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Used 2026 GMCSierra 3500 HD Denali Ultimate

  • Diesel
On the Lot
at Dennis Dillon GMC
Location Details
    Exterior Color
    Onyx Black
    Interior Color
    Alpine Umber, Full Grain Leather seating surfaces
    Odometer
    803 miles
    Transmission
    Automatic
    Drivetrain
    4WD
    Engine
    6.6L Duramax Turbo-Diesel V8 engine
    VIN
    1GT4UYEY9TF168286
    Stock Number
    BC1507
    GMC Sierra 3500 HD

    Included Packages & Accessories

    Detailed Specifications

    • Max seating capacity: 5
    • Fuel System: Direct Injection
    • Fuel tank capacity: 36 gal
    • Horsepower: 470
    • Towing capacity: 20000 lbs
    • 13.4" diagonal GMC Premium Infotainment System with Google built-in:
      • 13.4" diagonal GMC Premium Infotainment System with Google built-in, includes multi-touch display, AM/FM/SiriusXM1 radio capable
      • Bluetooth®2 streaming audio for music and select phones
      • Wireless Apple CarPlay™ capability for compatible phones3
      • Wireless Android Auto™ capability for compatible phones4
      • Customize and manage entertainment and vehicle feature setting
      • Use, control and manage select smartphone apps through the Infotainment system
      • Voice-activated technology for phone
    • Bluetooth®:
      • Pair your compatible mobile phone to your vehicle's infotainment system1
      • Place and receive hands-free phone calls
      • Store your phone's contact list in the system to place an outgoing call quickly using the touch-screen display or voice command system
      • With streaming audio capability, you can listen to files stored on your phone or Bluetooth digital media device
    • Bose Premium Series with 12-speaker system with CenterPoint:
      • 12-speakers with Richbass® woofer
      • Bose is renowned for expert sound engineering and high-quality audio and with premium speakers positioned throughout the cabin
    • SiriusXM with 360L Trial Subscription:
      • With your trial subscription, new GM vehicles equipped with SiriusXM with 360L advance in-car technology will bring you closer to your favorite stars, artists, creators, hosts and athletes1
      • SiriusXM with 360L transforms your ride with our most extensive and personalized radio experience on the road that lets you enjoy ad-free music, talk and news, live sports, comedy, podcasts and more
      • Experience SiriusXM wherever you go in your vehicle and on the SiriusXM app with personalization features to make discovering your perfect entertainment easier than ever before
    • Wi-Fi® Hotspot capable:
      • Terms and limitations apply. See onstar.com or dealer for details.
      • May require additional optional equipment
    • Wireless phone projection:
      • For Apple CarPlay™1 and Android Auto™2
    • 18" LT235/80R18 all-terrain, blackwall tires
    • 18" LT235/80R18 blackwall all-terrain spare tire
    • 18" Polished forged aluminum wheels:
      • Denali includes "Denali" center caps.
    • Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
    • Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
    • Body-color front bumper
    • Body-color rear bumper:
      • With integrated CornerSteps
    • Cargo bed LED lighting:
      • Provides light to find cargo in the bed
      • May require additional optional equipment
    • Cargo tie-downs:
      • 12-fixed rated at 500 lbs. per corner
    • Cargo tie-downs (set of 4)
    • Chrome door handles
    • Chrome mirror caps
    • CornerStep rear bumper:
      • Helps make it easier to get into and out of the pickup bed
      • Located at each end of the rear bumper
      • Textured step pads to help provide secure footing
    • Deep-tinted glass:
      • Provides added protection from sun and glare
    • Dual Rear wheelhouse liners
    • Front license plate bracket:
      • Front bracket is included if displaying a front license plate is required in your state
    • GMC MultiPro Tailgate:
      • Six function tailgate designed to help improve loading, unloading and accessing the cargo box
      • Hitch area lighting
      • Power lock and release
      • May require additional optional equipment
    • GMC MultiPro tailgate Step Lights:
      • May require additional optional equipment
    • IntelliBeam:
      • At speeds above 25 mph, can automatically turn vehicle's high beams on and off according to surrounding traffic conditions1
    • LED fog lamps
    • MultiPro™ Audio System by Kicker:
      • A weatherproof audio package that fits the MultiPro™ exclusively. Bluetooth® sound streams from connected devices to the 2-channel, 100 watt, 50 watts RMS per-channel Tailgate Sound System. The illuminated display puts the user in charge of the programming track, volume and source
      • System operation that is completely independent of the interior audiosystem
      • Bluetooth®1 compatibility for wireless playback
      • 3.5mm and USB inputs for audio playbacks
      • A custom ABS baffle with full gasket sealing
      • A weatherproof amplifier hidden in the tailgate
    • Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass:
      • Chrome mirror caps
      • AT4 features high gloss Black mirror caps
      • Power folding/extending
      • Lower convex mirrors
      • Heated upper glass
      • Integrated turn signal indicators
      • Puddle lamps
      • Perimeter lighting
      • Auxiliary lighting
      • Extends 3.31-inches
    • Power sliding rear window with rear defogger:
      • Utilizes a warming grid to remove fog or frost from the rear window
      • The window switch is conveniently located in the overhead console for easy 1-touch operation
      • May require additional optional equipment
    • Power sunroof:
      • Opens over the first row at the push of a button
      • Retracts into the roof
      • Offers tilt and slide features with express-open and -close
      • May require additional optional equipment
    • Rainsense automatic wipers:
      • When turned on, will automatically clear the windshield when sensors detect varying degrees of precipitation on the windshield
    • Side Bed Step:
      • Black textured step pads help provide secure footing
      • Integrated on forward portion of outer bed on driver and passenger side to provide ease of access to forward portion of the bed
    • Smoked Amber LED roof marker lamps:
      • Roof-mounted lamps near the front of the cab
    • Spare tire carrier lock:
      • Helps keep spare tire secure
    • Spray-on bedliner:
      • Provides a Black, textured, non-skid surface that helps protect the bed and minimizes cargo shifting
      • Covers the entire bed surface below side rails, front box top rail, gauge hole plugs and tie-downs
      • Chemically bonded, the sprayed-on liner permanently bonds to the truck bed, providing a watertight seal
      • Does not include spray-on liner on tailgate due to Black composite inner panel
      • Includes GMC logo on all trims except PRO
    • Stainless-steel beltline moldings
    • Tailgate and bed rail protection caps
    • Tailgate with EZ Lift assist, power lock & release:
      • Hitch area lighting
      • May require additional optional equipment
    • Winter Grille Cover:
      • May require additional optional equipment
    • 12.3" diagonal color Driver Information Center:
      • Includes driver personalization, warning messages and vehicle information
      • Replaces traditional analog gauges with fully reconfigurable high definition cluster layout
      • High definition display provides crisp, premium appearance
    • 120-volt box-mounted power outlet:
      • 3-prong auxiliary household-style outlet
      • Located in the pickup bed
      • May require additional optional equipment
    • 120-volt power outlet:
      • 3-prong auxiliary household-style outlet
      • Located on the instrument panel
      • Makes it convenient for powering laptops, phone chargers and other electronic devices
      • May require additional optional equipment
    • 13.4" diagonal GMC Premium Infotainment System with Google built-in:
      • 13.4" diagonal GMC Premium Infotainment System with Google built-in, includes multi-touch display, AM/FM/SiriusXM1 radio capable
      • Bluetooth®2 streaming audio for music and select phones
      • Wireless Apple CarPlay™ capability for compatible phones3
      • Wireless Android Auto™ capability for compatible phones4
      • Customize and manage entertainment and vehicle feature setting
      • Use, control and manage select smartphone apps through the Infotainment system
      • Voice-activated technology for phone
    • 16-way power driver seat with power lumbar and massage
    • 16-way power passenger seat with power lumbar and massage
    • 3 Years SiriusXM:
      • Includes ad-free music, plus talk, sports, comedy, news, podcasts and more1
      • Enjoy channels curated by DJs, personalities, and tastemakers
      • Access all your favorite entertainment to enjoy in-vehicle and on the SiriusXM app
    • Adaptive Cruise Control:
      • Automatically follows a detected vehicle ahead at a driver-selected following gap1
      • If no vehicle is detected in your path, works like regular cruise control
      • You can always override the feature and take control
      • Adaptive Cruise Control is compatible with Trailering. It is important to ensure your trailer has functioning brakes while trailering with heavier loads. Read your Owner's Manual to review Trailer Brake requirements and to learn more about the limitations of this system.
