Used 2020 GMCSierra 2500HD Denali
- Exterior Color
- Carbon Black Metallic
- Interior Color
- JET BLACK
- Odometer
- 126,435 miles
- Seating
- 5 seats
- Transmission
- Allison 10-Speed Shiftable Automatic
- Engine
- Duramax 6.6L Biodiesel Turbo V8 445hp 910ft. lbs.
- VIN
- 1GT49REYXLF133425
- Stock Number
- 2R0597B
Highlighted Features
- Navigation system
- Lane departure
- Leather upholstery
- Automatic temperature control
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Front dual zone A/C
- Auto high-beam headlights
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
Included Packages & Accessories
- Polished Exhaust Tip
- 3.42 Rear Axle Ratio
- Coolant Temperature Warning Warnings And Reminders
- Low Oil Pressure Warnings And Reminders
- Lamp Failure Warnings And Reminders
- Front Automatic Emergency Braking
- MyGMC With Connected Access Smart Device App Compatibility
- Multi-function Split-folding Tailgate
- 8 In. Instrument Cluster Screen Size
- 8 In. Infotainment Screen Size
- GMC Infotainment System Infotainment
- Check Rear Seat Reminder
- Height Passenger Seat Power Adjustments
- Android Auto Smartphone Integration
- Apple CarPlay Smartphone Integration
- Height Driver Seat Power Adjustments
- Part Time W/ On Demand Setting 4WD Type
- LED Front Fog Lights
- App Marketplace Integration Connected In-car Apps
- Front Wireless Charging Station
- Visual Warning Pre-collision Warning System
- Audible Warning Pre-collision Warning System
- Power Locking Tailgate
- LED Pickup Bed Light
- Vibrating Driver Seat Pre-collision Warning System
- Maintenance Status Smart Device App Function
- Roadside Assistance Driver Assistance App
- Hill Descent Off-road Driving Assist
- Hotspot Wi-Fi
- Voice Guided Directions Satellite Communications
- Voice Operated Electronic Messaging Assistance
- With Read Function Electronic Messaging Assistance
- LED Daytime Running Lights
- Rear Cross Traffic Alert
- Touch Screen Display Radio
- Bluetooth Auxiliary Audio Input
- Memory Card Navigation System
- Voice Operated Radio
- In Dash Rearview Monitor
- Low Battery Warnings And Reminders
- SiriusXM Satellite Radio
- Twin-tube Gas Front Shock Type
- Programmable Safety Key
- Front Emergency Locking Retractors
- Trailer Brake Controller
- Towing Mirrors
- 7-pin Trailer Wiring
- IPod/iPhone Auxiliary Audio Input
- Trip Odometer
- Auto On/off Headlights
- Polished Aluminum Exhaust Tip Color
- 3-point Front Seatbelts
- 3-point Rear Seatbelts
- Stainless Steel Window Trim
- Capless Fuel Filler System
- Auto Delay Off Headlights
- Voice Control Steering Wheel Mounted Controls
- Rear Cupholders
- Lane Deviation Sensors
- Proximity Entry System Multi-function Remote
- Door Pockets Storage
- LED Headlights
- Approach Lamps Exterior Entry Lights
- Puddle Lamps Exterior Entry Lights
- Front Seatback Storage
- Rear Parking Sensors
- 115V Front Power Outlet(s)
- Homelink - Garage Door Opener Universal Remote Transmitter
- Power Driver Seat Easy Entry
- Multi-function Steering Wheel Mounted Controls
- Phone Steering Wheel Mounted Controls
- Cruise Control Steering Wheel Mounted Controls
- Range Fuel Economy Display
- MPG Fuel Economy Display
- HD Radio Radio
- Memory Card Slot Auxiliary Audio Input
- USB Auxiliary Audio Input
- Jack Auxiliary Audio Input
- Auto-dimming Rearview Mirror
- Perforated Upholstery Accents
- 4-pin Trailer Wiring
- Chrome Running Board Color
- Short And Long Arm Front Suspension Type
- Front Console With Armrest And Storage Center Console
- Polished Aluminum Alloy Wheels
- Maintenance-free Battery
- Power Folding Side Mirror Adjustments
- Black Fender Lip Moldings
- Oil Pressure Gauge
- Body-color Rear Bumper Color
- Lift Assist Tailgate
- Heated Rear Seat
- Auto-locking Power Door Locks
- Auxiliary Oil Cooler
- Auto-dimming Side Mirrors
- Remote Engine Start
- Reclining Driver Seat Power Adjustments
- Front Skid Plate(s)
- Removable Tailgate
- Reclining Passenger Seat Power Adjustments
- Air Filtration
- Auxiliary Transmission Fluid Cooler
- Reverse Gear Tilt Side Mirror Adjustments
- Carpet Floor Material
- Folds Up Rear Seat Folding
- Rear Assist Handle
- Diameter 35 Mm Front Stabilizer Bar
- Heated Side Mirrors
- Lumbar Passenger Seat Power Adjustments
- Lumbar Driver Seat Power Adjustments
- Front Floor Mats
- Twin-tube Gas Rear Shock Type
- Adjustable Front Headrests
- 12V Front Power Outlet(s)
- Rear Reading Lights
