2021 GMC Sierra 1500 AT4

  • Pre-Owned
$899Doc Fee
$36,380Price
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Finance Terms
*Online discounted price must be presented to sales staff upon arrival at the dealership for price to be applicable. In stock vehicles only.
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Rusty Wallace Kia Morristown
Location Details
Call 423-586-1441
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    The overview

    Exterior Color
    Gray
    Interior Color
    Jet Black w/Kalahari Accents
    Odometer
    98,742 miles
    Body/Seating
    Crew Cab/5 seats
    Seats
    5 seats
    Transmission
    10-Speed Automatic
    Drivetrain
    Four Wheel Drive
    VIN
    1GTU9EET1MZ431617
    Stock Number
    13033C
    • Show Me the CARFAX Badge

    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

    Front Bucket Seats

    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Driver Memory
      Recalls driver presets for power driver seat and outside mirrors.

    Front Prem Floor Liners w/Removable Carpet Insert

    • Rear Prem Floor Liners w/Removable Carpet Insert

    120-Volt Instrument Panel Power Outlet

    • 120-Volt Bed Mounted Power Outlet
      400 watts shared with (KI4) instrument panel mounted power outlet.

    Radio: Premium GMC Infotainment Sys w/Multi-Touch

    • 6-Speaker Audio System Feature
    • SiriusXM w/360L
      Enjoy a trial subscription of the All Access package for the full 360L experience, with a greater variety of SiriusXM content, a more personalized experience and easier navigation. With the All Access package, you can also enjoy your favorites everywhere you go, with the SiriusXM app, online and at home on compatible connected devices. Important: the SiriusXM radio trial package is not provided on vehicles that are ordered for Fleet Daily Rental (FDR) use. If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. See the SiriusXM customer agreement at www.siriusxm.com for complete terms and how to cancel. All fees, content, features and availability are subject to change. GM connected vehicle services vary by vehicle model and require active service plan, working electrical system, cell reception and GPS signal. See onstar.com for details and limitations.

    ProGrade Trailering System

    • Hitch Guidance w/Hitch View
      Includes image adjustment, pan/zoom/tilt.
    • In-Vehicle Trailering App
      Includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder and trailer electrical diagnostics.

    Trailering Package

    • Hitch Guidance

    More pre-installed items

    • 12-Volt Rear Auxiliary Power Outlet
    • 12V power outlets 2 12V power outlets
    • 170 Amp Alternator
    • 18in x 8.5in Machined Aluminum Wheels
    • 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
    • Block heater
    • Drive type: four-wheel
    • Engine location: front
    • Fuel economy city: 22mpg
    • Fuel economy combined: 24mpg
    • Fuel economy highway: 26mpg
    • Fuel tank capacity: 24.0gal.
    • Hybrid traction battery type: none
    • Manual-shift auto
    • Mode select transmission
    • Rear locking differential
    • Standard fuel economy fuel type: diesel
    • Transmission: 10 speed automatic
    • Variable intake manifold
    • Variable valve control
    • Ground clearance (min): 272mm (10.7")
    • 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
    • Curb weight: 2,508kg (5,530lbs)
    • Exterior body width: 2,063mm (81.2")
    • Exterior height: 1,987mm (78.2")
    • Exterior length: 6,126mm (241.2")
    • 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")
    • GVWR: 3,221kg (7,100lbs)
    • Payload: 699kg (1,540lbs)
    • 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: 3,988mm (157.0")
    • 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

    2021 GMC Sierra 1500 AT4: Premium Diesel Capability and Off-Road Performance

    The 2021 GMC Sierra 1500 AT4 Crew Cab delivers an exceptional balance of rugged off-road hardware, refined cabin comfort, and serious diesel efficiency. Built to tackle heavy workloads and tough terrain with equal confidence, this Four Wheel Drive pickup features a bold Gray exterior paired with a distinctive Jet Black interior accented by Kalahari details. Whether you are navigating demanding job sites around Bean Station or heading out for a weekend off the beaten path, the Sierra 1500 AT4 is engineered to handle demanding tasks while keeping you completely comfortable. Drivers seeking a capable truck that balances working utility with modern sophistication will find this crew cab ready for every challenge.