    • Assist handles:
      • Front A-pillar mounted for Driver and Passenger
      • Rear B-pillar mounted
    • Carpeted floor covering:
      • Color-keyed to match the interior
    • Compass:
      • Located in instrument cluster
    • Driver memory:
      • Press memory button 1 or 2 to program and recall preferences
      • May require additional optional equipment
    • Dual-zone automatic climate control:
      • Automatically maintains the selected temperatures for both the driver and front passenger
      • Allows individual climate settings for both driver and front passenger
      • Driver and front passenger can choose a temperature up to 30 degrees difference
      • May require additional optional equipment
    • Front bucket seats:
      • May require additional optional equipment
    • Front carpeted floor mats:
      • Helps protect your interior from road debris and the elements
      • Color-keyed to match the interior
      • Denali models feature unique premium tufted carpeting
    • Front center console:
      • Includes reconfigurable feature with cupholders, cell phone storage, power cord management and file holder capacity
      • May require additional optional equipment
    • Head-Up Display:
      • Projects vehicle information onto the windshield low in the driver's line of sight to help you keep your eyes on the road1
      • Multi-color 15" diagonal Head-Up Display
      • Can select key vehicle information to display including an off-road inclinometer
      • Adjustable vertical position and brightness of the display
      • May require additional optional equipment
    • Heated driver and front outboard passenger seats:
      • Separate buttons on the climate control panel allow you to choose from 3 levels of warmth
      • At the touch of a button you can warm the cushions and seatbacks with multilevel temperature control
      • Individually controlled
      • Seats can be programmed to automatically warm up when it's cold out
      • May require additional optional equipment
    • Heated rear outboard seats:
      • At the touch of a button you can warm the cushions
      • Provide comfort in cold weather for passengers in the rear outboard seating positions
      • Passengers can manage heat settings with their own controls
      • May require additional optional equipment
    • Heated steering wheel:
      • With the press of a button the steering wheel quickly heats up to provide additional comfort on a cold day
      • May require additional optional equipment
    • In-Vehicle Trailering App:
      • Checklist1
      • Trailer maintenance reminders
      • Trailer security alerts
      • Trailer mileage
      • Tow/haul reminder
      • Trailer electrical diagnostics
      • Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed
    • Keyless Open and Start:
      • With the key fob in your possession, lock and unlock your car's doors by pressing the button on a front exterior door handle, increasing convenience
      • Lockout protection helps you avoid locking keys in the vehicle
    • Leather-wrapped steering wheel:
      • Includes controls for audio, phone, Driver Information Center and cruise control
    • Manual tilt and telescoping steering column:
      • Allows the driver to adjust the steering wheel up or down, and the steering column forward or back
      • May require additional optional equipment
    • Outside temperature display:
      • Located in infotainment display
    • Power door locks:
      • Allows you to lock and unlock doors easily whether it's from the driver or front passenger seat or from outside using the key fob (when equipped)
    • Power windows with driver and front passenger express-up/down:
      • Quickly raises the window or lowers it with the touch of a button
      • If obstruction is detected, the anti-pinch feature will auto-reverse
    • Power windows with driver express-up/down:
      • Quickly raises the window or lowers it with the touch of a button
      • If an obstruction is detected, the anti-pinch feature will auto-reverse
    • Power windows with rear express-down
    • Rear Camera Mirror:
      • Uses a camera to provide you with the option of using a wide and less obstructed view behind your vehicle while driving instead of a traditional rearview mirror1
      • The feature also allows brightness, vertical tilt and zoom adjustments
      • May require additional optional equipment
    • Rear air vents:
      • Provides cabin comfort for rear occupants
    • Rear carpeted floor mats:
