2025 GMC Sierra 2500HD Denali

  • Used
  • Diesel
$74,900Price
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Mark Martin Motors
Location Details
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    The overview

    Exterior Color
    Summit White
    Interior Color
    Jet Black
    Odometer
    17,580 miles
    Body/Seating
    Truck/5 seats
    Transmission
    10-Speed Automatic
    Drivetrain
    4WD
    Engine
    Duramax 6.6L V8 Turbodiesel
    VIN
    1GT4UREY6SF308069
    Stock Number
    12661TN

      The highlights

      • Lane departure
      • Leather upholstery
      • Automatic temperature control
      • Emergency communication system
      • Wireless phone connectivity
      • Parking sensors
      • Exterior parking camera front
      • Exterior parking camera left
      • Exterior parking camera right
      • Exterior parking camera rear
      • Front dual zone A/C
      • Auto high-beam headlights

      Notes from the dealer

      2025 GMC SIERRA 2500HD DENALI 4WD DURAMAX 6.6L TURBO DIESEL V8 X31 OFF-ROAD GOOSENECK/5TH WHEEL PREP SUMMIT WHITE LANCASTER PA

      This 2025 GMC Sierra 2500HD Denali 4WD is powered by the legendary Duramax 6.6L Turbo Diesel V8 paired with a 10-speed Allison automatic transmission, delivering exceptional towing capability, effortless torque, and premium heavy-duty performance. Finished in Summit White, this Sierra is equipped with the X31 Off-Road Package, Gooseneck/5th Wheel Prep Package, and a Power Sunroof.

      The Duramax diesel remains one of the most respected heavy-duty truck engines on the market thanks to its impressive reliability, massive torque, and smooth towing performance. Whether you're hauling equipment, pulling a large fifth-wheel camper, or towing a horse trailer, it's built to handle demanding jobs with confidence while maintaining a refined driving experience.

      The Denali trim combines heavy-duty capability with premium comfort, featuring perforated leather seating, heated and ventilated front seats, heated rear outboard seats, HD Surround Vision, a Bose premium audio system, wireless phone projection, wireless charging, and a spacious crew cab designed for long days behind the wheel.

      The X31 Off-Road Package adds upgraded suspension, Hill Descent Control, skid plate protection, and off-road tuning for added confidence beyond the pavement. Factory trailer camera provisions, Trailer Side Blind Zone Alert, and the Gooseneck/5th Wheel Prep Package make this Sierra ready for serious towing from day one.

      With its legendary Duramax diesel, premium Denali interior, and factory towing equipment, this Sierra 2500HD is built to work hard while delivering the comfort and technology expected from GMC's flagship heavy-duty pickup.

      See this Sierra today at Mark Martin Motors in Ephrata, proudly serving Lancaster, Lititz, Lebanon, and York. Call or message us today to check availability or schedule your test drive.

      A closer look at what’s included

      • Preferred Equipment Group 5SA
        • Safety Alert Seat
        • Rear Cross Traffic Alert
        • Trailer Side Blind Zone Alert
        • Wireless Phone Projection
        • Bose Premium 7-Speaker Sound System
        • Floor-Mounted Center Console
        • Electric Rear-Window Defogger
        • Push Button Start
        • Remote Vehicle Starter System
        • OnStar Services Capable
        • 120-Volt Instrument Panel Power Outlet
        • 120-Volt Bed Mounted Power Outlet
        • 2 Charge-Only Rear USB Ports
        • 2 USB Ports
        • 2 Charge/Data USB Ports Inside Center Console
        • HD Surround Vision
        • Heated 2nd Row Outboard Seats
        • Deep-Tinted Glass
        • Signature Chrome Denali Grille
        • Steering Wheel Audio Controls
        • LED Smoked Amber Roof Marker Lamps
        • LED Cargo Area Lighting
        • Manual Tilt-Wheel/Telescoping Steering Column
        • Unauthorized Entry Theft-Deterrent System
        • Universal Home Remote
        • Wireless Charging
        • Rear Wheelhouse Liners
        • Front Rain-Sensing Wipers
        • X31 Off-Road Package
        • Polished Exhaust Tip
        • 2-Speed Active Transfer Case
      • Front Bucket Seats
        • Driver Memory
      • X31 Off-Road Package
        • Hill Descent Control
        • Off-Road Suspension
      Included Options
      • Gooseneck/5th Wheel Prep Package
      • 7 Speakers
      • AM/FM radio: SiriusXM with 360L
      • Radio: AM/FM w/Premium GMC Infotainment System
      • SiriusXM w/360L Trial Subscription
      • 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
      • Emergency communication system: OnStar
      • Front anti-roll bar
      • Front wheel independent suspension
      • Keyless Open & Start
      • Low tire pressure warning
      • Occupant sensing airbag
      • Overhead airbag
      • Power Sunroof
      • Pickup Box
      • Brake assist
      • Electronic Stability Control
      • Lane Departure Warning System
      • Auto High-beam Headlights
      • Delay-off headlights
      • Front fog lights
      • Fully automatic headlights
      • Panic alarm
      • Security system
      • Speed control
      • Heavy-Duty 80 Amp Battery
      • Auto-dimming door mirrors
      • Bumpers: body-color
      • Heated door mirrors
      • IntelliBeam Automatic High Beam On/Off
      • Power door mirrors
      • Rear step bumper
      • Spray-On Pickup Bedliner w/GMC Logo
      • Turn signal indicator mirrors
      • Apple CarPlay/Android Auto
      • Auto-dimming Rear-View mirror
      • Automatic Emergency Braking
      • Bed View Camera w/2 Trailer Camera Provisions
      • Buckle to Drive
      • Compass
      • Driver door bin
      • Driver vanity mirror
      • Following Distance Indicator
      • Forward Collision Alert
      • Front Pedestrian Braking
      • Front reading lights
      • Garage door transmitter
      • Genuine wood dashboard insert
      • Genuine wood door panel insert
      • 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
      • Trailer Cam Provisions & Trailer Viewing Software
      • Trip computer
      • Ultrasonic Front & Rear Park Assist
      • Voltmeter
      • 12-Way Power Driver Seat Adjuster w/Lumbar
      • 12-Way Power Passenger Seat Adjuster w/Lumbar
      • Forge Perforated Leather-Appointed Front Seat Trim
      • Front Center Armrest
      • Heated Driver & Front Outboard Passenger Seats
      • Heated front seats
      • Heated rear seats
      • Power passenger seat
      • Split folding rear seat
      • Ventilated Driver & Front Passenger Seats
      • Ventilated front seats
      • Passenger door bin
      • Hitch Guidance w/Hitch View
      • In-Vehicle Trailering System App
      • Alloy wheels
      • Wheels: 20" Ultra Bright Machined
      • Power Front Passenger Windows w/Express Up/Down
      • Power Sliding Rear Window w/Defogger
      • Rain sensing wipers
      • Variably intermittent wipers
      • 3.73 Rear Axle Ratio
      • SUNROOF! X31 OFFROAD PKG! 5TH WHEEL PREP!

