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Used 2021 GMC Sierra 1500 AT4 Truck Photo 1 of 27

Used 2021 GMCSierra 1500 AT4

    Exterior Color
    Onyx Black
    Interior Color
    Jet Black With Kalahari Accents
    Odometer
    59,655 miles
    Body/Seating
    Truck/5 seats
    Fuel Economy
    16/21 MPG City/Hwy
    Transmission
    10-Speed Automatic
    Drivetrain
    4WD
    Engine
    EcoTec3 5.3L V8
    VIN
    3GTP9EED8MG259012
    Stock Number
    12049T
    GMC Sierra 1500
    • CARFAX 1-Owner Great Value Badge

    Highlighted Features

    • 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

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    Included Packages & Accessories

    • 6 Speakers
    • AM/FM radio: SiriusXM with 360L
    • Premium audio system: GMC Infotainment System
    • Radio data system
    • Air Conditioning
    • Automatic temperature control
    • Front dual zone A/C
    • Rear window defroster
    • Memory seat
    • Power driver seat
    • Power steering
    • Power windows
    • Remote keyless entry
    • Steering wheel mounted audio controls
    • Speed-sensing steering
    • Traction control
    • 4-Wheel Disc Brakes
    • ABS brakes
    • Dual front impact airbags
    • Dual front side impact airbags
    • Front anti-roll bar
    • Front wheel independent suspension
    • Low tire pressure warning
    • Occupant sensing airbag
    • Overhead airbag
    • Brake assist
    • Electronic Stability Control
    • Delay-off headlights
    • Front fog lights
    • Fully automatic headlights
    • Panic alarm
    • Security system
    • Theft Deterrent System (Unauthorized Entry)
    • Speed control
    • Auto-dimming door mirrors
    • Bumpers: body-color
    • Heated door mirrors
    • Power door mirrors
    • Rear step bumper
    • 2 USB Ports (1st Row)
    • Apple CarPlay/Android Auto
    • Auto-dimming Rear-View mirror
    • Driver door bin
    • Driver vanity mirror
    • Front reading lights
    • Heated steering wheel
    • Illuminated entry
    • Outside temperature display
    • Overhead console
    • Passenger vanity mirror
    • Rear reading lights
    • Rear seat center armrest
    • Tachometer
    • Telescoping steering wheel
    • Tilt steering wheel
    • Trip computer
    • Voltmeter
    • Front Center Armrest
    • Heated 2nd Row Outboard Seats
    • Heated front seats
    • Perforated Leather-Appointed Front Seat Trim
    • Power passenger seat
    • Split folding rear seat
    • Ventilated front seats
    • Passenger door bin
    • 18" x 8.5" Machined Aluminum Wheels
    • Alloy wheels
    • Variably intermittent wipers
    • 3.23 Rear Axle Ratio
    • Driver Alert Package I
    • Preferred Equipment Group 4SB
    • Trailering Package
    • 6-Speaker Audio System Feature
    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
    • SiriusXM w/360L
    • Steering Wheel Audio Controls
    • Electric Rear-Window Defogger
    • 12-Volt Rear Auxiliary Power Outlet
    • 120-Volt Bed Mounted Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • Driver Memory
    • Power Front Passenger Windows w/Express Up/Down
    • Power Front Windows w/Driver Express Up/Down
    • Power Rear Windows w/Express Down
    • Remote Vehicle Starter System
    • Auto-Locking Rear Differential
    • Electrical Lock Control Steering Column
    • Manual Tilt-Wheel & Telescoping Steering Column
    • Off-Road Suspension
    • Keyless Open & Start
    • Power Door Locks
    • Hill Descent Control
    • Perimeter Lighting
    • 170 Amp Alternator
    • Auxiliary External Transmission Oil Cooler
    • Heavy-Duty Air Filter
    • Body-Color Surround Grille
    • LED Cargo Area Lighting
    • ProGrade Trailering System
    • Rear Wheelhouse Liners
    • Spray-On Pickup Bed Liner w/AT4 Logo
    • 2 USB Ports
    • 4.2" Diagonal Color Display Driver Info Center
    • 4G LTE Wi-Fi Hotspot Capable
    • Color-Keyed Carpeting Floor Covering
    • Compass
    • Floor-Mounted Center Console
    • Front Prem Floor Liners w/Removable Carpet Insert
    • GMC Connected Access Capable
    • HD Rear Vision Camera
    • Lane Change Alert w/Side Blind Zone Alert
    • OnStar & GMC Connected Services Capable
    • Rear Cross Traffic Alert
    • Rear Dual USB Charging-Only Ports
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • Ultrasonic Front & Rear Park Assist
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Front Bucket Seats
    • Heated Driver & Front Outboard Passenger Seating
    • Ventilated Driver & Front Passenger Seats
    • Hitch Guidance
    • Hitch Guidance w/Hitch View
    • In-Vehicle Trailering App
    • Integrated Trailer Brake Controller
    • Red Recovery Hooks
    • Deep-Tinted Glass

    Included Packages & Options

    • Driver Alert Package I$890
      • Ultrasonic Front & Rear Park Assist
      • Lane Change Alert w/Side Blind Zone Alert
      • Rear Cross Traffic Alert
      • Perimeter Lighting