      • Helps protect your interior from road debris and the elements
      • Color-keyed to match the interior
      • Denali models feature unique premium tufted carpeting
    • Rear window defogger:
      • Utilizes a warming grid to help remove fog or frost from the rear window
    • Remote Start:
      • Start your vehicle remotely and step into a comfortably warmed or cooled vehicle, depending on the weather and your preset preferences
      • Locks doors and turns on parking lamps while the engine is running
      • Activates the climate control system
    • Steering-wheel mounted controls:
      • Allow the driver to easily operate the audio system and phone interface controls
      • May require additional optional equipment
    • Theft-deterrent unauthorized entry system:
      • Sounds the horn and flashes the turn signals when someone attempts to open the vehicle without the proper key or remote transmitter
      • Helps deter unauthorized entry, helping to protect your vehicle
      • May require additional optional equipment
    • USB ports:
      • (2) Charge ports located on rear of console1
    • USB ports:
      • (2) Data/charge ports located inside center console1
    • USB ports:
      • (2) First row, located on console1
    • Universal Home Remote:
      • 3-channel programmable
      • Conveniently activates compatible devices such as garage door openers, security systems, and home automation devices from inside your vehicle
      • May require additional optional equipment
    • Up-level rear seat with storage package:
      • 60/40 Full-length folding bench seat
      • Seatback storage on left and right side
      • Center fold out armrest with 2 cupholders
      • Underseat storage (full cab width)
    • Upfitter switches:
      • Program electrical components such as exterior lighting, snow removal equipment or other features to turn on and off at the flip of a switch
      • Allows the driver to operate upfitter-installed equipment conveniently from inside the cab
      • Provides 3-30 amp and 2 20 amp configurable circuits to facilitate installation of aftermarket electrical accessories by the dealer or upfitter1 at customer expense
      • Installation instructions and technical assistance available at www.gmupfitter.com
      • May require additional optional equipment
    • Ventilated driver and front passenger seats:
      • Separate buttons on the climate control panel allow you to choose from 3 levels of fan circulation
      • Individually controlled
      • Cooling feature includes both seatbacks and cushions
      • May require additional optional equipment
    • Wireless Charging:
      • Uses induction technology for select portable electronic devices1
      • Convenient charging location on the top of the center console
      • Customers can charge their smartphones while they drive without connecting to any cables
      • May require additional optional equipment
    • 10-speed automatic transmission:
      • Tow/Haul mode reduces shift cycling for better control and improved cooling when towing or hauling heavy loads
      • Electronically controlled with overdrive
      • Auto Grade Braking that automatically downshifts when needed to enable engine braking, helping to slow the vehicle on downhill grades and reduce brake wear (operates in Tow/Haul mode)
      • May require additional optional equipment
    • 14,000 lbs. GVWR:
      • When properly equipped; includes weight of vehicle, passengers, cargo and equipment
    • 3.42 rear axle ratio:
      • Requires a diesel engine
    • 4-wheel antilock disc brakes:
      • Help reduce wheel lockup and maintain steering control during hard braking on most slippery surfaces
      • DuraLife™ brake rotors feature a hardened surface to reduce corrosion and provide quieter braking with less vibration. DuraLife™ rotors are hardened and strengthened during the manufacturing process
      • Brake system features a corrosion-fighting process called Ferritic Nitro-Carburizing (FNC) which can double rotor life expectancy and reduce or minimize rust over non-FNC coated rotors
    • 6.6L Duramax Turbo-Diesel V8 engine:
      • 470 hp [350.5 kW] @ 2800 rpm
      • 975 lb-ft of torque [1322 Nm] @ 1600 rpm
      • 3.42 rear axle ratio
      • Exhaust brake
      • Engine block heater
      • Capped fuel fill
      • Paired with an Allison® 10-speed automatic transmission
      • Diesel Exhaust Fluid (DEF) fill located in fuel door
      • Engine after run feature for cooling performance
      • May require additional optional equipment
