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Used 2021 GMC Sierra 2500HD AT4 Truck Photo 1 of 2

Used 2021 GMCSierra 2500HD AT4

  • Diesel
    Exterior Color
    Summit White
    Interior Color
    Jet Black With Kalahari Accents
    Odometer
    87,197 miles
    Body/Seating
    Truck/5 seats
    Transmission
    10-Speed Automatic
    Drivetrain
    4WD
    Engine
    Duramax 6.6L V8 Turbodiesel
    VIN
    1GT49PEY9MF316806
    Stock Number
    12076T
    GMC Sierra 2500HD
    • Show Me the CARFAX Great Value Badge

    Highlighted Features

    • Leather upholstery
    • Automatic temperature control
    • Premium audio system
    • 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

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    Included Packages & Accessories

    • 6 Speakers
    • AM/FM radio: SiriusXM with 360L
    • Premium audio system: Premium GMC Infotainment 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
    • Pickup Box
    • Brake assist
    • Electronic Stability Control
    • Delay-off headlights
    • Front fog lights
    • Fully automatic headlights
    • Panic alarm
    • Security system
    • Speed control
    • 220 Amps Alternator
    • Engine Block Heater
    • Exhaust Brake
    • Heavy-Duty 80 Amp Battery
    • Auto-dimming door mirrors
    • Bumpers: body-color
    • Heated door mirrors
    • Power door mirrors
    • Rear step bumper
    • Turn signal indicator mirrors
    • Winter Grille Cover
    • 2 USB Ports (1st Row)
    • Apple CarPlay/Android Auto
    • Auto-dimming Rear-View mirror
    • Compass
    • 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 front seats
    • Heated rear seats
    • Perforated Leather-Appointed Front Seat Trim
    • Power passenger seat
    • Split folding rear seat
    • Ventilated front seats
    • Passenger door bin
    • Hitch Guidance w/Hitch View
    • In-Vehicle Trailering System App
    • Trailer Tire Pressure Monitor Sensors
    • 18" Machined Aluminum Wheels
    • Alloy wheels
    • Variably intermittent wipers
    • AT4 Preferred Package
    • Gooseneck/5th Wheel Package
    • Gooseneck/5th Wheel Prep Package
    • Preferred Equipment Group 4SB
    • X31 Off-Road Package
    • 6-Speaker Audio System Feature
    • Bose Premium 7 Speaker Sound System
    • HD Radio
    • Radio: AM/FM w/Premium GMC Infotainment System
    • Radio: Premium GMC Infotainment Sys w/Navigation
    • 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 Windows w/Driver Express Up/Down
    • Remote Vehicle Starter System
    • Universal Home Remote
    • Manual Tilt-Wheel/Telescoping Steering Column
    • Off-Road Suspension
    • Electrical Lock Control Steering Column
    • Keyless Open & Start
    • Power Door Locks
    • Hill Descent Control
    • Unauthorized Entry Theft-Deterrent System
    • 2-Speed Active Transfer Case
    • LED Cargo Area Lighting
    • LED Smoked Amber Roof Marker Lamps
    • Painted Black Surround Grille
    • Rear Wheelhouse Liners
    • Red Recovery Hooks
    • Spray-On Pickup Box Bed Liner w/AT4 Logo
    • 2 USB Ports
    • 2nd Row Dual USB Charge-Only Ports
    • 4.2" Diagonal Color Display Driver Info Center
    • 4G LTE Wi-Fi Hotspot Capable
    • Bed View Camera w/2 Trailer Camera Provisions
    • Compass Located In Instrument Cluster
    • Floor-Mounted Center Console
    • Front Prem Floor Liners w/Removable Carpet Insert
    • GMC Connected Access Capable
    • HD Rear Vision Camera
    • HD Surround Vision
    • OnStar & GMC Connected Services Capable
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • Wireless Charging
    • Wireless Phone Projection
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Front Bucket Seats
    • Heated & Ventilated Front Bucket Seats
    • Heated 2nd Row Outboard Seats
    • Heated Driver & Front Outboard Passenger Seats
    • Integrated Trailer Brake Controller
    • Deep-Tinted Glass
    • Power Front Passenger Windows w/Express Up/Down
    • Power Rear Windows w/Express Down
    • Power Sliding Rear Window w/Defogger