    Detailed Specifications

    • 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

    Standard Features

    • Ultrasonic Front & Rear Park Assist
    • Lane Change Alert w/Side Blind Zone Alert
    • Rear Cross Traffic Alert
    • Perimeter Lighting
    • Radio: Premium GMC Infotainment Sys w/Multi-Touch
    • Floor-Mounted Center Console
    • Compass
    • 4.2" Diagonal Color Display Driver Info Center
    • Electric Rear-Window Defogger
    • Power Door Locks
    • Remote Vehicle Starter System
    • Keyless Open & Start
    • Color-Keyed Carpeting Floor Covering
    • Front Prem Floor Liners w/Removable Carpet Insert
    • OnStar & GMC Connected Services Capable
    • 4G LTE Wi-Fi Hotspot Capable
    • GMC Connected Access Capable
    • 12-Volt Rear Auxiliary Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • 2 USB Ports
    • Rear Dual USB Charging-Only Ports
    • HD Rear Vision Camera
    • Heated Driver & Front Outboard Passenger Seating
    • Ventilated Driver & Front Passenger Seats
    • Steering Wheel Audio Controls
    • Manual Tilt-Wheel & Telescoping Steering Column
    • Electrical Lock Control Steering Column
    • Power Front Windows w/Driver Express Up/Down
    • Power Front Passenger Windows w/Express Up/Down
    • Power Rear Windows w/Express Down
    • Spray-On Pickup Bed Liner w/AT4 Logo
    • Deep-Tinted Glass
    • Body-Color Surround Grille
    • LED Cargo Area Lighting
    • Red Recovery Hooks
    • Rear Wheelhouse Liners
    • Trailering Package
    • ProGrade Trailering System
    • 170 Amp Alternator
    • Heavy-Duty Air Filter
    • Auxiliary External Transmission Oil Cooler
    • Auto-Locking Rear Differential
    • Hill Descent Control
    • Off-Road Suspension
    • Integrated Trailer Brake Controller
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Driver Memory
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • 120-Volt Bed Mounted Power Outlet
    • 6-Speaker Audio System Feature
    • SiriusXM w/360L
    • Hitch Guidance
    • Hitch Guidance w/Hitch View
    • In-Vehicle Trailering App

    Dealer Notes

    2021 GMC SIERRA 1500 AT4 4WD 5.3L V8 LANCASTER PA

    RECENT ARRIVAL BUILT TO DOMINATE ON AND OFF THE ROAD

    This 2021 GMC Sierra 1500 AT4 4WD in Onyx Black delivers the perfect mix of factory off-road capability, V8 power, and premium GMC refinement. Powered by the proven EcoTec3 5.3L V8 paired with a 10-Speed Automatic transmission, this AT4 is built to tow hard, handle rough terrain, and still drive comfortably every day.

    With 8,312 miles BELOW market average, this is a standout opportunity in Lancaster County, Central Pennsylvania, Harrisburg, York, Reading, and the Mid-Atlantic region.

    This is not a basic pickup.
    This is AT4 purpose built.

    V8 POWER & REAL 4WD CAPABILITY

    • EcoTec3 5.3L V8 delivering strong torque and classic truck sound
    • 10-Speed Automatic transmission
    • Advanced 4WD system with locking rear differential
    • Hill Descent Control for off-road confidence
    • ProGrade Trailering System with integrated trailer brake controller

    WORK-READY AT4 FEATURES

    • Spray-in bedliner with AT4 logo
    • 120-volt bed-mounted power outlet
    • LED cargo bed lighting
    • Aggressive AT4 stance designed for dirt, snow, and job sites

    PREMIUM AT4 INTERIOR

    • Jet Black leather with Kalahari accents
    • Heated and ventilated front seats
    • Remote start and keyless entry
    • Quiet, comfortable cabin with upscale materials

    TECHNOLOGY & SAFETY

    • HD Rear Vision Camera
    • Front and rear park assist
    • Lane Change Alert with Side Blind Zone Alert
    • Rear Cross Traffic Alert

    WHY THIS SIERRA AT4 STANDS OUT

    This Sierra AT4 delivers real V8 muscle, factory off-road hardware, and premium interior comfort without stepping into new-truck pricing. Ideal for buyers who want a truck that works during the week, explores on the weekend, and looks right doing both.

    Power. Presence. Capability.
    AT4 done right.

    AVAILABLE NOW AT MARK MARTIN MOTORS LANCASTER, PENNSYLVANIA

    Serving serious truck buyers throughout Central PA and the surrounding Mid-Atlantic markets.


    NO HAGGLE PRICING - 106 POINT CERTIFIED INSPECTION FINANCING AVAILABLE NATIONWIDE - WE WELCOME YOUR TRADES NO PRICING GAMES WITH HIDDEN FEES! CALL US FOR YOUR OUT THE DOOR PRICE. Call Us Today @ 717-664-2222! We are located in Lancaster PA near Harrisburg and Philadelphia. Disclaimer: We do our best to make sure this information is accurate; however, we are not responsible for any errors or omissions contained on these pages. Please verify any information in question with Mark Martin Motors.

    KBB.com Consumer Reviews

    Kelley Blue Book - KBB.com
    Overall4Out of 5

    • Nice truck

      By froggy on Sunday, December 06, 2020

      3.0
      I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture.…

    • Great Truck

      By Mel on Sunday, April 25, 2021

      5.0
      I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that.…

    • Well done GM

      By Tony on Thursday, November 26, 2020

      5.0
      This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!…
    Based on 89 consumer ratings for 2019–2026 models. | Privacy
    Price
    $37,900
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