    • Air filtration monitoring:
      • Alerts the driver when the engine air filter needs replacement
    • Automatic locking rear differential:
      • When the differential senses a significant difference in wheel speed, it locks to turn both rear wheels in unison for added traction
      • The Eaton® Locker senses a difference in wheel speed of approximately 100 rpm
    • Autotrac® 2-speed transfer case with push button controls:
      • 4-button control 2WD, Auto, 4WD, 4WD LO
      • 2WD High for most on-road and highway situations
      • 4WD High for snowy or wet roads when added traction is needed
      • 4WD Low for deep sand, mud or snow to provide maximum torque to all 4 wheels
      • When in AUTO mode, remains in 2WD mode until the system detects wheel slippage
        • Automatically engages 4WD until traction is regained
      • May require additional optional equipment
    • Brake pad wear indicator
    • Capped fuel fill:
      • Requires diesel engine or pickup bed delete
    • Chrome vertical recovery hooks:
      • Two front frame-mounted1
    • Diesel exhaust brake:
      • Reduces the amount of conventional braking needed while towing a heavy trailer or driving downhill
      • Uses the variable vanes in the turbocharger to smoothly and quietly create additional back pressure in the engine to help slow the vehicle
      • Works with the transmission's Tow/Haul mode and Auto Grade Braking to help the driver maintain the desired speed even on long, steep downgrades
      • Switch activated
      • May require additional optional equipment
    • Digital Variable Steering Assist:
      • This system automatically adjusts steering based on speed, road conditions, and other inputs to help reduce driver fatigue
    • Dual, 220 amp primary and 170 auxiliary amp alternators:
      • May require additional optional equipment
    • Engine block heater:
      • Helps ease cold weather starts
      • Heats the engine and engine block fluids
    • External auxiliary transmission oil cooler:
      • Heavy-duty air-to-oil cooler
      • Helps provides optimal transmission performance even when operating under a heavy load or towing a trailer
      • May require additional optional equipment
    • External engine oil cooler:
      • Heavy-duty air-to-oil cooler
      • Helps extend engine oil life under heavy loads
    • Fully boxed frame:
      • Hydroformed front section
      • High-strength steel
    • Gooseneck / 5th Wheel Prep Package:
      • Hitch platform to accept Gooseneck or 5th wheel hitch
      • Hitch platform with tray to accept ball and stamped box holes with caps installed
      • Box mounted 7-pin trailer harness
      • May require additional optional equipment
    • Heavy-Duty Air Filter:
      • Thick construction helps to trap more dirt before it can enter the air intake
    • Heavy-duty 730 cold-cranking amps battery:
      • 70 Amp-hr
      • Maintenance-free with rundown protection and retained accessory power
    • High idle switch:
      • Runs the engine in High Idle mode, holding the engine at approximately 1200 rpm
      • Operates using the cruise control buttons on the steering wheel
      • High Idle mode is deactivated when you turn off the truck or before you drive off
      • May require additional optional equipment
    • Integrated trailer brake controller:
      • Integrated with the antilock brake system (ABS)
      • Helps provide measured brake force signaling to electric-controlled trailer brake systems
      • Trailer gain and output are displayed in the Driver Information Center
    • Pickup bed:
      • Roll-formed high-strength steel
      • Includes bed assist step
    • Push Button Start
    • Skid plates:
      • Help protect the front underbody, oil pan and transfer case
      • May require additional optional equipment
    • Suspension Package:
      • Designed to help maintain handling and ride quality while towing a trailer or carrying a load
    • ProGrade Trailering System:
      • Hitch Guidance with Hitch View
      • In-vehicle Trailering App
    • Sierra HD Pro Safety:
      • Forward Collision Alert1
      • Following Distance Indicator1
      • Front Pedestrian Braking1
      • IntelliBeam
      • Lane Departure Warning1
      • Buckle to Drive
      • Automatic Emergency Braking1
    • Technology Package:
      • Rear Camera Mirror1
      • Multi-color 15" Diagonal Head-Up Display
      • AT4 Preferred Package on AT4
      • May require additional optional equipment
    • Trailering Package:
      • Trailer hitch1
      • Trailering hitch platform
