Used 2025 GMC Sierra 1500 AT4
- Truck
- Pickup
- Crew Cab
- Condition
- Used
- Mileage
- 19,779miles
- Aggregate Ratings
- 44 out of 5 stars
- Generation
- 4(2019 - 2026)
- Trim
- AT4
- Drivetrain
- 4X4
- Transmission
- 10-Speed Shiftable Automatic
- Exterior Color
- Summit White (White)Factory Paint Code:GAZ
- Interior Color
- Jet Black W Kalahari Accents (Black)Factory Paint Code:HVD
- Size Segment
- 1/2 Ton
- Doors
- 4
- Max Seating
- 5
- Max Towing Capacity
- 8,900lbs.
- Weight Class
- 6,000-10,000 lbs. (2)
- NHTSA Safety Ratings
- 55 out of 5 stars
- Final Assembly Point
- Fort Wayne, Indiana
- VIN
- 1GTUUEE8XSZ136863
Engine3L I6 Diesel 305hp
- Fuel Type:Diesel
- Max Horsepower:305 hp @ 3750 rpm
- Max Torque:495 ft.lbf @ 2750 rpm
- Brand:Duramax
- Displacement:3liters
- Block Type:I
- Cylinders:6
- Aspiration:Turbo
- Fuel Induction:Common Rail Direct Injection
- Redline:5,250rpm
- Oil Capacity:6.6liters
- Cam Type:DOHC
- Stroke:3.54
- Bore:3.3
- Valves:24
Message from the seller
AT4 off-road capability. Premium interior. Only 19k miles and ready for the Northwest.
This New Arrival One Owner 2025 GMC Sierra 1500 AT4 blends off-road capability with high-end comfort, powered by a strong drivetrain and upgraded with the X31 Off-Road Suspension package. Whether it’s heading up into the mountains, dealing with winter weather, or just daily driving with confidence, this truck is built to handle it all.
Includes Warranty Protection for Life and Oil Changes for Life.
Performance & Capability:
• X31 Off-Road Suspension w/ 2'' Lift
• 2-Speed Autotrac Transfer Case
• Auto Locking Rear Differential
• Skid Plates
• Hill Descent Control
• Trailer Brake Controller
Exterior Highlights:
• 20'' Aluminum Wheels w/ All-Terrain Tires
• MultiPro Tailgate
• Spray-In Bedliner
• LED Lighting Package
• Power Sliding Rear Window
• Power Folding Tow Mirrors
Interior & Comfort:
• Heated & Ventilated Front Seats
• Heated Rear Seats
• Heated Steering Wheel
• Power Seats w/ Memory
• Premium Interior Trim
Technology & Driver Assist:
• 13.4'' Touchscreen w/ Google Built-In
• 12.3'' Digital Driver Display
• Bose Premium Sound System
• Wireless Apple CarPlay & Android Auto
• Head-Up Display
• Remote Start
Safety & Driver Alerts:
• Adaptive Cruise Control
• Forward Collision Alert
• Lane Keep Assist
• Blind Zone Alert w/ Trailer Coverage
• Rear Cross Traffic Braking
• HD Surround Vision
This AT4 stands out with its combination of off-road capability and premium features — a great fit for everything from mountain drives to everyday use around town. Low miles, one owner, and loaded with the right equipment.
Sunset Ford of Sumner, just off of Highway 410 down the hill from Bonney Lake, part of the Sunset Auto Family.
The exclusive home of Warranty Protection for Life — a limited Powertrain Warranty that’s honored at any ASE-certified repair facility in the U.S. and Canada. Available on all qualifying new and pre-owned vehicles for as long as you own it.
This Used 2025 GMC Sierra 1500 AT4 is available for drivers in Tacoma, Seattle, Kent, Puyallup, Renton, Auburn, Federal Way, Lakewood ...


