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Sterling Metallic 2026 GMC Sierra 3500HD Duramax 6.6L V8 Turbodiesel
SLT 10-Speed Automatic, 4WD, Black Leather.
All Roads Lead to Simpson.
New 2026 GMCSierra 3500 HD SLT
- Exterior Color
- Sterling Metallic
- Interior Color
- Jet Black, Perforated Leather-appointed front seat
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- 6.6L Duramax Turbo-Diesel V8 engine
- VIN
- 1GT4UUEYXTF109384
- Stock Number
- 109384
Included Packages & Accessories
Detailed Specifications
- Basic: 3 Years/36,000 Miles
- Corrosion: 3 Years/36,000 Miles, Rust-Through, 6 Years/100,000 Miles
- Drivetrain: 5 Years/60,000 Miles, 3.0L & 6.0L Duramax® Turbo-Diesel engines, and certain commercial, government, and qualified fleet vehicles: 5 years/100,000 miles
- Maintenance: First Visit: 12 Months/12,000 Miles
- Roadside Assistance: 5 Years/60,000 Miles, 3.0L & 6.0L Duramax® Turbo-Diesel engines, and certain commercial, government, and qualified fleet vehicles: 5 years/100,000 miles
- Warranty: <<< Preliminary 2026 Warranty >>>
- Max seating capacity: 6
- 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
- 6-speaker audio system:
- Speakers are positioned throughout the cabin for outstanding sound quality and an enjoyable listening experience
- 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
- 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" LT275/70R18 all-terrain, blackwall spare tire:
- May require additional optional equipment
- 18" LT275/70R18 all-terrain, blackwall spare tire:
- May require additional optional equipment
- 18" LT275/70R18E all-terrain, blackwall tires
- 18" machined aluminum wheels with Dark Grey metallic accents
- 6" Chrome assist steps:
- Steps make it easier to get in and out of your vehicle
- Textured step pads help provide secure footing
- May require additional optional equipment
- Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
- Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
- 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 front bumper:
- May require additional optional equipment
- Chrome mirror caps
- Chrome rear bumper:
- With integrated CornerSteps
- May require additional optional equipment
- 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
- 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
- Hard Folding Truck Bed Cover by RealTruck Advantage
- IntelliBeam:
- At speeds above 25 mph, can automatically turn vehicle's high beams on and off according to surrounding traffic conditions
- LED fog lamps
- 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
- Rainsense automatic wipers:
- When turned on, will automatically clear the windshield when sensors detect varying degrees of precipitation on the windshield
- Rear wheelhouse liners:
- Help protect your truck's rear wheelhouse area from damage caused by dirt, rocks, mud, road salt and the weather
- May require additional optional equipment
- 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
- 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
- 10-way power driver seat with power lumbar:
- Includes 8-way power driver seat
- Includes a 2-way power lumbar control
- 10-way power front passenger seat:
- Includes 8-way power front passenger seat
- Includes a 2-way power lumbar control
- 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
- 40/20/40 split-bench front seat with under-seat storage:
- Seating for up to 3
- Driver and front passenger seatbacks recline
- Head restraints at the outboard seating positions
- Center seatback that doubles as a fold-down armrest with storage
- All-weather floor liners:
- Provides coverage for first and second-row seating
- Feature a textured, anti-slip pattern that helps trap debris and water while providing carpet coverage
- Include Brand logo
- Replaces factory floor mats
- 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
- Cruise control:
- Maintains a selected speed while driving
- Automatically disengages when the vehicle's traction control system needs to limit wheelspin on slippery surfaces or when the StabiliTrak® stability control system detects an oncoming skid
- Set and resume speed functions
- Steering-wheel mounted controls to easily maintain and manage cruising speed
- 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 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
- 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 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
- Inside rearview auto-dimming mirror:
- Automatically dims the inside rearview mirror when it senses bright light from behind
- When headlamp glare is no longer detected, the mirror returns to its normal state
- 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
- 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 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
- 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)
- Wrapped steering wheel
- 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
- 12,250 lbs. GVWR:
- When properly equipped; includes weight of vehicle, passengers, cargo and equipment
- 220-amp alternator:
- May require additional optional 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
- 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
- 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
- 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
- Suspension Package:
- Designed to help maintain handling and ride quality while towing a trailer or carrying a load
- Assist Step and Floor Liner Package:
- All-weather floor liners
- Choice of assist step 6" Chrome rectangular tubular assist step or 4" Chrome round tubular assist step
- Gooseneck Hitch Package:
- Gooseneck ball
- Chain tiedown kit with case
- May require additional optional equipment
- 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
- 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
- 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
- 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
- HD Rear Vision Camera:
- Shows high-resolution digital image of area directly behind your vehicle while in Reverse1
- Can help you park or avoid vehicles and objects
- You can also display an overlay of where your vehicle is heading
- Tailgate must be in the raised position for the HD Rear Vision Camera to operate properly
- 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
- OnStar® services capable:
- See onstar.com for details and limitations. Services vary by model. Service plan required.
- 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
- 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
- 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
KBB.com Consumer Reviews
- 5.0
2020 GMC Denali 3500 HD Duramax is a BEAST!
By Merlinsmerc on Friday, January 22, 2021
Pulling a conventional 10,000 lb trailer over mountain passes is a whole new experience. Staying at the speed limit up long steep grades did not change the engine temperature. I feathered the accelerator up the mountain. The new 10 speed transmission is so smooth you cant feel it changing gears. This is my second GMC Denali Duramax, first being a 2016. I debated trading in for over a year, and am so happy I made the trade. Trailers always exceed by far the tongue weight posted on them, and in my case it came in at 1450 lbs. That exceeded my trucks posted maximum. The 2020 dually posts a 2,000 lb tongue weight, so now I can front load the trailer, and that reduces sway. If you can afford it, and have a heavy trailer, buy the truck! - 5.0
Love our truck
By Ron on Friday, December 11, 2020
The truck doesn’t have a sun roof which it was suppose to have - 2.0
In shop for 13 weeks so far!
By Whip on Monday, September 09, 2024
My truck has been in the shop for 13 weeks to this point with no end in sight. The Infotainment panel blew out which controls pretty much everything. Nice truck except if something goes wrong then, good luck! I would recommend looking at Fords and Rams and ask the question, how many vehicles do you have in your shop waiting for parts and for how long. I heard of one at my GMC dealership that has been waiting for 8 months! Only thing I get from GM is "we understand your frustration". Apparently they don't, or I would have my truck back long ago.
WARNING