    Included Packages & Options

    • AT4 Preferred Package$2,075
      • Bed View Camera w/2 Trailer Camera Provisions
      • HD Surround Vision
      • Universal Home Remote
      • Power Sliding Rear Window w/Defogger
      • Radio: Premium GMC Infotainment Sys w/Navigation
      • Bose Premium 7 Speaker Sound System
      • LED Smoked Amber Roof Marker Lamps
      • Wireless Charging
    • Gooseneck/5th Wheel Package$795
      • Gooseneck/5th Wheel Prep Package
      • Bed View Camera w/2 Trailer Camera Provisions
    Included Options
    • 220 Amps Alternator$150
    • Engine Block Heater$100
    • Trailer Tire Pressure Monitor Sensors$50

    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
    • Single rear wheels
    • Speed-sensing steering
    • Tires: all-terrain
    • 1st row LCD monitors: 2
    • AM/FM radio: SiriusXM with 360L
    • Premium audio system: Premium GMC Infotainment System
    • Primary LCD size: 8.0"
    • Smart device integration: Android Auto/Apple CarPlay
    • Steering wheel mounted audio controls
    • Wireless phone connectivity: Bluetooth
    • Front center armrest
    • Front seats: bucket
    • Heated front seats
    • Heated rear 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 configuration: V-8
    • Drive type: four-wheel
    • Engine liters: 6.6L
    • Engine location: front
    • Fuel tank capacity: 36.0gal.
    • Hybrid traction battery type: none
    • Manual-shift auto
    • Mode select transmission
    • Rear locking differential
    • Standard fuel economy fuel type: gasoline
    • Variable valve control
    • Ground clearance (min): 257mm (10.1")
    • 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
    • Turn signal indicator mirrors
    • Exterior body width: 2,079mm (81.8")
    • Exterior height: 2,023mm (79.7")
    • Exterior length: 6,352mm (250.1")
    • 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: 1,013mm (39.9")
    • Rear hiproom: 1,530mm (60.2")
    • Rear legroom: 1,102mm (43.4")
    • Rear shoulder room: 1,659mm (65.3")
    • Turning radius: 8.0m (26.3')
    • Wheelbase: 4,037mm (158.9")
    • 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

    • Bed View Camera w/2 Trailer Camera Provisions
    • HD Surround Vision
    • Universal Home Remote
    • Power Sliding Rear Window w/Defogger
    • Radio: Premium GMC Infotainment Sys w/Navigation
    • Bose Premium 7 Speaker Sound System
    • LED Smoked Amber Roof Marker Lamps
    • Wireless Charging
    • Gooseneck/5th Wheel Prep Package
    • Bed View Camera w/2 Trailer Camera Provisions
    • 6-Speaker Audio System Feature
    • SiriusXM w/360L
    • HD Radio
    • Radio: AM/FM w/Premium GMC Infotainment System
    • Wireless Phone Projection
    • Floor-Mounted Center Console
    • Compass Located In Instrument Cluster
    • 4.2" Diagonal Color Display Driver Info Center
    • Electric Rear-Window Defogger
    • Power Door Locks
    • Remote Vehicle Starter System
    • Keyless Open & Start
    • Front Prem Floor Liners w/Removable Carpet Insert
    • Rear Prem Floor Liners w/Removable Carpet Insert
    • OnStar & GMC Connected Services Capable
    • 12-Volt Rear Auxiliary Power Outlet
    • 120-Volt Instrument Panel Power Outlet
    • 120-Volt Bed Mounted Power Outlet
    • 2 USB Ports
    • 2nd Row Dual USB Charge-Only Ports
    • HD Rear Vision Camera
    • Spray-On Pickup Box Bed Liner w/AT4 Logo
    • Heated Driver & Front Outboard Passenger Seats
    • Heated & Ventilated Front Bucket Seats
    • Heated 2nd Row Outboard Seats
    • Steering Wheel Audio Controls
    • Manual Tilt-Wheel/Telescoping Steering Column
    • Electrical Lock Control Steering Column
    • Unauthorized Entry Theft-Deterrent System
    • Deep-Tinted Glass
    • Painted Black Surround Grille
    • Power Windows w/Driver Express Up/Down
    • Power Front Passenger Windows w/Express Up/Down
    • Power Rear Windows w/Express Down
    • LED Cargo Area Lighting
    • Red Recovery Hooks
    • Rear Wheelhouse Liners
    • X31 Off-Road Package
    • Integrated Trailer Brake Controller
    • 2-Speed Active Transfer Case
    • 4G LTE Wi-Fi Hotspot Capable
    • GMC Connected Access Capable
    • 10-Way Power Driver Seat Adjuster w/Lumbar
    • 10-Way Power Passenger Seat Adjuster w/Lumbar
    • Driver Memory
    • Off-Road Suspension
    • Hill Descent Control

