2025 GMC SIERRA 1500 AT4 4WD 3.0L DURAMAX DIESEL TECH PKG PREMIUM PKG THUNDERSTORM GRAY LANCASTER PA
If you're looking for one of the most desirable half-ton trucks GMC builds, this is it.
This 2025 GMC Sierra 1500 AT4 4WD combines the legendary 3.0L Duramax Turbo Diesel, premium luxury, advanced technology, and true off-road capability into one incredible package.
Finished in the rare Thunderstorm Gray, this Sierra stands out with its bold AT4 styling, black chrome grille, red recovery hooks, off-road stance, and aggressive factory appearance that turns heads everywhere it goes.
Under the hood is the highly sought-after 3.0L Duramax Turbo Diesel, paired with a smooth 10-speed automatic transmission. Known for outstanding fuel economy, incredible low-end torque, quiet operation, and impressive towing capability, it's one of the best all-around truck engines on the market.
Whether you're towing a camper, boat, enclosed trailer, or simply putting miles on every week, the Duramax delivers the perfect balance of power and efficiency.
The AT4 Premium Package and Technology Package make this truck feel every bit like a luxury SUV.
Perforated leather seating with Kalahari accents.
Heated and ventilated front seats.
Heated rear outboard seats.
Premium Bose audio.
Power sliding rear window.
Wireless charging.
Head-Up Display.
Rear Camera Mirror.
HD Surround Vision.
Every drive is comfortable, whether you're heading to work or across the country.
Built for adventure, the AT4 comes equipped with off-road suspension, Hill Descent Control, red recovery hooks, an automatic locking rear differential, off-road high-clearance steps, and GMC's advanced four-wheel-drive system.
When it's time to tow, this Sierra is ready.
Integrated Trailer Brake Controller.
Trailer Camera Provisions.
Trailer Side Blind Zone Alert.
Hitch Guidance with Hitch View.
In-Vehicle Trailering App.
Factory Trailering Package.
Everything you need to tow with confidence is already here.
Additional highlights include navigation, rain-sensing wipers, LED cargo lighting, spray-on bedliner, 220-amp alternator, 120-volt power outlets in the cab and bed, front and rear park assist, rear cross-traffic braking, and remote start.
And with over 12,000 miles below market average, this Sierra offers exceptional value while still providing years of dependable ownership ahead.
If you're searching for a 2025 GMC Sierra 1500 AT4 Duramax for sale in Pennsylvania, a 3.0L diesel truck near Lancaster, Ephrata, Lititz, Harrisburg, York, Reading, Lebanon, Allentown, Philadelphia, Baltimore, Maryland, New Jersey, or Delaware, this truck deserves a serious look.
Finding a 2025 Sierra AT4 equipped with the 3.0L Duramax Diesel, Technology Package, AT4 Premium Package, Head-Up Display, HD Surround Vision, Bose audio, and Thunderstorm Gray paint is exactly the type of truck buyers wait to find.
Available now at Mark Martin Motors in Ephrata, PA, proudly serving Lancaster County and customers nationwide.
Call or message Mark Martin Motors today before this incredible Sierra AT4 Duramax is gone.
2025 GMC Sierra 1500 AT4
- Used
- Diesel
Mark Martin Motors
Call 888-726-1782
We’re here to help
The overview
- Exterior Color
- Thunderstorm Gray
- Interior Color
- Jet Black
- Odometer
- 7,238 miles
- Body/Seating
- Truck/5 seats
- Fuel Economy
- 22/26 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4WD
- Engine
- 3.0L I6
- VIN
- 1GTUUEE80SZ215328
- Stock Number
- 12615FM
The highlights
- Navigation system
- 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
Notes from the dealer
The full specifications
- 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
- Heated steering wheel
- Illuminated entry
- Memory seat
- Navigation system
- 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
- Speed-sensing steering
- Tires: all-terrain
- 1st row LCD monitors: 2
- Primary LCD size: 13.4"
- Radio data system
- 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
- 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
- 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
- Transmission: 10 speed automatic
- Variable intake manifold
- Variable valve control
- Approach angle: 25 deg
- Departure angle: 26 deg
- Ground clearance (min): 279mm (11.0")
- Ramp breakover angle: 20 deg
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- 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: chrome
- Trailer hitch
- Trailer sway control
- Exterior body width: 2,063mm (81.2")
- Exterior height: 1,987mm (78.2")
- Exterior length: 6,134mm (241.5")
- Front headroom: 1,092mm (43.0")
- Front hiproom: 1,544mm (60.8")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,638mm (64.5")
- Greenhouse Gas Score (GG): 4
- Payload: 730kg (1,610lbs)
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,505mm (59.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,626mm (64.0")
- Turning radius: 7.7m (25.4')
- Wheelbase: 3,990mm (157.1")
- Appearance: analog
- Auto high-beam headlights
- Blind spot: Trailer Side Blind Zone Alert warning
- Compass
- Configurable
- Delay-off headlights
- 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 Keep Assist with Lane Departure Warning active
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: Front and Rear Park Assist 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 Braking mitigation
- Security system
- Traction control
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