2026 GMC Sierra 3500HD Denali 4WD Crew Cab Long Box Denali

The 2026 GMC Sierra 3500HD Denali 4WD Crew Cab Long Box combines uncompromising heavy-duty strength, premium craftsmanship, and advanced technology. Finished in Sterling Metallic with a sophisticated Jet Black interior, this commanding truck is engineered for demanding workloads while delivering first-class comfort. With its powerful Duramax diesel engine, dual rear wheels, and advanced trailering technology, the Denali is built for drivers who expect exceptional capability without sacrificing luxury. 
Performance & Capability 
Engine: 6.6L Duramax Turbo-Diesel V8 engineered for impressive torque, heavy-duty performance, and confident hauling. 

Transmission: Allison 10-speed automatic transmission for smooth, controlled power delivery. 

Drivetrain: Four-wheel drive with a two-speed transfer case for enhanced traction in changing road and terrain conditions. 

Dual Rear Wheels: Dually configuration provides added stability and confidence when towing heavy loads. 

Rear Differential: Automatic locking rear differential for improved traction when conditions become challenging. 

Exhaust Brake: Integrated diesel exhaust braking helps control speed on steep descents while towing. 

Suspension & Protection: Standard suspension package, skid plates, and all-terrain tires for dependable performance on demanding routes. 

Trailering Technology: Integrated trailer brake controller, Hitch View, Hitch Guidance, and an advanced trailering app for greater control and convenience. 

Gooseneck & Fifth-Wheel Prep: Factory-installed preparation makes this truck ready for compatible heavy-duty trailer setups. 

Winter & Weather Comfort 
Heated & Ventilated Front Seats: Personalized comfort through cold mornings and warmer afternoons. 

Heated Rear Outboard Seats: Added warmth for rear passengers during chilly Canadian winters. 

Heated Steering Wheel: Keeps your hands comfortable when temperatures drop. 

Engine Block Heater: Helps support cold-weather starting in freezing conditions. 

Dual-Zone Automatic Climate Control: Allows the driver and front passenger to select their preferred temperatures. 

Rain-Sensing Wipers & Rear Window Defogger: Help maintain visibility when weather conditions change. 

Remote Vehicle Start: Prepares the cabin before you climb inside. 

Interior Comfort & Convenience 
Premium Jet Black Interior: Refined styling paired with upscale finishes and a spacious Crew Cab layout. 

Power Front Bucket Seats: Driver and passenger power adjustments, with four-way power lumbar support for added comfort. 

Driver Memory Settings: Conveniently recalls preferred mirror settings. 

Power Sunroof: Brings natural light and an open-air feel into the cabin. 

Power Sliding Rear Window: Adds ventilation and everyday convenience. 

Wireless Charging: Keeps compatible smartphones powered without extra cables. 

13.4 GMC Infotainment Touchscreen: Features Google built-in, connected services, and intuitive access to essential functions. 

12 Digital Driver Information Display: Presents driving information in a customizable, easy-to-read format. 

15 Multicolour Head-Up Display: Projects key driving information into the drivers field of view. 

Bose Premium Audio System: Delivers rich, immersive sound throughout the cabin. 

Wireless Apple CarPlay & Android Auto: Connect compatible smartphones for convenient access to apps, calls, and music. 

Safety & Driver Assistance 
GMC Pro Safety: Includes essential driver-assistance technologies designed to support greater awareness. 

Forward Collision Alert & Automatic Emergency Braking: Help alert the driver to potential frontal collisions and assist when necessary. 

Front Pedestrian Braking: Adds awareness when pedestrians are detected ahead. 

Lane Departure Warning: Helps alert the driver when an unintended lane departure is detected. 

Adaptive Cruise Control: Helps maintain a selected following distance from detected vehicles. 

Trailer Side Blind Zone Alert: Helps monitor blind zones alongside the truck and compatible trailers. 

HD Surround Vision: Provides multiple camera views to assist with parking and manoeuvring. 

Rear Camera Mirror & Bed View Camera: Improve visibility behind the truck and into the cargo bed. 

Front & Rear Park Assist: Helps when navigating tight spaces. 

IntelliBeam Automatic High Beams: Automatically adjusts high-beam operation when appropriate. 

Exterior Styling & Utility 
Exterior Colour: Sterling Metallic a sleek, contemporary finish that complements the Denalis upscale presence. 

18 Polished Forged Aluminum Wheels: Premium wheel styling paired with an all-terrain tire setup. 

Signature LED Lighting: LED headlamps, fog lamps, and cargo bed lighting enhance visibility and functionality. 

