Used 2021 GMCSierra 2500 HD AT4
- Exterior Color
- Summit White
- Interior Color
- Jet Black
- Odometer
- 77,649 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT49PEY7MF253558
- Stock Number
- K26040A
GMC
Sierra 2500 HD
Highlighted Features
- Navigation system
- Lane departure
- Leather upholstery
- Automatic temperature control
- Power moonroof
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
Included Packages & Accessories
- Power-Retractable Black Assist Steps
- Front License Plate Kit
- High Idle Switch
- Dual 220-Amps Primary/170-Amps Aux Alternators
- Pickup Box
- 5th Wheel & Gooseneck Trailer Wiring Provisions
- LED Smoked Amber Roof Marker Lamps
- Bose Premium 7 Speaker Sound System
- Wireless Charging
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Bed View Camera w/2 Trailer Camera Provisions
- 8" Multicolor Driver Information Center
- Lane Change Alert w/Side Blind Zone Alert
- Multicolor 15" Diagonal Head-Up Display
- Transmission: Allison 10-Speed Automatic
- GVWR: 11,350 lbs
- Safety Alert Seat
- Wheels: 20" Machined Aluminum
- Ultrasonic Front & Rear Park Assist
- Driver Alert Package I
- Rear Cross Traffic Alert
- Perimeter Lighting
- Winter Grille Cover
- Power Sliding Rear Window w/Defogger
- Universal Home Remote
- Engine Block Heater
- AT4 Preferred Package
- HD Surround Vision
- Radio: Premium GMC Infotainment Sys w/Navigation
- Snow Plow Prep/Camper Package
- 220 Amps Alternator
- Skid Plates
- Power Sunroof
- Front Bucket Seats
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Preferred Equipment Group 4SB
- Radio: AM/FM w/Premium GMC Infotainment System
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- HD Radio
- Wireless Phone Projection
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Front Prem Floor Liners w/Removable Carpet Insert
- Rear Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- 2nd Row Dual USB Charge-Only Ports
- HD Rear Vision Camera
- Spray-On Pickup Box Bed Liner w/AT4 Logo
- Heated Driver & Front Outboard Passenger Seats
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Deep-Tinted Glass
- Painted Black Surround Grille
- Power Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- LED Cargo Area Lighting
- Red Recovery Hooks
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Off-Road Suspension
- Hill Descent Control
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
- Engine: 6.6L V8 w/Direct Injection & VVT
- Heavy-Duty 80 Amp Battery
- GVWR: 10,650 lbs
- 2-Speed Active Transfer Case
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Technology Package
- 3.42 Axle Ratio
- Engine: Duramax 6.6L Turbo-Diesel V8
- Capped Fuel Fill
- Dual Heavy-Duty 70 Amp Battery
- Exhaust Brake
- Automatic Emergency Braking
- Driver Alert Package II
- Forward Collision Alert
- Lane Departure Warning
- AT4 Premium Plus Package
- AT4 High Clearance Step
- Tires: LT275/65R20 AT BW
- Spare LT275/70R18 AT BW Tire
Included Packages & Options
- Engine: Duramax 6.6L Turbo-Diesel V8$9,890
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- GVWR: 11,350 lbs
- 3.42 Axle Ratio
- Transmission: Allison 10-Speed Automatic
- AT4 Premium Plus Package$6,975
- AT4 Preferred Package
- Driver Alert Package I
- Driver Alert Package II
- Wheels: 20" Machined Aluminum
- Power Sunroof
- Technology Package
- AT4 High Clearance Step
- AT4 Preferred Package$2,075
- Bed View Camera w/2 Trailer Camera Provisions
- HD Surround Vision
- Universal Home Remote
- Power Sliding Rear Window w/Defogger
- Radio: Premium GMC Infotainment Sys w/Navigation
- Bose Premium 7 Speaker Sound System
- LED Smoked Amber Roof Marker Lamps
- Wireless Charging
- Technology Package$1,275
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Multicolor 15" Diagonal Head-Up Display
- 8" Multicolor Driver Information Center
- Driver Alert Package I$890
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Driver Alert Package II$645
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Safety Alert Seat
- Snow Plow Prep/Camper Package$300
- 220 Amps Alternator
- Skid Plates
- Tires: LT275/65R20 AT BW$200
- Spare LT275/70R18 AT BW Tire
Included Options
- Power-Retractable Black Assist Steps$1,895
- High Idle Switch$200
- Dual 220-Amps Primary/170-Amps Aux Alternators$380
- 5th Wheel & Gooseneck Trailer Wiring Provisions$35
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
- Moonroof sunshade: manual
- Navigation system
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power moonroof
- 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: 275/65SR20.0
- Front wheel independent suspension
- Power steering
- Rear tires: 275/65SR20.0
- 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
- 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
- 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: 445hp @ 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: gasoline
- Torque: 910 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- 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
- Compression ratio: 16.00 to 1