    Performance & Capability

    Under the hood, this 2021 GMC Sierra 1500 AT4 features the advanced Duramax 3L I-6 direct injection, DOHC, variable valve control, intercooled turbo, diesel engine with 277HP. Power is managed seamlessly through a smooth-shifting 10-Speed Automatic transmission and an AutoTrac part and full-time Four Wheel Drive system. This powertrain combination yields impressive efficiency for a full-size truck, achieving an EPA-estimated 22 MPG in the city and 26 MPG on the highway. Built for rugged trails and heavy hauling, the AT4 trim comes factory-equipped with an off-road suspension featuring Rancho shock absorbers, two underbody skid plates, a two-speed transfer case, and an automatic locking rear differential. Heavy-duty utility is further supported by an auxiliary external transmission oil cooler, engine block heater, and the ProGrade Trailering System with Hitch Guidance and Hitch View for straightforward trailer hookups.

    Technology & Connectivity

    Inside the quiet crew cab, intuitive technology keeps you seamlessly connected wherever your drive takes you. The dashboard centers around a Premium GMC Infotainment System featuring an eight-inch primary touchscreen monitor with multi-touch capability. Complete with Wireless Apple CarPlay and Wireless Android Auto integration, you can easily access navigation, playlists, and smartphone apps without cluttering the cabin with cords. Driver data is clearly displayed via the 4.2-inch diagonal color display Driver Information Center, while a six-speaker audio system delivers crisp sound for SiriusXM with 360L satellite radio. Multiple power sourcesâ€"including front USB ports, rear dual USB charging-only ports, a 120-volt instrument panel power outlet, and a 120-volt bed-mounted power outletâ€"ensure all your devices and job site tools stay powered throughout the day.

    Key Highlights

    • Duramax 3L Turbo-Diesel Engine - Delivers 277HP paired with a 10-speed automatic transmission for robust torque and efficiency.
    • Factory Off-Road Suspension - Features Rancho shock absorbers, skid plates, and elevated ride height for rough terrain.
    • ProGrade Trailering System - Includes Hitch Guidance with Hitch View and an integrated trailer brake controller.
    • Spray-On Bed Liner w/ AT4 Logo - Protects the truck bed from heavy gear, cargo, and job site wear.
    • GMC MultiPro Tailgate - Offers six versatile functions for effortless bed loading, access, and work station utility.
    • Perforated Leather-Appointed Seating - Heats and ventilates front bucket seats with Jet Black and Kalahari styling.
    • Wireless Smart Device Integration - Connects via Wireless Apple CarPlay and Android Auto on an eight-inch touchscreen.
    • Red Recovery Hooks - Signature front tow hooks designed for quick vehicle recovery in challenging off-road conditions.

    Visit Us

    At Rusty Wallace Kia Morristown, we make finding your next truck simple and straightforward. You can get pre-approved for financing online, see what your trade is worth in minutes, or browse our pre-owned inventory to explore all our available vehicles. Feel free to call us at (423) 200-5335 or stop by our showroom to take this 2021 GMC Sierra 1500 AT4 for a test drive today.

    All vehicle pricing includes all offers and incentives. Prices do not include additional fees and a government fee, taxes, finance charges, dealer documentation fees, emissions testing fees, or other fees. All prices, specifications, and availability are subject to change without notice. Contact dealer for the most current information.

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    Vehicle history report

    • Title information
    • Odometer readings
    • Accident data (if applicable)
    • Service history
    • Vehicle usage
    • Recall information (if applicable)
    • Warranty status
    Free CarFax report

    A name you can trust

    Rusty Wallace Kia Morristown is dedicated to your satisfaction before, during, and after your purchase. We'll go the extra mile to take care of you.
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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.…
    All reviews on KBB.com
    Based on 71 consumer ratings for 2019–2026 models. Privacy