2021 GMC Sierra 1500 AT4

  • Used
$42,383Price
$43,082Sale Price
Value Your Trade
Harper Volkswagen of Knoxville
Location Details
Website
Call 888-570-1979
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    The overview

    Exterior Color
    Summit White
    Interior Color
    Jet Black
    Odometer
    38,675 miles
    Body/Seating
    Truck Crew Cab/5 seats
    Seats
    5 seats
    Fuel Economy
    16/21 MPG City/Hwy
    Transmission
    10-Speed Automatic
    Drivetrain
    4x4
    Engine Layout
    V-8 cyl
    VIN
    3GTP9EEL0MG259206
    Stock Number
    V21710A

      The highlights

      • Leather upholstery
      • Automatic temperature control
      • Wireless phone connectivity
      • Front dual zone A/C
      • Auto-dimming rearview mirror
      • Split folding rear seat
      • Memory seat
      • Heated front seats
      • Ventilated front seats
      • Perimeter/approach lights
      • Remote keyless entry
      • Heated steering wheel

      A closer look at what’s included

      More pre-installed items

      • AT4 Preferred Package
      • AT4 Value Package
      • Driver Alert Package I
      • Driver Alert Package II
      • 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
      • Heated steering wheel
      • Illuminated entry
      • Memory seat
      • Overhead console
      • Passenger door bin
      • Passenger vanity mirror
      • 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 wheel independent suspension
      • Power steering
      • Speed-sensing steering
      • Tires: all-terrain
      • 1st row LCD monitors: 2
      • Primary LCD size: 8.0"
      • Radio data system
      • Smart device integration: Apple CarPlay/Android Auto
      • Steering wheel mounted audio controls
      • Wireless phone connectivity: Bluetooth
      • Front center armrest
      • Front seats: bucket
      • Heated front 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
      • Cylinder deactivation
      • Drive type: four-wheel
      • Engine location: front
      • Fuel economy city: 16mpg
      • Fuel economy combined: 18mpg
      • Fuel economy highway: 21mpg
      • Fuel tank capacity: 24.0gal.
      • Hybrid traction battery type: none
      • Manual-shift auto
      • Mode select transmission
      • Rear locking differential
      • Standard fuel economy fuel type: gasoline
      • Transmission: 10 speed automatic
      • Variable valve control
      • Ground clearance (min): 276mm (10.9")
      • 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
      • Exterior body width: 2,063mm (81.2")
      • Exterior height: 1,990mm (78.3")
      • Exterior length: 5,885mm (231.7")
      • 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")
      • Rear headroom: 1,019mm (40.1")
      • Rear hiproom: 1,530mm (60.2")
      • Rear legroom: 1,102mm (43.4")
      • Rear shoulder room: 1,655mm (65.2")
      • Wheelbase: 3,744mm (147.4")
      • Appearance: analog
      • Compass
      • Delay-off headlights
      • Front fog lights
      • Front reading lights
      • Fully automatic headlights
      • Low tire pressure warning
      • Oil pressure gauge
      • Outside temperature display
      • 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
      • Ignition disable
      • Occupant sensing airbag
      • Overhead airbag
      • Panic alarm
      • Perimeter/approach lights
      • Security system
      • Traction control
      This 2021 GMC Sierra 1500 AT4 Crew Cab delivers commanding presence and capability in a well-equipped truck built for work and weekend adventure alike. The striking white exterior contrasts beautifully with the jet black leather interior accented with Kalahari details, while the powerful EcoTec3 6.2L V8 engine and 4WD drivetrain provide confidence both on the road and off it. With just under 39,000 miles, this truck remains fresh and ready for years of dependable service.

      - Power Sunroof
      - Technology Package with Navigation
      - 20" Machined Aluminum Wheels with Carbon Grey Accents
      - Heated and Ventilated Front Seats with 10-Way Power Adjusters
      - HD Surround Vision with Trailer View Cameras
      - Power Trailering Mirrors with Heated Glass
      - Multicolor 15" Head-Up Display
      - ProGrade Trailering System with Integrated Brake Controller
      - Automatic Emergency Braking with Lane Keep Assist
      - Spray-On Bed Liner with AT4 Logo

      The AT4 package elevates this Sierra with premium off-road suspension, hill descent control, and exclusive styling that sets it apart. Inside, you'll find versatile technology including the GMC Infotainment System with Apple CarPlay and Android Auto, SiriusXM satellite radio with 360L capability, and wireless charging. The truck also includes practical amenities like remote vehicle starter, adaptive cruise control, lane change alert, rear cross traffic alert, and a rear camera mirrorâ€"all working together to make every drive safer and more convenient. Stop by and experience this capable Sierra for yourself.

      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.…
      All reviews on KBB.com
      Based on 71 consumer ratings for 2019–2026 models. Privacy

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