    Dealer Notes

    2021 GMC SIERRA 2500HD AT4 DURAMAX 4WD LANCASTER PA
    Summit White 6.6L Duramax Diesel Fully Loaded Heavy-Duty AT4

    This is the heavy-duty truck buyers search for.
    A 2021 GMC Sierra 2500HD AT4 4WD in Summit White, powered by the legendary 6.6L Duramax V8 Turbo Diesel paired with a 10-Speed Automatic transmission and loaded with premium AT4 equipment.

    Built for serious towing, off-road confidence, and luxury-level comfort in a real HD diesel platform.

    This is not a work truck.
    This is an AT4 Duramax powerhouse.

    6.6L DURAMAX DIESEL + HD 4WD CAPABILITY

    • 6.6L Duramax V8 Turbo Diesel
    • 10-Speed Automatic transmission
    • 4WD with 2-Speed Active Transfer Case
    • X31 Off-Road Package
    • Hill Descent Control
    • Integrated trailer brake controller

    MAX TRAILERING SETUP

    • Gooseneck / 5th-Wheel Prep Package
    • Bed View Camera with trailer camera provisions
    • HD Surround Vision
    • HD Rear Vision Camera
    • Built to haul equipment, RVs, and heavy loads with confidence

    AT4 PREMIUM INTERIOR COMFORT

    • Jet Black leather with Kalahari accents
    • Heated and ventilated front bucket seats
    • Heated second-row outboard seats
    • Floor-mounted center console
    • Wireless charging and wireless phone projection
    • Universal home remote

    AT4 EXTERIOR PRESENCE + FUNCTION

    • Painted black surround grille
    • Red recovery hooks
    • LED smoked amber roof marker lamps
    • Spray-in bedliner with AT4 logo
    • LED cargo bed lighting
    • Rear wheelhouse liners and deep-tinted glass

    TECHNOLOGY & INFOTAINMENT

    • Premium GMC infotainment system with navigation
    • Bose premium 7-speaker audio
    • Keyless open and push-button start
    • Remote start system
    • 4G LTE Wi-Fi hotspot capable

    WHY THIS SIERRA 2500HD AT4 STANDS OUT

    This truck delivers the full package:
    Duramax diesel strength, HD towing hardware, AT4 off-road toughness, and premium interior luxury in one of the most desirable heavy-duty pickups on the market.

    Diesel. Loaded. AT4. Ready to dominate.

    AVAILABLE NOW AT MARK MARTIN MOTORS LANCASTER, PENNSYLVANIA

    Serving diesel truck buyers across Central PA, Harrisburg, York, Reading, and the Mid-Atlantic region.


    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
    Overall3.8Out of 5

    • Transmission trash

      By Jason on Monday, April 07, 2025

      2.0
      Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk…

    • Infotainment system unreliable!

      By Brian C on Friday, June 27, 2025

      3.0
      The servicing dealer has been great, the GM engineers not so much! The truck will without warning have no sound for the radio and the blinkers. GM told the dealership to reprogram then when that didn't work they said replace the amplifier and when that didn't work, they said replace a module, and when that didn't work they said to replace the amplifier again, and when that didn't work they said we know it's a known problem but we don't know how to fix it. All of this with less than 9k miles. The dealer has done everything that GM has asked them to do, but none of it works. It's very frustrating to pay this much for a truck and you can't get the radio to stay working. It also got away from the factory with paint damage and a dent in the hood,( the dent is from the inside out on a double wall). I thought I was upgrading when I went from a F250 Lariat to a Denali, but I may have traded one headache for another.…

    • Fantastic truck

      By Jjj on Sunday, November 07, 2021

      5.0
      This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck!…
    Based on 13 consumer ratings for 2020–2026 models. | Privacy
    Price
    $51,000
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