      • Includes a 2.5" receiver hitch (with 2" insert), 4-pin and 7-pin connectors
      • 7-wire electrical harness and 7-pin sealed connector for connecting your trailer's lights and brakes to your vehicle
      • Hitch Guidance2
      • May require additional optional equipment
    • 3 Years OnStar One:
      • Safety Services, Wi-Fi, and In-Vehicle Apps, all connected by OnStar1
      • Info at OnStar.com/plans
    • Trailering Information Label:
      • Provides max trailer ratings for tongue weight, conventional, gooseneck hitch and 5th wheel hitch
    • LED Daytime Running Lamps
    • Signature LED Daytime Running Lamps
    • 6 airbags:
      • Dual-stage frontal airbags for driver and front outboard passenger1
      • Seat-mounted side-impact airbags for driver and front outboard passenger1
      • Head-curtain airbags for outboard seating positions1
      • Includes front outboard Passenger Sensing System for frontal outboard passenger airbag and illuminates a status light that indicates whether the airbag is on or off1
    • Bed View Camera:
      • Camera in the Center High Mount Stop Lamp (CHMSL) provides an elevated view of the truck bed from the back of the cab1
      • Allows driver to see inside the cargo bed on the infotainment display to help with 5th wheel or gooseneck hitching and to check cargo
      • Includes 2 Trailer Camera Provisions
      • May require additional optional equipment
    • Buckle to Drive:
      • Helps remind the driver to buckle their seat belt before driving by preventing the vehicle from being shifted out of PARK temporarily when the driver's seat belt is not buckled
      • The feature also reminds the front passenger to buckle up, if equipped
    • Following Distance Indicator:
      • Displays the following time in seconds between your vehicle and a detected vehicle in front of you1
      • Designed to help you maintain a safe following distance
    • Forward Collision Alert:
      • Warns you if it detects a potential collision with a detected vehicle you're following so you can take action1
      • Can also provide a tailgating alert if you're following a vehicle much too closely
    • Front Pedestrian Braking:
      • At speeds between 5 and 50 mph, can help you avoid or reduce the severity of a collision with a pedestrian it detects directly in front of you1
      • Provides pedestrian alerts and can automatically provide hard emergency braking or enhance driver's hard braking
      • Limited nighttime and low visibility performance
    • Front and Rear Park Assist:
      • Provides alerts of nearby detected vehicles and objects in front of or behind your vehicle1
      • These can help you park and avoid collisions
      • May require additional optional equipment
    • HD Surround Vision:
      • Provides selectable digital camera views of the area around your vehicle1
      • Can help you park or avoid vehicles and objects
      • You can also display a guideline to show where your vehicle is heading
      • Tailgate must be in the raised position for the HD Rear Vision Camera to operate properly
      • Requires Auxiliary Trailer Camera if one of the following camera views is desired: Transparent Trailer, Rear Trailer View, Picture-in-Picture or Inside Trailer View
      • May require additional optional equipment
    • Hitch Guidance:
      • When in Reverse, displays a centered guideline on the Rear Vision Camera view1
      • Can help you line up the hitch to your trailer
      • When driving, lets you check the trailer using Rear Vision Camera view
    • Hitch View:
      • Shows a close-up view of the trailer hitch1
      • In Reverse, the view can be used to line up your hitch to your trailer
      • When driving, the view can be used to check your trailer hitch
      • Shifting to Park automatically engages the Electric Parking Brake (if equipped)
      • May require additional optional equipment
    • Lane Departure Warning:
      • Alerts you when it detects that you are unintentionally drifting out of detected lane lines1
      • System alerts do not occur if you're using your turn signal, or it detects you may be intentionally leaving your lane
    • OnStar Basics:
      • Drive confidently with core OnStar services including1
        • Remote commands
        • Built-in voice assistance
        • Real-time traffic and navigation
        • Automatic Crash Response to help if you're in need
    • OnStar® services capable:
      • See onstar.com for details and limitations. Services vary by model. Service plan required.
