The 2026 GMC Sierra 3500HD SLT blends heavy-duty capability, premium craftsmanship, and advanced towing technology into one exceptionally capable truck. Powered by the legendary Duramax Turbo-Diesel engine and equipped with GMCs latest trailering innovations, this Sierra HD is built to handle demanding jobs while surrounding occupants with comfort, refinement, and confidence. 

Performance & Capability 

Engine: Duramax 6.6L V8 Turbo-Diesel delivering exceptional torque, towing capability, and long-haul durability 

Transmission: Allison-inspired 10-speed automatic transmission engineered for smooth, intelligent shifting under load 

Drivetrain: Autotrac 4-Wheel Drive 4WD with two-speed transfer case for confident traction in all conditions 

Rear Axle Ratio: 3.42 ratio optimized for towing performance and highway efficiency 

Automatic Locking Rear Differential for enhanced traction on challenging surfaces 

Exhaust Brake System helping improve downhill control while towing 

Heavy-Duty Air Filtration and Cooling Systems designed for demanding workloads 

Standard Heavy-Duty Suspension Package delivering stability and ride confidence 

Digital Variable Steering Assist for precise handling and control 

Engine Block Heater for reliable cold-weather operation 

220-Amp Alternator supporting demanding electrical and trailering needs 

Trailering & Work-Ready Capability 

Integrated Trailer Brake Controller for confident towing management 

Gooseneck / 5th-Wheel Prep Package ready for serious hauling applications 

GMC ProGrade Trailering System with In-Vehicle Trailering App 

Hitch Guidance with Hitch View simplifying trailer connections 

Trailer Camera Provisions for expanded visibility while towing 

Bed View Camera providing a clear look into the cargo box 

Trailer Side Blind Zone Alert enhancing awareness on the highway 

Factory Trailering Equipment Package engineered for heavy-duty performance 

Spray-On Bedliner protecting the cargo box from wear and tear 

120-Volt Bed-Mounted Power Outlet providing convenient power at the job site 

LED Cargo Bed Lighting for improved visibility after dark 

Rear Wheelhouse Liners helping protect the bed from road debris 

Interior Comfort & Convenience 

Front Bucket Seats with premium SLT interior appointments 

Heated & Ventilated Front Seats for year-round comfort 

Heated Rear Outboard Seats providing second-row passenger comfort 

Power Driver and Front Passenger Seats with customizable adjustments 

Driver Memory Settings for seat and mirror positioning 

Heated Steering Wheel for added cold-weather convenience 

Dual-Zone Automatic Climate Control maintaining personalized comfort 

Power Sliding Rear Window for enhanced ventilation and convenience 

Rear Seat Storage Package maximizing interior utility 

Remote Vehicle Start System allowing cabin pre-conditioning 

Keyless Open & Push-Button Start for effortless access 

Universal Home Remote for garage doors and compatible devices 

Power Sunroof bringing fresh air and natural light into the cabin 

All-Weather Floor Liners providing added interior protection 

Technology & Connectivity 

13.4-Inch GMC Premium Infotainment Touchscreen with Google Built-In 

12-Inch Reconfigurable Digital Driver Information Centre 

Wireless Apple CarPlay and Android Auto compatibility 

Wireless Charging Pad for convenient device charging 

Bose Premium Audio System delivering rich, immersive sound 

Multiple USB Ports throughout the cabin for device connectivity 

SiriusXM Capability for expanded entertainment options 

Wi-Fi Hotspot Capability helping keep passengers connected 

Steering Wheel-Mounted Audio and Vehicle Controls for added convenience 

Safety & Driver Assistance 

GMC Pro Safety Suite enhancing driver awareness and confidence 

Adaptive Cruise Control helping maintain a selected following distance 

Forward Collision Alert with Automatic Emergency Braking 

Front Pedestrian Braking for added protection in urban environments 

Lane Departure Warning helping keep you on course 

Following Distance Indicator promoting safer highway driving 

HD Surround Vision providing a comprehensive view around the truck 

Front & Rear Park Assist simplifying parking and maneuvering 

Rear Cross Traffic Alert for added confidence when reversing 

Trailer Side Blind Zone Alert helping monitor adjacent lanes while towing 

Safety Alert Seat providing directional safety notifications 

IntelliBeam Automatic High Beams adapting to traffic conditions 

Teen Driver Technology and Buckle-to-Drive features promoting responsible driving habits 

