2021 GMC Sierra 1500 AT4

  • Used
  • Diesel
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    The overview

    Exterior Color
    Onyx Black
    Interior Color
    JET BLACK WITH KALAHARI ACCENTS, PERFORATED LEATHE
    Odometer
    70,256 miles
    Fuel Economy
    14/19 MPG City/Hwy
    Transmission
    Automatic
    Drivetrain
    4x4
    Engine
    Engine: Duramax 3.0L, Turbo-Diesel, Inline 6 Cylinder
    VIN
    3GTU9EET7MG244415
    Stock Number
    N16912B
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    A closer look at what’s included

    Base model features & specs only
    • Max seating capacity: 5
    • Fuel System: Direct Injection
    • Fuel tank capacity: 24 gal
    • Horsepower: 277
    EPA estimate 26 MPG Hwy/22 MPG City! Onyx Black exterior and Jet Black with Kalahari accents interior, AT4 trim.

    KEY FEATURES INCLUDE
    4x4, Heated Driver Seat, Cooled Driver Seat, Back-Up Camera, Satellite Radio. GMC AT4 with Onyx Black exterior and Jet Black with Kalahari accents interior features a Straight 6 Cylinder Engine with 355 HP at 5600 RPM*.

    OPTION PACKAGES
    AT4 VALUE PACKAGE includes (PDO) AT4 Preferred Package, (R3O) LT275/65R18C MT blackwall Goodyear Wrangler DuraTrac tires, (PQB) Driver Alert Package, AT4 PREFERRED PACKAGE includes (UG1) Universal Home Remote, (A48) rear sliding power window, (IOT) 8" diagonal Premium GMC Infotainment with navigation, (UQA) Bose Premium Audio System and (K4C) Wireless Charging, SUNROOF, POWER, ENGINE, DURAMAX 3.0L TURBO-DIESEL I6 (277 hp [206.6 kW] @ 3750 rpm, 460 lb-ft of torque [623.7 N-m] @ 1500 rpm) Includes (KW5) 220-amp alternator and (K05) engine block heater.), DRIVER ALERT PACKAGE I includes (UD5) Front and Rear Park Assist, (UKC) Lane Change Alert with Side Blind Zone Alert and (UFG) Rear Cross Traffic Alert (Includes Perimeter Lighting. WHEELS, 20" X 9" (50.8 CM X 22.9 CM) MACHINED ALUMINUM WITH CARBON GREY METALLIC ACCENTS, AUDIO SYSTEM, PREMIUM GMC INFOTAINMENT SYSTEM WITH NAVIGATION AND 8" DIAGONAL COLOR TOUCH-SCREEN, INCLUDES MULTI-TOUCH DISPLAY, AM/FM STEREO Bluetooth® streaming audio for music and most phones; featuring wireless Android Auto® and Apple CarPlay® capability for compatible phones, advanced voice recognition, in-vehicle apps, personalized profiles for infotainment and vehicle settings. Includes greater memory Note: (PZ8) Hitch Guidance with hitch view is included with trim.), SEATS, HEATED SECOND ROW OUTBOARD SEATS Standard on models built before 7-26-2021. Certain vehicles built on or after 7-26-2021 will include (RFU) Not Equipped with Heated Second Row Outboard Seats, which removes (KA6) Heated Second Row Outboard Seats. See dealer for details.), TRANSMISSION, 10-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking (Most vehicles built on or after 6-7-2021 with a V8 engine and (MQB) 10-speed automatic transmission will have (NSS) Not Equipped with Automatic Stop/Start, which removes Automatic Stop/Start and its content.) (STD).

    Horsepower calculations based on trim engine configuration. Fuel economy calculations based on original manufacturer data for trim engine configuration. Please confirm the accuracy of the included equipment by calling us prior to purchase.

    Peace of mind

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    Vehicle history report

    • Title information
    • Odometer readings
    • Accident data (if applicable)
    • Service history
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    • Recall information (if applicable)
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    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.…
    *Market adjustment may affect price