This pristine, one-owner, accident-free 2025 GMC Sierra 2500HD AT4 in bold Onyx Black is a premium heavy-duty pickup engineered for serious capability, luxury, and off-road prowess. Powered by the legendary Duramax 6.6L V8 Turbodiesel delivering massive torque and towing power, it pairs with a smooth 10-speed automatic transmission and robust 4WD system featuring a 2-speed active transfer case, Hill Descent Control, and the X31 Off-Road Package for enhanced ground clearance and trail performance. A fresh oil change has been completed, and it stands out with gloss black grille accents, LED smoked amber roof marker lamps, deep-tinted glass, off-road high clearance steps (LPO), spray-on bedliner with GMC logo, and LED cargo area lightingready for work, towing, or adventure.
The upscale cabin features Jet Black with Kalahari accents leather, ventilated and heated driver and front passenger seats, heated second-row outboard seats, a power sunroof, floor-mounted center console, and premium front and rear floor liners. Tech highlights include a massive multicolor 15" diagonal head-up display, Bose premium 7-speaker sound system, wireless charging, wireless phone projection, SiriusXM w/360L, steering wheel audio controls, and advanced connectivity with multiple USB ports, 120-volt outlets, and OnStar services. Safety and convenience abound with HD Surround Vision, Bed View Camera, trailer provisions, rear cross traffic alert, trailer side blind zone alert, ultrasonic park assist, and the Safety Alert Seat.
Loaded with the AT4 Preferred Package, AT4 Premium Plus Package, Technology Package, Max Trailering Package, Gooseneck/5th Wheel Prep Package, and more, this top-trim Sierra 2500HD AT4 combines GMC's renowned durability, heavy-duty towing/hauling strength, and refined luxury in an off-road-capable package. It's the ultimate choice for those seeking a powerful, feature-packed diesel truck that's low-maintenance, trail-ready, and built for demanding lifestyles or long-haul confidence.
Used 2025 GMCSierra 2500HD AT4 Truck Crew Cab
- Diesel
- Exterior Color
- Onyx Black
- Interior Color
- Jet Black
- Odometer
- 12,131 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- V-8 cyl
- VIN
- 1GT4UPEY3SF321530
- Stock Number
- D1766A
Highlighted Features
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Power moonroof
- 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
Standard 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
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Moonroof sunshade: manual
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power moonroof
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob and smart device (subscription required)
- 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
- 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
- Compressor: intercooled turbo
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Horsepower: 470hp @ 2,800RPM
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 32
- Rear locking differential
- Recommended fuel: Diesel
- Standard fuel economy fuel type: gasoline
- Torque: 975 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 257mm (10.1")
- 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
- Trailer hitch
- Trailer sway control
- Turn signal indicator mirrors
- Compression ratio: 16.00 to 1
- Curb weight: 3,733kg (8,229lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine horsepower: 470hp @ 2,800RPM
- Engine torque: 975 lb.-ft. @ 1,600RPM
- 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")
- GVWR: 5,148kg (11,350lbs)
- Payload: 1,398kg (3,083lbs)
- 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")
- Towing capacity: 8,391kg (18,500lbs)
- 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
- Heads up display
- 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
Dealer Notes
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. A negotiable administration fee, up to $464, may be added to the price of the vehicle.
* Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.