- Front Seatbelt Warning Sensor
- Full-size Spare Tire Size
- Power Side Mirror Adjustments
- Dual Illuminating Vanity Mirrors
- Push-button Start
- Roll Stability Control
- Chrome Grille Color
- Heavy Duty Battery
- Voice Operated Navigation System
- Trailer Hitch
- Multi-function Display
- Under Rear Seats Storage
- Rear Floor Mats
- Battery Saver
- Woodgrain Interior Accents
- Rearview Camera System
- Ventilated Passenger Seat
- Auto Off Electronic Parking Brake
- External Temperature Display
- Speed Sensitive Volume Control
- LED Taillights
- Rear Center With Cupholders Armrests
- Power Brakes
- Digital Odometer
- Touch Screen Display Navigation System
- Rear Folding Armrests
- Leather-trimmed Upholstery
- Integrated Turn Signals Side Mirrors
- Hill Holder Control
- Running Boards
- Side Mirrors Memorized Settings
- Driver Seat Memorized Settings
- Low Fuel Level Warnings And Reminders
- Adjustable Rear Headrests
- Tie-down Anchors Pickup Bed Cargo Management
- Audio Steering Wheel Mounted Controls
- Spray-on Pickup Bed Liner
- Chrome Mirror Color
- Chrome Door Handle Color
- Front Overhead Console
- Metallic-tone Interior Accents
- Body-color Front Bumper Color
- Lockout Button Power Windows
- Safety Reverse Power Windows
- Radio Data System
- Multi-leaf Rear Suspension Type
- 4-wheel ABS
- Tow/Haul Mode
- Compass
- Maintenance Due Warnings And Reminders
- Panic Alarm Multi-function Remote
- Tinted Glass
- Electronic Brakeforce Distribution
- Vehicle Immobilizer Anti-theft System
- LATCH System Child Seat Anchors
- Child Safety Door Locks
- Anti-lockout Power Door Locks
- Tire Pressure Monitoring System
- Variable Intermittent Front Wipers
- Cruise Control
- Alarm Anti-theft System
- Tachometer Gauge
- Rear Window Defogger
- Traction Control
- Stability Control
- Front Side Curtain Airbags
- Braking Assist
- Dual Front Airbags
- Powertrain Hour Meter
- Rear Locking Differential
- Rear Step Bumper Detail
- Off-road Tuned Suspension
- Trailer Stability Control
- Roof-mounted Lights
- Power Telescoping Side Mirror Adjustments
- Front Assist Handle
- 170 Amps Alternator
- Clock
- Leather Door Trim
- Simulated Wood Door Trim
- 60-40 Split Bench Rear Seat Type
- AM/FM Radio
- Leather Steering Wheel Trim
- 12V Rear Power Outlet(s)
- 6 Total Speakers
- Variable/speed-proportional Power Steering
- Ventilated Disc Front Brake Type
- Bucket Front Seat Type
- Front Reading Lights
- 10 Passenger Seat Power Adjustments
- Power Horizontal Pickup Sliding Rear Window
- Steel Spare Wheel Type
- Second Row Rear Vents
- Underbody Spare Tire Mount Location
- 2 Front Headrests
- Voice Operated Hands-free Phone Call Integration
- Simulated Wood Center Console Trim
- Leather Center Console Trim
- Heated Steering Wheel
- 1 Subwoofer
- Bluetooth Wireless Data Link
- Torsion Bars Front Spring Type
- Front Tow Hooks
- 4 One-touch Windows
- 3 Rear Headrests
- Front Seatbelt Pretensioners
- 115V Cargo Area Power Outlet(s)
- OnStar Satellite Communications
- 10 Driver Seat Power Adjustments
- Leaf Rear Spring Type
- Dual Front Air Conditioning Zones
- 720 CCA Battery Rating
- Heated Driver Seat
- Mast Antenna Type
- Diversity Antenna Type
- Front Parking Sensors
- Rear Side Curtain Airbags
- Rear Skid Plate(s)
- Heated Passenger Seat
- Electronic Hi-lo 4WD Selector
- Step Tailgate
- Automatic Climate Control Front Air Conditioning
- Solid Live Axle Rear Suspension Classification
- Tilt And Telescopic Steering Wheel
- Front Side Airbags
- Sensor/alert Blind Spot Safety
- Ventilated Driver Seat
- 2 Driver Memorized Settings
- Carpet Floor Mat Material
- Bose Premium Brand
- Front Cupholders
- Auto High Beam Dimmer Headlights
- Independent Front Suspension Classification
- Ventilated Disc Rear Brake Type
- Occupant Sensing Passenger Airbag Deactivation
- Exhaust Brake
- Winter Grille Cover
- Gooseneck / 5th Wheel Package
- Wheel Locks
- Front and Rear Black Molded Splash Guards
- Power Sunroof
- Bed View Camera
- Rear Camera Mirror
- Technology Package
- Denali Ultimate Package
- 220 Amp Alternator
- Engine Block Heater
- High Idle Switch
Detailed Specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Navigation system
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front tires: 275/65SR20.0E
- Front wheel independent suspension
- Power steering
- Rear tires: 275/65SR20.0E
