditions 

Rear Window Defogger improving visibility during winter driving 

Engine Block Heater enhancing cold-weather starting reliability 

Winter Grille Cover helping maintain engine efficiency during extreme temperatures 

Dealer-Installed All-Weather Floor Liners helping protect the interior from snow, mud, and debris 

Interior Comfort & Convenience 

Premium Denali Interior with upscale materials, refined craftsmanship, and signature styling details 

Front Bucket Seats with Power Driver and Passenger Adjustments plus Power Lumbar Support 

Driver Memory System storing preferred seating and mirror positions 

Power Sliding Rear Window adding ventilation and convenience 

Rear Seat Storage Package providing secure and practical cargo organization 

Wireless Charging Pad for effortless device charging without cables 

Keyless Open & Push-Button Start for seamless access and ignition 

Wireless Apple CarPlay & Android Auto smartphone integration 

13.4 GMC Premium Infotainment Touchscreen with Google Built-In and Navigation capability 

12 Reconfigurable Digital Driver Information Centre offering customizable vehicle information 

Bose Premium Audio System delivering rich, immersive sound quality 

Multi-Colour 15 Head-Up Display projecting critical information directly into the drivers line of sight 

Rear Camera Mirror providing an expanded and unobstructed rearward view 

Multiple USB Ports and 120-Volt Power Outlets throughout the cabin for added convenience 

Universal Home Remote for compatible garage doors and home automation systems 

Wi-Fi Hotspot Capability helping keep passengers connected on every journey 

Safety & Driver Assistance 

Sierra HD Pro Safety Suite providing advanced driver-assistance technologies 

Forward Collision Alert helping monitor potential hazards ahead 

Automatic Emergency Braking enhancing confidence in emergency situations 

Front Pedestrian Braking adding protection in busy urban environments 

Lane Departure Warning helping maintain proper lane positioning 

Adaptive Cruise Control for more relaxed highway travel 

Following Distance Indicator providing additional awareness in traffic 

Driver Safety Alert Seat delivering intuitive safety notifications through seat vibrations 

Rear Cross Traffic Alert helping detect approaching vehicles while reversing 

Trailer Side Blind Zone Alert enhancing awareness while towing larger trailers 

Front & Rear Park Assist simplifying parking and maneuvering 

HD Surround Vision delivering a comprehensive 360-degree view around the truck 

Bed View Camera and Trailer Camera Provisions improving visibility when loading cargo or towing 

Teen Driver Mode and Buckle-to-Drive technology promoting safer driving habits 

Exterior Styling & Utility 

20 Machined Aluminum Wheels paired with All-Terrain Tires for a bold and capable stance 

Exterior Colour: Sterling Metallic sophisticated, modern, and perfectly suited to the Denalis premium character 

Signature Denali Chrome Grille and Exterior Accents creating an unmistakable road presence 

LED Headlamps, LED Fog Lamps, Roof Marker Lamps, and Cargo Bed Lighting for exceptional visibility 

Chrome Assist Steps providing convenient cab access and premium styling 

Chrome Recovery Hooks adding functionality and a distinctive heavy-duty appearance 

GMC MultiPro Tailgate offering multiple configurations for loading, work, and cargo management 

EZ Lift Power Lock & Release Tailgate enhancing convenience during everyday use 

Spray-On Bedliner protecting the cargo box from scratches, dents, and wear 

120-Volt Bed-Mounted Power Outlet providing convenient power for tools, equipment, and recreation gear 

Heated Power-Folding Trailering Mirrors with Auto-Dimming functionality for enhanced towing visibility 

Rear Bumper CornerSteps making bed access quick and easy 

Deep-Tinted Glass and premium exterior trim adding refinement and privacy 

Whether youre hauling heavy equipment, towing a large RV, or simply enjoying the commanding presence of a premium heavy-duty truck, the 2025 GMC Sierra 3500HD Denali delivers uncompromising capability, advanced technology, and luxurious comfort. Its the ultimate combination of professional-grade strength and Denali sophistication, built to handle the toughest jobs while treating every drive like a first-class experience. 