    • Rear Cross Traffic Alert:
      • When in Reverse, warns you of detected vehicles crossing behind you1
      • May require additional optional equipment
    • Rear Seat Belt Indicator
    • Rear Seat Reminder:
      • Helps to remind the driver to check the back seat(s) before leaving the vehicle1
      • Activates when rear doors are opened and closed up to 10 minutes before or anytime while your vehicle is on
      • Under certain conditions, once the vehicle is switched off, designed to sound audible chimes and display a visual message within the driver display
      • Activates only once each time the vehicle is turned on and off, and would require re-activation on a second trip
    • Safety Alert Seat:
      • Uses left-, right- or both-side driver seat vibration pulses to help you detect and identify the direction of potential crashes1
      • You can also switch to beeping crash avoidance alerts
      • May require additional optional equipment
    • Seat Belt Adjustable Guide Loops:
      • Front row only
    • Teen Driver:
      • Helps encourage safe driving habits for teens by providing an in-vehicle report card1
      • Activates certain safety systems, if equipped, when a Teen Driver-designated key fob is used
      • Mutes the radio until the front-seat occupants fasten their seat belts
    • Tire Pressure Monitoring System with Tire Fill Alert:
      • Monitors tire pressure and alerts of an under-inflated condition in one or more of the tires1
      • Provides visual and audible alerts outside the vehicle when inflating an under inflated tire to the recommended tire pressure
    • Trailer Side Blind Zone Alert:
      • Provides visual side-mirror alerts when a moving vehicle is detected in a side blind zone that is extended to trailer lengths1
      • May require additional optional equipment
    • Trailer Tire Pressure and Temperature Sensors:
      • Set of 4 sensors
      • Sensors will be shipped loose with the truck and will need to be installed on trailer by customer
      • Additional or replacement sensors are available as GM Accessory
      • System is capable of monitoring up to 6 wheels
      • May require additional optional equipment
    • Trailering camera provisions:
      • Includes connector for accessory wiring harness
    • Automatic Emergency Braking:
      • Can help you avoid or reduce the severity of a collision with a detected vehicle you're following using camera technology1
      • Can automatically provide hard emergency braking or enhance your hard braking
      • Works at speeds between 5 and 50 mph
    • StabiliTrak, electronic stability control system with traction control:
      • Automatically helps enhance control, particularly during emergency maneuvers, by adjusting the brakes and engine torque to help you stay on your intended path
      • Activates when vehicle sensors detect a difference between the driver's intended path and the direction the vehicle is actually travelling
      • Includes Traction Control that detects wheel slippage and applies brake pressure and/or reduces engine power to help the driver maintain control when accelerating on wet or snow-covered roads
      • Includes Brake Assist which detects rapid brake pedal applications due to emergency braking situations and provides additional braking via the Antilock Brake System (ABS) module
      • Includes Trailer Sway Control
      • Hill Start Assist

    Dealer Notes

    Experience the pinnacle of power and refinement in the 2026 GMC Sierra 3500HD Denali Ultimate. This heavy-duty pickup is engineered to conquer any task with its robust Duramax 6.6L V8 Turbodiesel engine and advanced 4WD capabilities. Elevate your drive with a host of premium features that deliver unparalleled comfort, convenience, and style.

