New 2026 GMCSierra 3500HD Pro
- Exterior Color
- Summit White
- Interior Color
- Jet Black
- Body/Seating
- Truck Crew Cab/6 seats
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT4USEY8TF122445
- Stock Number
- GM2445
Highlighted Features
- Lane departure
- Premium audio system
- Wireless phone connectivity
- Exterior parking camera rear
- Auto high-beam headlights
- Split folding rear seat
- Perimeter/approach lights
- Remote keyless entry
- Fully automatic headlights
- Alloy wheels
- Bedliner
- Heated door mirrors
Included Packages & Accessories
- State-Specific Emissions Requirements
- 18" Machined Aluminum Wheels
- Hitch Package
- LED Smoked Amber Roof Marker Lamps
- Black Assist Step
- Front License Plate Kit
- Spare LT275/70R18 AT BW Tire
- 2 Charge-Only Rear USB Ports
- Pickup Bed
- LT275/70R18E AT BW Tires
- 3.42 Rear Axle Ratio
- 12,250 lbs GVWR
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- Duramax 6.6L Turbo-Diesel V8 Engine
- 220 Amp Alternator
- 10-Speed Automatic Transmission
- Dual Heavy-Duty 70 Amp-Hour Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- Capped Fuel Fill
- Convenience Package
- EZ Lift Power Lock and Release Tailgate
- Deep-Tinted Glass
- LED Cargo Area Lighting
- Electric Rear-Window Defogger
- Outside Power-Adjustable Black Mirrors
- X31 Off-Road Package
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Gooseneck/5th Wheel Prep Package
- Spray-on Pickup Bedliner
- Preferred Equipment Group 1SA
- Sierra HD Pro Safety
- Forward Collision Alert
- Following Distance Indicator
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam on/Off
- Lane Departure Warning
- Buckle to Drive
- Automatic Emergency Braking
- Wireless Phone Projection
- Push Button Start
- Remote Keyless Entry
- 2 Charge/Data USB Ports
- Solar Absorbing Tinted Glass
- Chrome Grille with Flat Black Grille Insert Bars
- 2-Speed Electronic Shift Transfer Case
- Front 40/20/40 Split-Bench Seats with Lockable Storage
- 4-Way Manual Driver Seat Adjuster
- 4-Way Manual Passenger Seat Adjuster
- AM/FM Radio with GMC Infotainment System
- 6-Speaker Audio System Feature
Detailed Specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Driver door bin
- Front beverage holders
- Illuminated entry
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: push button start only
- Rear door bins
- Remote keyless entry
- Speed control
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front tires: 275/70SR18.0E
- Front wheel independent suspension
- Power steering
- Rear tires: 275/70SR18.0E
- Single rear wheels
- Tires: all-terrain
- Wheel size: 18"
- 1st row LCD monitors: 1
- AM/FM radio
- Premium audio system: GMC Infotainment System
- Primary LCD size: 7.0"
- Smart device integration
- Speakers: 6
- Wireless phone connectivity
- Basic warranty: 36 months/36,000miles
- Corrosion perforation warranty: 72 months/100,000miles
- Diesel engine warranty: 60 months/100,000miles
- Maintenance warranty: 12 months/ unlimited distance
- Powertrain warranty: 60 months/60,000miles
- Roadside assistance coverage: 60 months/60,000miles
- Front center armrest: w/storage
- Front seats: bench
- Max seating capacity: 6
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: vinyl
- Split folding rear seat
- Block heater
- Compressor: intercooled turbo
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Horsepower: 470hp @ 2,800RPM
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 32
- Rear locking differential
- Recommended fuel: Diesel
- Standard fuel economy fuel type: diesel
- Torque: 975 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 283mm (11.1")
- Bedliner
- Bumpers: chrome
- Heated door mirrors
- Hitch Class: IV
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Trailer hitch
- Trailer sway control
- Turn signal indicator mirrors
- Compression ratio: 16.00 to 1
- Curb weight: 3,634kg (8,011lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine torque: 975 lb.-ft. @ 1,600RPM
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,049mm (80.7")
- Exterior length: 6,776mm (266.8")
- Front headroom: 1,093mm (43.0")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- GVWR: 5,557kg (12,250lbs)
- Payload: 1,903kg (4,195lbs)
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Towing capacity: 9,072kg (20,000lbs)
- Turning radius: 8.7m (28.5')
- Wheelbase: 4,369mm (172.0")
- Appearance: analog
- Auto high-beam headlights
- Compass
- Delay-off headlights
- Exterior parking camera rear
- Front reading lights
- Fully automatic headlights
- Lane departure: warning
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Rear reading lights
- Rear window defroster
- Tachometer
- Trip computer
- Variably intermittent wipers
- Voltmeter
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Forward collision: mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Traction control
Standard Features
- 220 Amp Alternator
- 10-Speed Automatic Transmission
- 12,250 lbs GVWR
- 3.42 Rear Axle Ratio
- Dual Heavy-Duty 70 Amp-Hour Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- Capped Fuel Fill
- Spray-on Pickup Bedliner
- EZ Lift Power Lock and Release Tailgate
- Deep-Tinted Glass
- LED Cargo Area Lighting
- Electric Rear-Window Defogger
- Outside Power-Adjustable Black Mirrors
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- 120-Volt Bed Mounted Power Outlet
- Forward Collision Alert
- Following Distance Indicator
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam on/Off
- Lane Departure Warning
- Buckle to Drive
- Automatic Emergency Braking
- 6-Speaker Audio System Feature
- 4-Way Manual Driver Seat Adjuster
- 4-Way Manual Passenger Seat Adjuster
- Sierra HD Pro Safety
- Wireless Phone Projection
- Push Button Start
- Remote Keyless Entry
- 2 Charge/Data USB Ports
- Solar Absorbing Tinted Glass
- Chrome Grille with Flat Black Grille Insert Bars
- 2-Speed Electronic Shift Transfer Case
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.