Chrome Accents: Chrome mirror caps, door handles, and recovery hooks create a distinctive Denali appearance. 

Chrome Assist Steps: Provide convenient access to the elevated cabin. 

Spray-On Bedliner: Helps protect the cargo bed from everyday wear. 

GMC MultiPro Tailgate: Offers versatile configurations for easier loading, unloading, and accessing the bed. 

120V Bed-Mounted Power Outlet: Adds practical power access for compatible tools and equipment. 

Long Box Configuration: Provides generous cargo space for work equipment, supplies, and recreational gear. 

Dual Rear Wheels & Trailer Camera Provisions: Reinforce this trucks purpose-built design for serious towing applications. 

Whether youre hauling equipment to the jobsite, towing a large fifth-wheel trailer, or travelling across the country, the 2026 GMC Sierra 3500HD Denali Long Box delivers commanding diesel power, sophisticated comfort, and advanced trailering confidence. Its the ultimate combination of heavy-duty capability and premium GMC refinement, built to take on demanding tasks with unmistakable Denali style. 
 

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 Equipment
StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
Airbags, 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 airbag
Front and Rear Park Assist, ultrasonic
Rear Cross Traffic Alert
Teen 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 driver
Rear Seat Reminder
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
Safety Alert Seat
Trailer Side Blind Zone Alert
Tire 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/Tilt
Front 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's
HD 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 software
Forward 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 only
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 lighting
Hill 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 Provisions
Buckle 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 Equipment
Seating, heated driver and front outboard passenger
Seats, ventilated driver and front passenger
Seats, heated second row outboard seats
Driver memory, recalls driver "presets" for power driver seat and outside mirrors
Centre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
Floor covering, colour-keyed carpeting
Steering wheel, heated
Steering wheel audio controls
Exterior Temperature Display located in radio display
Compass, located in instrument cluster
Window, power front, drivers express up/down
Window, power front, passenger express up/down
Windows, power rear, express down
Door locks, power
Remote vehicle starter system
Universal Home Remote
Theft-deterrent system, unauthorized entry
Power 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 electric
Mirror, inside rearview auto-dimming
Air conditioning, dual-zone automatic climate control
Steering column, manual Tilt-Wheel and telescoping
Adaptive Cruise Control
Steering wheel, wrapped
Wireless Charging
USB Ports, 2 (first row) located on console
Air vents, rear
Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted
Seats, front bucket with centre console
GMC Premium information Display- 13.4" diagonal Multicolour touch screen
Keyless Open and Start includes remote keyless entry
USB ports, (2) charge-only, rear
Seat trim, Forge Perforated Leather seating surfaces
Seat adjuster, driver 12-way power including lumbar
Seat adjuster, passenger 12-way power including lumbar
Seat, 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.)
USB ports, 2, Charge/Data ports located inside centre console
Exterior Equipment
Tire, 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 Wheels
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
CornerStep, rear bumper
Mouldings, beltline, stainless steel
Mirrors, 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, chrome
Glass, deep-tinted
Window, power, rear sliding with rear defogger
Door handles, chrome
Tailgate and bed rail protection caps, top
Lamps, cargo area, cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
Wipers, front rain-sensing
Fog lamps, LED
Bed Step, Black integrated on forward portion of bed on driver and passenger side
Bumper, front, body-colour lower
Bumper, rear body-colour with bumper CornerSteps
IntelliBeam, 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 fob
Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
Headlamps, Animated LED projectors, LED turn signals and Daytime Running Lamps
Wheels, 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 details
Cargo tie downs (12), fixed, rated at 500 lbs per corner
Grille, Signature Chrome Denali grille
Bedliner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel)
Entertainment Equipment
Bose Sound System, premium 7-speaker system with Richbass woofer
Bluetooth for phone connectivity to vehicle infotainment system
Wireless phone projection for Apple CarPlay and Android Auto
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 Subscription
SiriusXM 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 Equipment
Engine, 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 monitoring
Transfer case, two-speed active electronic Autotrac with push button control
Four wheel drive
Cooling, external engine oil cooler
Cooling, auxiliary external transmission oil cooler
Battery, 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, integrated
Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
Brake lining wear indicator
Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
Pickup bed includes bed assist step
Push Button Start
Air filter, heavy-duty
Auto-locking rear differential
Skid Plates protect the oil pan, front axle and transfer case
Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
GVWR, 11,700 lbs. (5307 kg) with single rear wheels (Included and only available with model TK30943 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 fatigue
Transmission, 10-Speed automatic
Other Equipment
Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
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 Braking
ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
X31 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.)