Meet the 2025 GMC Sierra 2500HD AT4, a heavy-duty truck engineered to deliver both capability and refined comfort. This gray powerhouse combines serious work capacity with premium features designed to make every mileâ"whether on the job or the open roadâ"a confident experience.
- Duramax 6.6L V8 Turbodiesel engine with 470 hp and 975 lb-ft of torque
- AT4 Premium Plus Package with power sunroof and Technology Package
- Gooseneck/5th Wheel Prep Package for professional towing setup
- BF Goodrich off-road tires (LT275/65R20) for enhanced grip and durability
- Power-retractable assist steps with LED lighting
- Spray-on pickup bedliner with GMC logo
- HD Surround Vision and Bed View Camera with trailer provisions
- Bose Premium 7-Speaker sound system with SiriusXM 360L trial subscription
- Wireless phone projection and Apple CarPlay/Android Auto compatibility
- Heated and ventilated front seats with heated steering wheel
- Remote vehicle starter system and push-button start
- Multicolor 15-inch head-up display with trailer side blind zone alert
- Hill descent control and 2-speed active transfer case for off-road confidence
- 120-volt bed and instrument panel power outlets
- All-weather floor liners for first and second rows
The heart of this truck is its Duramax diesel engineâ"a proven workhorse that delivers substantial torque for towing and hauling. Paired with a 10-speed automatic transmission and four-wheel drive, this Sierra handles demanding terrain and heavy loads with authority. The 220-amp alternator and engine block heater ensure reliable performance in challenging conditions.
The AT4 Premium Plus Package elevates your experience with a power sunroof, advanced technology features, and the high-clearance step that defines the AT4 heritage. The included gooseneck hitch platform with bed-mounted 7-pin trailer harness prepares this truck for professional applications. Whether you're managing a job site or connecting a fifth wheel, this truck is ready.
Inside, the cabin reflects GMC's commitment to quality and function. Premium leather-appointed front seats offer heating and ventilation, while the 10-way power driver seat with lumbar adjustment ensures comfort during long hours behind the wheel. The automatic temperature control with dual-zone operation keeps everyone satisfied. The Bose sound system, wireless charging, and multiple USB ports integrate seamlessly into your mobile lifestyle.
Safety and visibility are prioritized throughout. The HD Surround Vision system, ultrasonic front and rear park assist, and rear cross traffic alert give you complete awareness of your surroundings. Automatic emergency braking, forward collision alert, and front pedestrian braking work alongside electronic stability control to help keep you safe. The inside rearview auto-dimming rear camera mirror and trailer side blind zone alert technology provide additional confidence.
Drive with conviction. The 2025 GMC Sierra 2500HD AT4 combines diesel power, premium comfort, and thoughtful capability in a truck built for those who expect more. Visit our showroom to experience this truck firsthand and discover why serious professionals choose serious trucks.
Used 2025 GMCSierra 2500 HD AT4
- Diesel
- Exterior Color
- Gray
- Interior Color
- Jet Black
- Odometer
- 47,137 miles
- Transmission
- 10 speed automatic
- Drivetrain
- 4WD
- Engine
- Duramax 6.6L V8 Turbodiesel
- VIN
- 1GT4UPEY6SF136629
- Stock Number
- 25T1245A
Included Packages & Accessories
- Gooseneck/5th Wheel Prep Package
- Hitch Package (LPO)
- 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 fro''nt side impact airbags
- Dual front 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
- 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
- 220-Amp Alternator
- Engine Block Heater
- Exhaust Brake
- Heavy-Duty 80 Amp Battery
- Auto-dimming door mirrors
- Bumpers: body-color
- Front License Plate Kit
- Gloss Black Header Grille & Grille Insert Bars
- Heated door mirrors
- IntelliBeam Automatic High Beam On/Off
- Off-Road High Clearance Step (LPO)
- Power door mirrors
- Power-Retractable Black Assist Steps