    - DENNIS DILLON DEAL
    - LPO, CARGO TIE-DOWN RINGS, SET OF 4 (dealer-installed)
    - LPO, GMC MULTIPRO TAILGATE STEP LIGHTS (dealer-installed)
    - UPFITTER SWITCH KIT, (5)
    - Onyx Black
    - Black
    - ALTERNATORS, DUAL, 220-AMPS PRIMARY, 170-AMPS AUXILIARY
    - 3 YEARS SIRIUSXM
    - HIGH IDLE SWITCH
    - GOOSENECK / 5TH WHEEL PREP PACKAGE

    Indulge in the Denali Ultimate's exceptional craftsmanship, from the premium Bose audio system to the heated and ventilated leather seats. Stay connected and entertained with the advanced GMC Infotainment System, featuring a 13.4-inch diagonal high-definition display, wireless charging, and seamless smartphone integration. The Multicolor 15-inch Head-Up Display puts crucial information right in your line of sight, enhancing your driving experience.

    Tackle any terrain with confidence, thanks to the Sierra's robust 4WD system and advanced trailering technologies. The Gooseneck/5th Wheel Prep Package ensures you're ready to haul your heaviest loads, while the ProGrade Trailering System provides a suite of tools to make towing a breeze. The Trailer Camera Provisions and Trailer Side Blind Zone Alert add an extra layer of safety and convenience.

    Elevate your driving experience with the 2026 GMC Sierra 3500HD Denali Ultimate. This exceptional heavy-duty pickup combines uncompromising capability, refined luxury, and cutting-edge technology to deliver a truly remarkable driving experience. Visit our showroom today to discover the power and prestige of the Denali Ultimate.

    Family owned and operated for over 50 years!

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
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      Vehicle prices below Manufacturer's Suggested Retail Price (MSRP) include factory rebates typically applicable to Customers in the western region and discounts for program qualifying financing. (Customers from most other regions may qualify for the same rebates.) To receive the lowest listed price, Customers must qualify for additional Dealer and Manufacturer programs. Not all Customers will qualify. Prices do not include taxes, license, title, or registration fees, or the $499.00 Dealer Doc fee. Contact us for an explanation of pricing terms and conditions. Prices are subject to inventory availability, Manufacturer program availability, and Dealer program applicability. Inventory is limited and subject to prior sale. Available offers and prices usually change after month-end. We welcome all types of Trade Ins, whether they be vehicles or goods. Nothing that eats though please. We frequently confirm all information is accurate, but errors occur, so please call to confirm pricing and program applicability. Dealer is not responsible for clerical errors. **With approved credit. Terms may vary. Monthly payments are only estimates derived from the vehicle price with a 72 month term, 4.9% interest and 20% downpayment. At Dennis Dillon we are so confident in our "Guaranteed Best Pricing" we will beat any price by $500 based on the following guidelines: • Vehicles must be new and have the same MSRP. • Vehicles must be the same Year, Make, Model, and have the same equipment. • Customer must have a purchase agreement signed and dated by a sales manager from the competing dealer. • Customer information and incentive eligibility must be the same as used in the competing offer. • Deal must be finalized in the same calendar month as the date of the signed purchase agreement from the competing dealer. • Demonstrators, service loaners, commercial and government fleet vehicles, limited production vehicles, special model vehicles (determined at the Dealership's sole discretion), and vehicles with over 200 miles do not qualify for this policy. • Dennis Dillon must have the right to purchase the vehicle from the competing dealer. • This offer applies to the new vehicle price after applicable incentives, and does not include accessories, trade-allowance, or any other item affecting the final sale price. • This offer applies to the vehicle price only, and does not include accessories, protections, dealer doc fee, taxes, registration, or title fees. *Best pricing is offered at the Dealership's sole discretion and is subject to change at any time without prior notice. The Dealership reserves the right to refuse to offer best pricing at any time, to any customer, for any vehicle. Please contact the Dealership if you have questions about our best pricing policy.
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