- Curb weight: 3,515kg (7,749lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine horsepower: 445hp @ 2,800RPM
- Engine torque: 910 lb.-ft. @ 1,600RPM
- 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")
- Payload: 1,616kg (3,563lbs)
- 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
- Heads up display
- 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
Standard Features
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- GVWR: 11,350 lbs
- 3.42 Axle Ratio
- Transmission: Allison 10-Speed Automatic
- AT4 Preferred Package
- Driver Alert Package I
- Driver Alert Package II
- Wheels: 20" Machined Aluminum
- Power Sunroof
- Technology Package
- AT4 High Clearance Step
- Bed View Camera w/2 Trailer Camera Provisions
- HD Surround Vision
- Universal Home Remote
- Power Sliding Rear Window w/Defogger
- Radio: Premium GMC Infotainment Sys w/Navigation
- Bose Premium 7 Speaker Sound System
- LED Smoked Amber Roof Marker Lamps
- Wireless Charging
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Multicolor 15" Diagonal Head-Up Display
- 8" Multicolor Driver Information Center
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Forward Collision Alert
- Lane Departure Warning
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Safety Alert Seat
- 220 Amps Alternator
- Skid Plates
- Spare LT275/70R18 AT BW Tire
- 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
- Off-Road Suspension
- Hill Descent Control
- Skid Plates
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- HD Radio
- Radio: AM/FM w/Premium GMC Infotainment System
- Wireless Phone Projection
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Front Prem Floor Liners w/Removable Carpet Insert
- Rear Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- 2nd Row Dual USB Charge-Only Ports
- HD Rear Vision Camera
- Spray-On Pickup Box Bed Liner w/AT4 Logo
- Heated Driver & Front Outboard Passenger Seats
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Deep-Tinted Glass
- Painted Black Surround Grille
- Power Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- LED Cargo Area Lighting
- Red Recovery Hooks
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Engine: 6.6L V8 w/Direct Injection & VVT
- 2-Speed Active Transfer Case
- Heavy-Duty 80 Amp Battery
- GVWR: 10,650 lbs
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
Dealer Notes
Recent Arrival!
Check out this 2021 GMC Sierra 2500HD AAT4 available at Benson Nissan/Kia of Spartanburg. Offered at just $, this GMC Sierra 2500HD wonât last long. This 4WD GMC Sierra 2500HD AAT4 is powered by a Duramax 6.6L V8 Turbodiesel with only 77649 miles and includes these features and benefits.
10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.
*****Come join the Benson Family. Family owned, friendly staff, serving the Upstate for the last 50 years! We make owning the car of your dreams fun and easy. AAA rating with the Better Business Bureau. If we don't have what you are looking for, we will find it for you! See you Soon!
Check out this 2021 GMC Sierra 2500HD AAT4 available at Benson Nissan/Kia of Spartanburg. Offered at just $, this GMC Sierra 2500HD wonât last long. This 4WD GMC Sierra 2500HD AAT4 is powered by a Duramax 6.6L V8 Turbodiesel with only 77649 miles and includes these features and benefits.
10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.
*****Come join the Benson Family. Family owned, friendly staff, serving the Upstate for the last 50 years! We make owning the car of your dreams fun and easy. AAA rating with the Better Business Bureau. If we don't have what you are looking for, we will find it for you! See you Soon!
KBB.com Consumer Reviews

Overall3.8Out of 5
- 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… - 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!… - 3.0
Don't judge a truck by the appearance
By jmil | on Wednesday, May 11, 2022
Great truck, loved it until the DEF tank heater malfunctioned and shut down the truck. Now sitting waiting for the replacement tank for over 10 weeks. Turns out every HD truck 2020 and 2021 has the same problem and all will need this replacement that is being produced at a snail's pace by GM. Per the dealership, last count, over 9000 trucks like mine are idle waiting for this part. $65000 waste of money and terrible service by GMC (not the local dealership).…
Based on 13 consumer ratings for 2020–2025 models. | Privacy
*All prices exclude closing fee, sales tax, tag, title and registration. Final prices may be subject to credit approval. Additionally, we do not and cannot guarantee that every vehicle sold will be recall-free. Visit safercar.gov to determine whether an individual vehicle is subject to an open recall. All discounted new vehicle prices include any available incentives in lieu of factory APR specials. We make every effort to ensure accurate and reliable information, but are not responsible for website errors. Mention this advertisement to the dealer to receive the advertised price.
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