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Cowboys Auto Sales LLC

4123 Forest Lane, Garland, TX 75042
4.3
4.3 out of 5 stars
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Used 2021 GMC Sierra 1500 SLT

45,679 miles
For Sale:$29,995
Estimated payment:$680/mo.
$0 trade-in, 10% down payment, 48 months, Great credit score

Value ChartA visual chart indicating the fair price range is between $33,300 and $39,100, while the current price is $29,995.$33,300 - $39,100$29,995

  • Priced at $29,995, this vehicle is $3,305 (10%) below the low end of its fair market value of $33,300.

  • The current fair market price range is between $33,300 to $39,100.

  • It has 45,679 miles, which is 41,521 (48%) below the median mileage of 87,200.

Note: This is an estimate based on a variety of factors (experimental feature). It is intended to provide a fair market value range to help guide your buying decision.

View Full Value Report
Used 2021 GMC Sierra 1500 SLT for sale near Dallas, Plano, Irving, Garland, Mckinney, Frisco, Mesquite, Carrollton
Used 2021 GMC Sierra 1500 SLT for sale near Dallas, Plano, Irving, Garland, Mckinney, Frisco, Mesquite, Carrollton
Used 2021 GMC Sierra 1500 SLT for sale near Dallas, Plano, Irving, Garland, Mckinney, Frisco, Mesquite, Carrollton
Used 2021 GMC Sierra 1500 SLT for sale near Dallas, Plano, Irving, Garland, Mckinney, Frisco, Mesquite, Carrollton
Used 2021 GMC Sierra 1500 SLT for sale near Dallas, Plano, Irving, Garland, Mckinney, Frisco, Mesquite, Carrollton
  • Truck
  • Pickup
  • Crew Cab
  • Extended Front Legroom
  • Vaulted Headroom
  • Condition
    Used
  • Mileage
    45,679miles
  • Aggregate Ratings
    3.6
    3.6 out of 5 stars
  • Generation
    4(2019 - 2026)
  • Trim
    SLT
  • Drivetrain
    4X4
  • Transmission
    10-Speed Shiftable Automatic
  • MPG
    22 city26 highwayMax range: 624 miles
  • Exterior Color
    Titanium
  • Interior Color
    Jet Black (Black)Factory Paint Code:H1Y
  • Upholstery
    Leather
  • Size Segment
    1/2 Ton
  • Doors
    4
  • Max Seating
    6
  • Max Towing Capacity
    11,700lbs.
  • Weight Class
    6,000-10,000 lbs. (2)
  • Bed Length
    69.9in.
  • Ground Clearance
    8.1inch
  • NHTSA Safety Ratings
    4
    4 out of 5 stars
  • Final Assembly Point
    Silao, Mexico
  • VIN
    3GTU9DET2MG380056
  • Starting MSRP
    $50,800

Engine3L I6 Diesel 277hp

  • Fuel Type:Diesel
  • Max Horsepower:277 hp @ 3750 rpm
  • Power to Weight Ratio:18.19lbs/hp
  • Max Torque:460 ft.lbf @ 1500 rpm
  • Brand:Duramax
  • Displacement:3liters
  • Block Type:I
  • Cylinders:6
  • Aspiration:Turbo
  • Fuel Induction:Common Rail Direct Injection
  • Cam Type:DOHC
  • Stroke:3.54
  • Bore:3.3
  • Valves:24

  • Comfort & Seating:

    • Heated Seats
    • Heated Steering Wheel
    • Power Seats

  • Convenience:

    • 115V Power Outlet
    • Automatic Climate Control
    • Remote Start

  • Entertainment:

    • Bluetooth
    • Satellite Radio

  • Exterior:

    • Heated Mirrors
    • Tinted Windows

  • Other:

    • Trailer Hitch

  • Safety:

    • Backup Camera
    • Tire Pressure Monitoring

  • Technology:

    • Android Auto

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Listed on April 12, 2026 (3 hours ago)
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This Used 2021 GMC Sierra 1500 SLT is available for drivers in Dallas, Plano, Irving, Garland, Mckinney, Frisco, Mesquite, Carrollton ...

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.