2021 GMC Sierra 1500 AT4 Truck Engine: Duramax , Turbo-Diesel, Inline 6 Cylinder

  • Used
  • Diesel
$799Documentation Fee
Value Your Trade

    The overview

    Exterior Color
    Ebony Twilight Metallic
    Interior Color
    JET BLACK WITH KALAHARI ACCENTS, PERFORATED LEATHE
    Odometer
    60,774 miles
    Fuel Economy
    14/19 MPG City/Hwy
    Transmission
    Automatic
    Drivetrain
    4WD
    Engine
    Engine: Duramax 3.0L, Turbo-Diesel, Inline 6 Cylinder
    VIN
    1GTU9EET0MZ404540
    Stock Number
    G214540
      • Max seating capacity: 5
      • Fuel System: Direct Injection
      • Fuel tank capacity: 24 gal
      • Horsepower: 277
      2021 GMC Sierra 1500 AT4 delivers the capability and refinement you expect from this legendary truck. This black Crew Cab short-box 4WD is powered by a 3.0L turbocharged diesel engine paired with a 10-speed automatic transmission, offering impressive EPA-estimated 22 city / 26 highway MPG. Actual mileage may vary. With 60,774 miles on the odometer, this Sierra remains in strong condition with plenty of service life ahead.- 3.0L I-6 Diesel Turbocharged Engine with Engine Block Heater- 4WD with Off-Road Suspension and Hill Descent Control- Heated and Ventilated Front Seats with 10-Way Power Driver Adjustment- Apple CarPlay/Android Auto with Premium GMC Infotainment System- ProGrade Trailering System with Integrated Trailer Brake Controller- HD Rear Vision Camera and Hitch Guidance with Hitch View- Spray-On Pickup Bed Liner with AT4 Logo- Goodyear Wrangler DuraTrac LT275/65R18 Tires- Remote Vehicle Starter System and Keyless Open & Start- SiriusXM with 360L and Steering Wheel Audio ControlsThe AT4 trim combines rugged capability with premium comfort features. The diesel engine delivers excellent torque for towing and hauling, while the advanced ProGrade system makes trailer management seamless. Inside, the Jet Black leather with Kalahari accents creates an upscale cabin atmosphere. Front bucket seats with heating and ventilation keep you comfortable on every drive, and the heated steering wheel adds a touch of luxury on cold mornings. Electronic Stability Control, traction control, and the auto-locking rear differential provide confident off-road and all-weather performance.Visit us today to experience this Sierra 1500 AT4 firsthand and discover why it's the truck that refuses to compromise.At Ciocca Automotive, we are dedicated to providing an exceptional car-buying experience. With convenient locations throughout PA, NJ, and CT, we offer an extensive selection of new and pre-owned vehicles.Our commitment to customer satisfaction, transparent pricing, and flexible financing ensures you will find the perfect car, truck, or SUV for your budget.We don't just sell cars we build lasting relationships. Visit a Ciocca dealership today or explore our inventory and exclusive online deals. Thank you for choosing us to help you find a reliable vehicle you can trust!

      KBB.com Consumer Reviews

      Kelley Blue Book Logo4.0out of 5 overall
      • 4.0

        Depreciation of 50%

        by Manny A on 10/28/2026 10:06:36 AM

        This is a amazing truck.. Comfortable lots of sensors Etc…. My truck has 30000 miles I when to trade in they offer $46000 I paid $86000 the depreciation is incredible I don’t buy new truck never again.…
      • 5.0

        2021 GMC SLT 4WD SIERRA, Great Truck

        by Ransom1 on 10/15/2026 4:18:42 PM

        This is my 8th truck. This is hands down the very best truck I’ve ever owned. Not only is it the best looking truck on the road I have never had it in the shop except for oil changes and scheduled maintenance. The silver does not show dirt or grime.…
      • 5.0

        Great 4 cylinder truck

        by Steve on 9/23/2026 2:01:15 AM

        I have only pulled a trailer one time and still got 18 mpg down doing 80 down the interstate. Otherwise this vehicle is used for commuting or recreating. I typically get 22-24 mpg driving MT highways to the mountains. The turbo has some spunk for getting up to speed and the five years I've had my truck no complaints.…