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- Wheel size: 20"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 8.0"
- Smart device integration: Apple CarPlay/Android Auto
- Speaker type: Bose
- Speakers: 7
- Steering wheel mounted audio controls
- Wireless phone connectivity: Bluetooth
- Front center armrest
- Front seats: bucket
- Genuine wood console insert
- Genuine wood door panel insert
- Heated front seats
- Heated rear seats
- Leather upholstery
- Max seating capacity: 5
- Power 2-way driver lumbar support
- Power 2-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: leather
- Split folding rear seat
- Ventilated front seats
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Fuel economy fuel type: gasoline
- Fuel tank capacity: 36.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Variable valve control
- Ground clearance (min): 257mm (10.1")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Door mirrors: chrome
- Heated door mirrors
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Tailpipe finisher: polished
- Trailer hitch receiver
- Trailer sway control
- Turn signal indicator mirrors
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,023mm (79.7")
- Exterior length: 6,352mm (250.1")
- 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")
- Rear headroom: 1,013mm (39.9")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Towing capacity: 6,577kg (14,500lbs)
- Turning radius: 8.0m (26.3')
- Wheelbase: 4,037mm (158.9")
- Appearance: analog
- Auto high-beam headlights
- Blind spot: Lane Change Alert with Side Blind Zone Alert warning
- Compass
- Delay-off headlights
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Lane departure: Lane Departure Warning warning
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: UltraSonic front and rear
- 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: Forward Collision Alert with Automatic Braking mitigation
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Rear collision: Rear Cross-Traffic Alert warning
- Security system
- Traction control
Dealer Notes
Experience the ultimate in power and luxury with this 2020 GMC Sierra 2500HD Denali Crew Cab Long Bed 4x4. Powered by the legendary Duramax 6.6L Turbo Diesel V8 (445hp, 910 lb-ft torque) paired with the renowned Allison 10-speed automatic, this truck is ready for serious towing and heavy-duty work. Enjoy advanced features like the Denali Ultimate Package, Technology Package, Gooseneck/5th Wheel Prep, Trailer Brake Controller, Towing Mirrors, and Multi-function Split-folding Tailgate. Stay connected and comfortable with a Bose premium sound system, wireless charging, heated/ventilated leather seats, heated steering wheel, power sunroof, and GMC Infotainment with Apple CarPlay/Android Auto. Safety is top-notch with Front Automatic Emergency Braking, Rear Cross Traffic Alert, Blind Spot Monitoring, Lane Departure Warning, Rear Camera Mirror, Parking Sensors, and more. The spray-on bedliner, running boards, polished alloy wheels, and LED lighting add style and utility. This Sierra Denali is the perfect blend of rugged capability and refined comfort-ready for your toughest jobs or your next adventure.
KBB.com Consumer Reviews
- 2.0
Transmission trash
By Jason on Monday, April 07, 2025
Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk - 3.0
Infotainment system unreliable!
By Brian C on Friday, June 27, 2025
The servicing dealer has been great, the GM engineers not so much! The truck will without warning have no sound for the radio and the blinkers. GM told the dealership to reprogram then when that didn't work they said replace the amplifier and when that didn't work, they said replace a module, and when that didn't work they said to replace the amplifier again, and when that didn't work they said we know it's a known problem but we don't know how to fix it. All of this with less than 9k miles. The dealer has done everything that GM has asked them to do, but none of it works. It's very frustrating to pay this much for a truck and you can't get the radio to stay working. It also got away from the factory with paint damage and a dent in the hood,( the dent is from the inside out on a double wall). I thought I was upgrading when I went from a F250 Lariat to a Denali, but I may have traded one headache for another. - 5.0
Fantastic truck
By Jjj on Sunday, November 07, 2021
This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck!
