Flow Buick Mazda GMC of Fayetteville is excited to offer this great-looking 2021 GMC Sierra 2500HD Onyx Black Denali with the following features: FLOW CERTIFIED 12 MONTHS/12000 MILE POWERTRAIN WARRANTY, 3 day money back guarantee, and a free maintenance package! ** 100,000 LIMITED POWERTRAIN WARRANTY, LEATHER, HEATED SEATS, SUNROOF, NAVIGATION, BACK UP CAMERA, BLUETOOTH, COMPLIMENTARY MAINTENANCE FOR 2 YEARS/24,000 MILES, FLOW QRP - OUR USED CARS GO THROUGH A 146 POINT INSPECTION, Sierra 2500HD Denali FLOW CERTIFIED PREOWNED, 4D Crew Cab, Duramax 6.6L V8 Turbodiesel, 10-Speed Automatic, 4WD, Onyx Black, Dark Walnut/Dark Ash Grey Leather, 12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 USB Ports, 2 USB Ports (1st Row), 2-Speed Active Transfer Case, 2nd Row Dual USB Charge-Only Ports, 4G LTE Wi-Fi Hotspot Capable, 6" Rectangular Chromed Tubular Assist Steps, Automatic Emergency Braking, Bed View Camera w/2 Trailer Camera Provisions, Chrome Recovery Hooks, Compass Located In Instrument Cluster, Deep-Tinted Glass, Denali Ultimate Package, Driver Alert Package I, Driver Alert Package II, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Floor-Mounted Center Console, Following Distance Indicator, Forward Collision Alert, GMC Connected Access Capable, Gooseneck/5th Wheel Prep Package, HD Surround Vision, Heated & Ventilated Front Bucket Seats, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seats, Hill Descent Control, Inside Rearview Auto-Dimming Rear Camera Mirror, Integrated Trailer Brake Controller, IntelliBeam Automatic High Beam On/Off, Keyless Open & Start, Lane Change Alert w/Side Blind Zone Alert, Lane Departure Warning System, LED Cargo Area Lighting, LED Smoked Amber Roof Marker Lamps, Manual Tilt-Wheel/Telescoping Steering Column, Multicolor 15" Diagonal Head-Up Display, OnStar & GMC Connected Services Capable, Polished Exhaust Tip, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Rear Windows w/Express Down, Power Sliding Rear Window w/Defogger, Power Sunroof, Power Windows w/Driver Express Up/Down, Preferred Equipment Group 5SA, Rear Cross Traffic Alert, Rear Wheelhouse Liners, Remote Vehicle Starter System, Safety Alert Seat, Signature Denali Grille, Spray-On Pickup Box Bed Liner w/Denali Logo, Steering Wheel Audio Controls, Technology Package, Ultrasonic Front & Rear Park Assist, Unauthorized Entry Theft-Deterrent System, Universal Home Remote, Wireless Charging, Wireless Phone Projection, X31 Off-Road Package.
Here at Flow Buick Mazda GMC of Fayetteville we offer Market Based Pricing. What that means for you, 1. Hassle-Free Experience 2. Faster Buying Process 3. Confidence in Not Overpaying and 4. We do the Research for you. Please call (910) 860-9300 to check availability.
Used 2021 GMCSierra 2500 HD Denali
- Diesel
- Exterior Color
- Onyx Black
- Interior Color
- DARK WALNUT/DARK ASH GREY, FORGE PERFORATED LEATHE
- Odometer
- 112,122 miles
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- Engine: 6.6L V8 DuraMax Diesel, Turbo
- VIN
- 1GT49REY9MF257106
- Stock Number
- 75746GA
Dealer Notes
Included Packages & Accessories
Detailed Specifications
- Max seating capacity: 5
- Fuel System: Direct Injection
- Fuel tank capacity: 36 gal
- Horsepower: 445
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!
*MPG estimates are provided by the EPA
Images are for illustration purposes only.
Please note that we strive to provide accurate pricing at all times. However, pricing is subject to change at any time due to market availability, manufacturer incentives, and the installation of dealer-installed options. Unless otherwise stated, pricing does not include taxes, license, or $799 administrative fee. All pricing must be verified and finalized with the Sales Manager before purchasing. We recommend that you do this in person during your test drive visit so that all applicable incentives and options can be thoroughly explained