      • Should you buy a ZR2 or a AT4X?


        Watch
      • 1-touch down
      • 1-touch up
      • Adaptive Cruise Control
      • Air conditioning
      • Auto-dimming rearview mirror
      • Automatic temperature control
      • Driver door bin
      • Driver vanity mirror
      • Emergency communication system: OnStar
      • Front beverage holders
      • Front dual zone A/C
      • Garage door transmitter
      • 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
      • Remote keyless entry
      • Speed control
      • Surround View Monitor: HD Surround Vision w/Hitch View yes
      • 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
      • Primary LCD size: 13.4"
      • Smart device integration: Apple CarPlay/Android Auto
      • Speaker type: Bose
      • Speakers: 7
      • Steering wheel mounted audio controls
      • Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
      • Wireless Phone Charger: front
      • Wireless phone connectivity: Bluetooth
      • Front center armrest
      • Front seats: bucket
      • Genuine wood dashboard insert
      • Genuine wood door panel insert
      • Heated front seats
      • Heated rear seats
      • Leather upholstery
      • Max seating capacity: 5
      • Power 4-way driver lumbar support
      • Power 4-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
      • Transmission: 10 speed automatic
      • Variable valve control
      • Ground clearance (min): 257mm (10.1")
      • Auto-dimming door mirrors
      • Bedliner
      • Bumpers: body-color
      • Door mirrors: chrome
      • Heated door mirrors
      • Hitch Class: IV
      • Left rear passenger door: conventional
      • Power door mirrors
      • Rear cargo: tailgate
      • Rear step bumper
      • Right rear passenger: conventional
      • Skid plates
      • Tailpipe finisher: polished
      • Trailer hitch
      • Trailer sway control
      • Turn signal indicator mirrors
      • Engine displacement: 6.6 L
      • Exterior body width: 2,079mm (81.8")
      • Exterior height: 2,027mm (79.8")
      • Exterior length: 6,369mm (250.8")
      • 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: 1,659mm (65.3")
      • Turning radius: 8.0m (26.3')
      • Wheelbase: 4,039mm (159.0")
      • Appearance: digital/analog
      • Auto high-beam headlights
      • Blind spot: Trailer Side Blind Zone Alert warning
      • Compass
      • Configurable
      • Delay-off headlights
      • Exterior parking camera cargo
      • Exterior parking camera front
      • Exterior parking camera left
      • Exterior parking camera rear: HD Rear Vision Camera w/Hitch View yes
      • Exterior parking camera right
      • Front fog lights
      • Front reading lights
      • Fully automatic headlights
      • Lane departure: Lane Departure Warning warning
      • Low tire pressure warning
      • Oil pressure gauge
      • Outside temperature display
      • Parking sensors: UltraSonic front and rear
      • Rain sensing wipers
      • 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
      • Forward collision: Forward Collision Alert with Automatic Braking mitigation
      • Front pedestrian detection: prevention
      • Ignition disable
      • Occupant sensing airbag
      • Overhead airbag
      • Panic alarm
      • Perimeter/approach lights
      • Rear collision: Rear Cross-Traffic Alert warning
      • Security system
      • Traction control