Discover the unparalleled power and capability of the 2021 GMC Sierra 2500HD Denali Crew 4X4. This exceptional heavy-duty pickup is engineered to conquer any challenge, whether you're towing a heavy load or navigating rugged terrain.
Equipped with a robust Duramax 6.6L V8 Turbodiesel engine, this Sierra 2500HD Denali delivers an impressive 445 horsepower and an astounding 910 lb-ft of torque, ensuring you have the muscle to tackle the toughest jobs. Paired with a smooth-shifting 10-speed automatic transmission and a capable 4WD system, this truck is ready to take on any adventure.
Key features of this Sierra 2500HD Denali include:
⢠Duramax 6.6L V8 Turbodiesel engine
⢠Gooseneck/5th Wheel Prep Package
⢠Hitch Package with Gooseneck ball and chain tiedown kit
⢠GMC MultiPro Tailgate Step Lights
⢠Front and Rear Molded Splash Guards
⢠220-amp Alternator
In addition, this Sierra 2500HD Denali comes equipped with a host of premium features that elevate the driving experience, including:
⢠Heated and ventilated front seats
⢠Heated rear seats
⢠Bose premium audio system
⢠Wireless charging
⢠Surround vision camera system
⢠Adaptive cruise control
⢠Lane departure warning
The exterior of this Sierra 2500HD Denali is equally impressive, with a bold Cayenne Red Tintcoat paint color, chrome accents, and the signature Denali grille. The interior is equally luxurious, with premium leather-appointed seating, genuine wood trim, and a spacious Crew Cab configuration.
Whether you're hauling heavy loads, towing a trailer, or simply seeking a comfortable and capable daily driver, the 2021 GMC Sierra 2500HD Denali is the perfect choice. Experience the unrivaled power and refinement of this exceptional heavy-duty pickup. Visit our showroom today and let us demonstrate why the Sierra 2500HD Denali is the ultimate choice for discerning truck buyers.
Used 2021 GMCSierra 2500 HD Denali
- Diesel
- Exterior Color
- Cayenne Red Tintcoat
- Interior Color
- Jet Black
- Odometer
- 62,465 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT49REY5MF145161
- Stock Number
- G55093-1
Highlighted Features
- Navigation system
- Lane departure
- Leather upholstery
- Automatic temperature control
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
- Front dual zone A/C
Included Packages & Accessories
- 7 Speakers
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Steering Wheel Audio Controls
- Air Conditioning
- Automatic temperature control
- Electric Rear-Window Defogger
- Front dual zone A/C
- Rear window defroster
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- Memory seat
- Power driver seat
- Power steering
- Power windows
- Power Windows w/Driver Express Up/Down
- Remote keyless entry
- Remote Vehicle Starter System
- Steering wheel mounted audio controls
- Universal Home Remote
- Manual Tilt-Wheel/Telescoping Steering Column
- Speed-sensing steering
- Traction control
- 4-Wheel Disc Brakes
- ABS brakes
- Dual front impact airbags
- Dual front side impact airbags
- Electrical Lock Control Steering Column
- Front anti-roll bar
- Front wheel independent suspension
- Keyless Open & Start
- Low tire pressure warning
- Occupant sensing airbag
- Overhead airbag
- Power Door Locks
- Pickup Box
- Brake assist
- Electronic Stability Control
- Lane Departure Warning System
- Exterior Parking Camera Rear
- Auto High-beam Headlights
- Delay-off headlights
- Front fog lights
- Fully automatic headlights
- Panic alarm
- Security system
- Unauthorized Entry Theft-Deterrent System
- Speed control
- 2-Speed Active Transfer Case
- Heavy-Duty 80 Amp Battery
- 6" Rectangular Chromed Tubular Assist Steps
- Auto-dimming door mirrors
- Bumpers: body-color
- Heated door mirrors
- LED Cargo Area Lighting
- LED Smoked Amber Roof Marker Lamps
- Polished Exhaust Tip
- Power door mirrors
- Rear step bumper
- Rear Wheelhouse Liners
- Signature Denali Grille
- Spray-On Pickup Box Bed Liner w/Denali Logo
- Turn signal indicator mirrors
- 2 USB Ports
- 2 USB Ports (1st Row)
- 2nd Row Dual USB Charge-Only Ports
- Apple CarPlay/Android Auto
- Auto-dimming Rear-View mirror
- Bed View Camera w/2 Trailer Camera Provisions
- Compass
- Compass Located In Instrument Cluster
- Driver door bin
- Driver vanity mirror
- Floor-Mounted Center Console
- Front reading lights
- Garage door transmitter
- Genuine wood console insert
- Genuine wood door panel insert
- HD Surround Vision
- Heated steering wheel
- Illuminated entry
- Outside temperature display
- Overhead console
- Passenger vanity mirror
- Rear reading lights
- Rear seat center armrest
- Tachometer
- Telescoping steering wheel
- Tilt steering wheel
- Trip computer
- Voltmeter
- Wireless Charging
- Wireless Phone Projection
- Forge Perforated Leather-Appointed Front Seat Trim
- Front Center Armrest
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Heated Driver & Front Outboard Passenger Seats
- Heated front seats
- Heated rear seats
- Power passenger seat
- Safety Alert Seat
- Split folding rear seat
- Ventilated front seats
- Passenger door bin
- Chrome Recovery Hooks
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
- Integrated Trailer Brake Controller
- Alloy wheels
- Wheels: 20" Multi-Dimensional Polished Aluminum
- Deep-Tinted Glass
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Power Sliding Rear Window w/Defogger
- Variably intermittent wipers
- 3.73 Rear Axle Ratio
- Driver Alert Package I
- Driver Alert Package II
- X31 Off-Road Package
- Bose Premium 7 Speaker Sound System
- HD Radio
- Radio: Premium GMC Infotainment Sys w/Navigation
- SiriusXM w/360L
- Driver Memory
- Off-Road Suspension
- Hill Descent Control
- IntelliBeam Automatic High Beam On/Off
- 4G LTE Wi-Fi Hotspot Capable
- Automatic Emergency Braking
- Following Distance Indicator
- Forward Collision Alert
- GMC Connected Access Capable
- Lane Change Alert w/Side Blind Zone Alert
- OnStar & GMC Connected Services Capable
- Rear Cross Traffic Alert
- Ultrasonic Front & Rear Park Assist
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Front Bucket Seats
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 with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 8.0"
- Smart device integration: Android Auto/Apple CarPlay
- 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 tank capacity: 36.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Standard fuel economy fuel type: gasoline
- 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")
- 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
- Exterior parking camera cargo
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera rear
- Exterior parking camera right
- 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: Front and Rear Park Assist 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
Standard Features
- Forward Collision Alert
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Bose Premium 7 Speaker Sound System
- SiriusXM w/360L
- HD Radio
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Off-Road Suspension
- Hill Descent Control
Dealer Notes
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!