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KM Auto Sales

159 North Water Ave, Gallatin, TN 37066
5
5 out of 5 stars
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Used 2021 GMC Sierra 2500HD AT4

125,349 miles
For Sale:$40,999
Estimated payment:$930/mo.
$0 trade-in, 10% down payment, 48 months, Great credit score

Used 2021 GMC Sierra 2500HD AT4 for sale near Nashville, Lebanon, Hendersonville, Mount Juliet, Gallatin, Madison, Hermitage, Goodlettsville
Used 2021 GMC Sierra 2500HD AT4 for sale near Nashville, Lebanon, Hendersonville, Mount Juliet, Gallatin, Madison, Hermitage, Goodlettsville
Used 2021 GMC Sierra 2500HD AT4 for sale near Nashville, Lebanon, Hendersonville, Mount Juliet, Gallatin, Madison, Hermitage, Goodlettsville
Used 2021 GMC Sierra 2500HD AT4 for sale near Nashville, Lebanon, Hendersonville, Mount Juliet, Gallatin, Madison, Hermitage, Goodlettsville
Used 2021 GMC Sierra 2500HD AT4 for sale near Nashville, Lebanon, Hendersonville, Mount Juliet, Gallatin, Madison, Hermitage, Goodlettsville
  • Truck
  • Pickup
  • Crew Cab
  • Heavy Hauler
  • Extended Front Legroom
  • Vaulted Headroom
  • Condition
    Used
  • Mileage
    125,349miles
  • Aggregate Ratings
    3.8
    3.8 out of 5 stars
  • Generation
    4(2020 - 2026)
  • Trim
    AT4
  • Drivetrain
    4X4
  • Transmission
    6-Speed Shiftable Automatic
  • Exterior Color
    Summit White (White)Factory Paint Code:GAZ
  • Interior Color
    Jet Black W Kalahari Accents (Black)Factory Paint Code:HVD
  • Upholstery
    Leather
  • Size Segment
    Heavy Duty
  • Doors
    4
  • Max Seating
    5
  • Max Towing Capacity
    18,500lbs.
  • Weight Class
    10,000-14,000 lbs. (3)
  • Bed Length
    82.2in.
  • Ground Clearance
    10.1inch
  • Final Assembly Point
    Flint, Michigan
  • VIN
    1GT49PE73MF160768
  • Starting MSRP
    $59,100

Engine6.6L V8 Gasoline 401hp

  • Fuel Type:Gasoline
  • Fuel Quality:87
  • Max Horsepower:401 hp @ 5200 rpm
  • Power to Weight Ratio:17.09lbs/hp
  • Max Torque:464 ft.lbf @ 4000 rpm
  • Displacement:6.6liters
  • Block Type:V
  • Cylinders:8
  • Aspiration:Naturally Aspirated
  • Fuel Induction:Direct Injection
  • Redline:5,600rpm
  • Oil Capacity:7.6liters
  • Cam Type:OHV
  • Stroke:3.86
  • Bore:4.06
  • Valves:16

Message from the seller

2021 GMC Sierra 2500HD AT4 for $40,999
Clean title clean carfax no issues!
6.6L V8 Gas Engine 6 Speed Auto

This is the perfect truck for many reasons
Gas is $2 cheaper a gallon than diesel
No emissions issues or expensive fixes
Proven 6 Speed Auto transmission, more reliable than the new 10 speeds
No DEF
Fully loaded AT4 Trim with tons of features and huge towing capacity! Comes with 5th wheel already installed

Runs and drives perfect! Really sharp truck, $46k book value makes it easy to finance


Some Features- Heated and cooled seats, 360 cameras, sunroof, heads up display, adaptive cruise and lane assist, Apple android CarPlay, wireless phone charger. Camera rear view mirror and so much more!

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Listed on March 27, 2026 (13 days ago)
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Cruz™ Disclaimer: Vehicle details shown on this site are provided by sellers or third parties. Cruz™ does not independently verify this information and is not liable for its accuracy. All services and content are offered without any warranty, either expressed or implied. Learn more here.MPG & Max Range: Fuel economy estimates are provided by the EPA and are intended for comparison purposes only. Your actual mileage will vary depending on driving conditions, vehicle condition, and other factors.Price: Prices shown may not include taxes, fees, or other charges. Prices and availability are subject to change without notice. Contact the seller for the most current pricing information.Options & Features: Installed options may not be shown. Contact the seller for more information about available features and options.

This Used 2021 GMC Sierra 2500HD AT4 is available for drivers in Nashville, Lebanon, Hendersonville, Mount Juliet, Gallatin, Madison, Hermitage, Goodlettsville ...