2025 GMC Sierra 3500HD

The 2025 GMC Sierra 3500HD Denali Crew Cab Standard Box 4-Wheel Drive is a premium, heavy-duty pickup truck that offers a powerful combination of performance, luxury, and capability. The Denali trim is the top-tier offering from GMC, designed for those who require both exceptional towing performance and a refined driving experience. This truck is ideal for demanding tasks such as towing, hauling, and off-road driving while providing a comfortable and tech-savvy cabin.

Performance and Powertrain:

• Engine Options: The 2025 Sierra 3500HD Denali offers two robust engine options to cater to a wide range of needs:

  • 6.6L V8 Gas Engine: This engine generates 401 horsepower and 464 lb-ft of torque, providing strong performance for daily driving and light towing tasks. It is paired with a 6-speed automatic transmission.

  • 6.6L Duramax V8 Turbo-Diesel Engine: For those who need even more power and towing capacity, the Duramax diesel engine produces an impressive 445 horsepower and 910 lb-ft of torque. This engine is mated to an Allison 10-speed automatic transmission, offering smoother shifts and optimized performance for towing and hauling.

• Towing Capacity: With the Duramax diesel engine, the 2025 Sierra 3500HD Denali can tow up to 36,000 pounds when properly equipped, making it one of the most capable trucks in its class. This makes it ideal for hauling large trailers, heavy equipment, or other substantial loads.

• Payload Capacity: The truck offers impressive payload capacity of up to 7,442 pounds, making it suitable for carrying heavy loads in the truck bed.

• 4-Wheel Drive 4WD : The 4WD system comes standard in the Denali trim, ensuring excellent traction and stability in a variety of road conditions, from slick streets to off-road terrain. The system is designed to provide superior performance in challenging conditions, enhancing the trucks capability whether towing, off-roading, or navigating through inclement weather.

• Suspension and Handling: The Sierra 3500HD Denali comes with an advanced independent front suspension and heavy-duty rear suspension, ensuring a smooth and controlled ride even under heavy loads. The Magnetic Ride Control suspension system, available on the Denali trim, offers an enhanced, adjustable ride quality by automatically adjusting shock absorbers based on road conditions and driving style.

Exterior Design:

• Denali Styling: The 2025 Sierra 3500HD Denali has a distinctive and premium exterior design that sets it apart from other heavy-duty trucks. The front features a bold chrome grille, LED headlights, and signature LED daytime running lights, all designed to give the truck a powerful presence on the road.

• Chrome Accents and Detailing: The Denali trim includes extensive chrome accents, including the grille, door handles, side steps, and mirror caps, contributing to the trucks refined and upscale appearance. Additionally, the Denali badge on the grille and tailgate signifies its top-tier status.

• Wheels and Tires: The Sierra 3500HD Denali comes equipped with 20-inch polished aluminum wheels as standard. These wheels are paired with Goodyear Wrangler all-terrain tires, optimized for both on-road and off-road performance.

• Bed and Tailgate: The truck features a 6.75-foot standard box, offering ample cargo space for hauling large items. The MultiPro tailgate comes standard on the Denali, which provides multiple functions, including a step for easy bed access, a work surface, and a convenient load stop for larger items.

Interior and Comfort:

• Seating Capacity and Materials: The 2025 Sierra 3500HD Denali Crew Cab offers seating for up to 5 passengers in a spacious and luxurious cabin. The Denali trim features premium leather upholstery, with options for heated and ventilated front seats, and heated rear seats for optimal comfort in all climates. The seats are designed for long-distance comfort and are fully adjustable to meet the needs of different drivers and passengers.

• Driver-Centric Cabin: The interior of the Sierra 3500HD Denali is designed for convenience and ease of use. The cabin features a large 12.3-inch digital driver display, providing clear, customizable information about the trucks performance, fuel economy, and towing data. The 8-inch or optional 13.4-inch touchscreen infotainment system integrates seamlessly with the drivers needs.

• Infotainment and Technology: The 2025 Sierra 3500HD Denali comes standard with Chevrolets Infotainment 3 Premium System, which includes:

  • Apple CarPlay and Android Auto integration for seamless smartphone connectivity.

  • SiriusXM satellite radio for entertainment options.

  • Navigation system with real-time traffic and route guidance.

  • Wireless charging pad for convenient device charging.

• Bose Premium Sound System: The Sierra 3500HD Denali offers a Bose 7-speaker premium sound system, delivering high-quality sound throughout the cabin for an elevated driving experience.

• Climate Control: Dual-zone automatic climate control is standard, ensuring that both the driver and passengers enjoy a comfortable cabin temperature. The available heated and ventilated seats add further comfort for extreme weather conditions.

Safety and Driver Assistance Features:

• Standard Safety Features: The 2025 Sierra 3500HD Denali comes with an array of standard driver-assistance features, including:

  • Forward Collision Alert

  • Automatic Emergency Braking

  • Lane Departure Warning

  • Lane Keep Assist

  • Rearview Camera with hitch guidance for easy trailer hookups

  • Rear Parking Sensors

  • Trailer Sway Control for safer towing

• Optional Safety Features: The Sierra 3500HD Denali offers additional optional safety features, including:

  • Adaptive Cruise Control

  • Blind Spot Monitoring

  • Rear Cross Traffic Alert

  • Front and Rear Automatic Braking for added safety during low-speed maneuvers

Towing and Trailering Technology:

The 2025 Sierra 3500HD Denali is designed for heavy-duty towing and hauling, offering a range of features to assist with trailering, such as:

• Trailer Brake Controller

• Integrated Trailer Camera System for enhanced visibility when towing

• ProGrade Trailering System with up to 15 different camera views to provide a clear view of the trailer and the trucks surroundings

• Tow/Haul Mode and Hill Descent Control for improved towing performance on steep grades

The 2025 GMC Sierra 3500HD Denali Crew Cab Standard Box 4-Wheel Drive is a luxurious and capable heavy-duty pickup truck that is built to handle the toughest jobs while offering a premium, refined driving experience. With powerful engine options, best-in-class towing capacity, and a well-appointed cabin, the Sierra 3500HD Denali is an excellent choice for those who need both performance and comfort. Whether youre hauling large loads, towing trailers, or navigating rough terrain, this truck is equipped to meet the demands of any job while providing advanced technology and safety features.

Engine: 8 Cylinder Engine 6.6L

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
• USB Ports, 2, Charge/Data ports located inside centre console
• 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.)

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
• Bed 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 corner
• Grille, Signature Chrome Denali grille

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
• SiriusXM 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 Subscription

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
• Transmission, Allison 10-Speed automatic
• 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.)
• 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 fatigue

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.)