This 2021 GMC Sierra 2500HD AT4 combines serious capability with refined comfort in a powerful crew cab package. Built on the legendary Duramax 6.6L V8 Turbodiesel engine and backed by a 10-speed automatic transmission, this 4WD workhorse delivers the performance and efficiency you expect from GMC's premium HD lineup. With 81,755 miles, it represents excellent value for a well-equipped truck ready to handle whatever comes next.
- 4-Wheel Drive with 2-Speed Active Transfer Case
- Duramax 6.6L V8 Turbodiesel Engine
- Gooseneck/5th Wheel Package with Integrated Trailer Brake Controller
- Premium Audio System with SiriusXM and Navigation
- Heated and Ventilated Leather Front Seats
- Power Sunroof
- Advanced Safety Suite including Automatic Emergency Braking and Lane Departure Warning
- Wireless Phone Projection and Apple CarPlay/Android Auto
- Dual 220-Amp Primary and 170-Amp Auxiliary Alternators
- Remote Vehicle Starter System
The AT4 trim elevates your experience with premium leather upholstery, an available Bose audio system, and thoughtful conveniences like dual-zone automatic climate control, heated steering wheel, and wireless charging. Technology is front and center with an 8-inch driver information center, 15-inch head-up display, and GMC's connected services suite. The truck's rugged credentials shine through with power-retractable assist steps, LED lighting, and an off-road suspension calibrated for the X31 Off-Road Package.
Visit our showroom today to experience this capable Sierra 2500HD AT4 firsthand. Our team is ready to discuss financing options and answer any questions about this impressive diesel-powered truck.
Used 2021 GMCSierra 2500HD AT4
- Diesel
Contact
- Ext. Color
- Summit White
- Int. Color
- Jet Black
- Odometer
- 81,755 miles
- Body/Seating
- Truck/5 seats
- Seats
- 5 seats
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
- Engine
- Duramax 6.6L V8 Turbodiesel
- VIN
- 1GT49PEY7MF224710
- Stock Number
- MF224710
Highlighted Features
- Leather upholstery
- Automatic temperature control
- Premium audio system
- Wireless phone connectivity
- Front dual zone A/C
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
- Heated front seats
- Ventilated front seats
- Perimeter/approach lights
- Remote keyless entry
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
- Heated steering wheel
- Illuminated entry
- Memory seat
- 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 wheel independent suspension
- Power steering
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- 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
- Steering wheel mounted audio controls
- Wireless phone connectivity: Bluetooth
- Front center armrest
- Front seats: bucket
- 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
- Heated door mirrors
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- 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
- Compass
- Delay-off headlights
- Front fog lights
- Front reading lights
- Fully automatic headlights
- 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
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Security system
- Traction control
Dealer Notes
KBB.com Consumer Reviews
- 4.0
Great truck , bad mileage
By Dream truck owner on 11/8/2026 8:42:28 PM
This truck has everything you want from a luxury heavy duty truck. The backseat is spacious enough to hold adults on road trips. It's got enough power to tow and haul a trailer fully loaded with wood. Four-wheel drive works spectacularly. All the interior amenities just increase the interior comfort. The seats are fantastic. Two things make it bring it down to a four-star, those are visibility out of the mirrors even with the cameras and fuel mileage which is to be expected with a big V8, just thought maybe even hauling empty, It would be above 16 or 17. All in all fantastic. Comfortable truck, mechanically no issues The infotainment center is a little bit buggy, but that doesn't bother me much. Quick reset and you're good to go - 5.0
Love this Truck!
By Erick on 2/25/2026 11:54:52 AM
Haven't had a problem with it 140k haven't touched it other than fluids and filters! Top of the line,! - 5.0
Fantastic Truck
By TK2Camo on 2/14/2024 1:18:29 PM
Solid and dependable, I still love this truck! Absolutely zero issues. Whether it's load after a home improvement run, pulling the camper into the mountains or across the country, or shifted into 4-wheeldrive...it does its job with excellence.
Inventory is subject
to prior sale. Please contact dealer via phone or email for more information. All
prices plus tax, title, license and documentation fee.