Exterior Styling & Utility 

Exterior Colour: Sterling Metallic a sophisticated finish that perfectly complements the Sierra HDs bold design 

20-Inch Bright Face Aluminum Wheels with Dark Painted Pockets creating a premium and commanding stance 

Chrome Front and Rear Bumpers enhancing upscale appeal 

Chrome Mirror Caps and Chrome Door Handles for refined styling 

Chrome Assist Steps providing easy cabin access 

LED Headlamps, LED Fog Lamps, and LED Roof Marker Lamps for exceptional visibility 

Rain-Sensing Windshield Wipers automatically adapting to changing weather 

Heated Power-Adjustable Trailering Mirrors with Auto-Dimming Function 

EZ Lift Power Lock & Release Tailgate simplifying cargo access 

Black Front Recovery Hooks adding functionality and rugged appeal 

CornerStep Rear Bumper improving bed accessibility 

Whether youre hauling heavy equipment, towing a large RV, or tackling demanding workdays, the 2026 GMC Sierra 3500HD SLT delivers uncompromising diesel power, advanced towing technology, and premium comfort. Its the perfect combination of heavy-duty capability, intelligent innovation, and refined GMC craftsmanship. 

 



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 airbagTeen 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 hitchingTire 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'sForward 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 onlyHD Rear Vision Camera (Removed with (UV2) HD Surround Vision.)Rear 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 lightingBuckle 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 EquipmentSeat adjuster, driver 10-way power including lumbarSeat adjuster, passenger 10-way power including lumbarSeating, heated driver and front outboard passengerDriver memory, recalls driver "presets" for power driver seat and outside mirrorsFloor 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 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-dimmingAir conditioning, dual-zone automatic climate controlCruise control, steering wheel-mountedSteering column, manual Tilt-Wheel and telescopingUSB Ports, 2, Charge/Data ports located on instrument panelSteering wheel, wrappedAir vents, rearDriver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital displayFloor mats, carpeted front (Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)Floor mats, carpeted rear (Deleted when LPO floor liners are ordered or (BKF) Premium Floor Liners are ordered.)Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mountedGMC Premium information Display- 13.4" diagonal Multicolour touch screenKeyless Open and Start includes remote keyless entryUSB ports, (2) charge-only, rearSeat, 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)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.)Seats, front 40/20/40 split-bench with covered armrest storage and under-seat storage (lockable) (Not available with (PCY) SLT Convenience Package or (PDB) SLT Premium Package.)Seat trim, Perforated Leather-appointed front outboard seating positionsExterior EquipmentSingle 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-tintedDoor handles, chromeTailgate and bed rail protection caps, topBumper, front chrome lowerBumper, rear chrome with bumper CornerStepsTailgate, standardLamps, 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 sideIntelliBeam, 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 lightTires, LT275/70R18E all-terrain, blackwall (Requires single rear wheels.)Headlamps, Animated LED projectors, LED turn signals and Daytime Running LampsWheelhouse liners, rear (Not available with dual rear wheel models.)Wheels, 18" (45.7 cm) machined aluminum wheel with Dark Grey metallic accents (Requires single rear wheels.)Cargo tie downs (12), fixed, rated at 500 lbs per cornerTire, spare LT275/70R18 all-terrain, blackwall (Included and only available with (QF6) LT275/70R18E all-terrain, blackwall tires or (QF9) LT275/65R20 all-terrain, blackwall tires with (E63) pickup bed models.)Grille, Chrome surround with Chrome insert barsEntertainment EquipmentBluetooth for phone connectivity to vehicle infotainment systemAudio system feature, 6-speaker system,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 phones.Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)SiriusXM 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 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 stepRecovery hooks, front, frame-mounted, BlackSuspension Package (Not available with (X31) Off-Road Package.)Push Button StartAir filter, heavy-dutyAuto-locking rear differentialCapless 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.)Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigueTransmission, 10-Speed automaticOther EquipmentTrailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance (Deleted when (ZW9) pickup bed delete is ordered.)Sierra 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