 



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 EquipmentStabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assistAirbags, 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 driverRear Seat ReminderHitch Guidance dynamic single line to aid in truck trailer alignment for hitchingSafety Alert SeatTrailer Side Blind Zone AlertTire Pressure Monitoring System auto learn, includes Tire Fill Alert (does not apply to spare tire)Hitch 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.Trailer 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 onlyRear Seat Belt Indicator (Requires Crew Cab or Double Cab model.)OnStar Services capable (See onstar.ca for details and limitations. Services vary by model. Service plan required.)Daytime Running Lamps LED signature lightingHill Descent Control (Not available with dual rear wheels.)Bed View Camera camera in the CHMSL to show a view of the cargo bed, display located in infotainment screen, includes Two Trailer Camera ProvisionsBuckle 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)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 EquipmentSeating, heated driver and front outboard passengerSeats, ventilated driver and front passengerSeats, heated second row outboard seatsDriver memory, recalls driver "presets" for power driver seat and outside mirrorsCentre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capabilityFloor covering, colour-keyed carpetingSteering wheel, heatedSteering wheel audio controlsExterior Temperature Display located in radio displayCompass, located in instrument clusterWindow, power front, drivers express up/downWindow, power front, passenger express up/downWindows, power rear, express downDoor locks, powerRemote vehicle starter systemUniversal Home RemoteTheft-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-dimmingAir conditioning, dual-zone automatic climate controlSteering column, manual Tilt-Wheel and telescopingAdaptive Cruise ControlSteering wheel, wrappedWireless ChargingUSB Ports, 2 (first row) located on consoleAir vents, rearDriver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital displayUSB Ports, 2, Charge/Data ports located inside centre consoleAssist handles, front A-pillar mounted for driver and passenger, rear B-pillar mountedSeats, front bucket with centre consoleGMC Premium information Display- 13.4" diagonal Multicolour touch screenKeyless Open and Start includes remote keyless entryUSB ports, (2) charge-only, rearSeat trim, Forge Perforated Leather seating surfacesSeat adjuster, driver 12-way power including lumbarSeat adjuster, passenger 12-way power including lumbarSeat, 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 underseat storage, (includes child seat top tether anchor)Floor mats, carpeted front (Unique premium carpet. Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)Floor mats, carpeted rear (Unique premium carpet. Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)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.)Exterior EquipmentTire, spare LT275/70R18 all-terrain, blackwall (Included and only available with (QF9) LT275/65R20 all-terrain, blackwall tires on single rear wheel models.)Single Rear WheelsTire carrier lock keyed cylinder lock that utilizes same key as ignition and doorCornerStep, rear bumperMouldings, beltline, stainless steelMirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])Mirror caps, chromeGlass, deep-tintedWindow, power, rear sliding with rear defoggerDoor handles, chromeTailgate and bed rail protection caps, topLamps, cargo area, cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheelWipers, front rain-sensingFog lamps, LEDBed Step, Black integrated on forward portion of bed on driver and passenger sideBumper, front, body-colour lowerBumper, rear body-colour with bumper CornerStepsIntelliBeam, 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 lampsTailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area lightHeadlamps, Animated LED projectors, LED turn signals and Daytime Running LampsWheels, 20" (50.8 cm) Ultra-bright machined wheels with bright chrome inserts with Black painted pockets (Requires single rear wheels.)Tires, LT275/65R20 all-terrain, blackwall (Requires single rear wheels.)Assist steps, chromed tubular, 6" rectangular cab length (factory installed) (Not available with (BRS) power-retractable assist steps with LED perimeter lighting.)Wheelhouse liners, rear (Not available with dual rear wheel models.)Lamps, Smoked Amber roof marker, (LED) (Standard with dual rear wheels.)LPO, Polished exhaust tip (dealer-installed) (Requires (L8T) 6.6L V8 gas engine. Not included with (L5P) Duramax 6.6L Turbo Diesel V8 engine.)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 detailsBed Liner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel)Cargo tie downs (12), fixed, rated at 500 lbs per cornerGrille, Signature Chrome Denali grilleEntertainment EquipmentBose Sound System, premium 7-speaker system with Richbass wooferBluetooth for phone connectivity to vehicle infotainment systemWireless 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 phones.Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)SiriusXM 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 monitoringTransfer case, two-speed active electronic Autotrac with push button controlFour 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 sectionBrakes, 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 differentialTransmission, Allison 10-Speed automaticSkid Plates protect the oil pan, front axle and transfer caseCapless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)GVWR, 11,550 lbs. (5239 kg) with single rear wheels (Included and only available with TK30743 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)Recovery hooks, front, Chrome (Plant installed.)Suspension, Off-Road includes twin-tube shocks (Not available with dual rear wheels.)Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigueOther EquipmentTrailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch GuidanceSierra 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 AppX31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks (Not available with dual rear wheels.)