- Rear step bumper
- Spray-On Pickup Bedliner w/GMC Logo
- Turn signal indicator mirrors
- Winter Grille Cover
- 1st & 2nd Rows All-Weather Floor Liners (LPO)
- 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 Prem Floor Liners w/Removable Carpet Insert
- Front reading lights
- Heated steering wheel
- Illuminated entry
- Inside Rearview Auto-Dimming Rear Camera Mirror
- Outside temperature display
- Overhead console
- Passenger vanity mirror
- Rear Prem Floor Liners w/Removable Carpet Insert
- 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
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Front Center Armrest
- Heated Driver & Front Outboard Passenger Seats
- Heated front seats
- Heated rear seats
- Perforated Leather-Appointed Front Seat Trim
- Power passenger 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" High Gloss Black 8 Spokes Aluminum
- Power Front Passenger Windows w/Express Up/Down
- Power Sliding Rear Window w/Defogger
- Rain sensing wipers
- Variably intermittent wipers
- AT4 Preferred Package
- AT4 Premium Plus Package
- Preferred Equipment Group 4SB
- Technology Package
- X31 Off-Road Package
- Bose Premium 7-Speaker Sound System
- Steering Wheel Audio Controls
- Electric Rear-Window Defogger
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- Driver Memory
- Push Button Start
- Remote Vehicle Starter System
- Universal Home Remote
- Manual Tilt-Wheel/Telescoping Steering Column
- Off-Road Suspension
- Power Sunroof
- Hill Descent Control
- Unauthorized Entry Theft-Deterrent System
- 2-Speed Active Transfer Case
- LED Cargo Area Lighting
- LED Smoked Amber Roof Marker Lamps
- Rear Wheelhouse Liners
- 2 Charge-Only Rear USB Ports
- 2 Charge/Data USB Ports Inside Center Console
- 2 USB Ports
- Floor-Mounted Center Console
- HD Surround Vision
- Multicolor 15" Diagonal Head-Up Display
- OnStar Services Capable
- Rear Cross Traffic Alert
- Trailer Side Blind Zone Alert
- Wireless Charging
- Wireless Phone Projection
- Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Safety Alert Seat
- Deep-Tinted Glass
- Front Rain-Sensing Wipers
Detailed Specifications
- 1st and 2nd row curtain head airbags
- 4-wheel ABS Brakes
- ABS and Driveline Traction Control
- Adaptive cruise control
- Aluminum dash trim
- Aluminum/sim carbon fibre door trim
- Anti-theft alarm system
- Audio System Premium Brand Speakers: Bose
- Audio controls on steering wheel
- Automatic front air conditioning
- Auxilliary engine cooler
- Auxilliary transmission cooler
- Black aluminum rims
- Bluetooth wireless phone connectivity
- Braking Assist
- Bucket front seats
- Chrome center console trim
- Climate Controlled : Driver and passenger heated
- Compass
- Cruise controls on steering wheel
- Daytime running lights
- Driver seat memory
- Dual front air conditioning zones
- Dual illuminated vanity mirrors
- Electrochromatic auto-dimming mirrors
- Electrochromatic rearview mirror
- External temperature display
- Fold-up cushion rear seats
- Front Ventilated disc brakes
- Front and rear reading lights
- Front fog/driving lights
- Heated driver mirror
- Heated passenger mirror
- Heated steering wheel
- Leather seat upholstery
- Leatherette steering wheel trim
- Memorized Settings for 2 drivers
- Memorized Settings including door mirror(s)
- OnStar
- Passenger Airbag
- Power extendable trailer style exterior mirrors
- Power remote driver mirror adjustment
- Power remote passenger mirror adjustment
- Power retractable mirrors
- Power windows
- Premium GMC Infotainment System
- Privacy glass: Deep
- Rear seats center armrest
- Remote Engine Start : Keyfob remote start
- Remote activated exterior entry lights
- Remote power door locks
- Remote window operation
- Side airbag
- SiriusXM with 360L AM/FM/Satellite Radio
- SiriusXM with 360L Satellite Radio
- Speed-proportional power steering
- Split rear bench
- Stability controll with anti-roll
- Suspension class: Off-road
- Tachometer
- Tilt and telescopic steering wheel
- Tire Pressure Monitoring System: Tire specific
- Total Number of Speakers: 7
- Trailer hitch
- Trip computer
- Turn signal in mirrors
- Urethane shift knob trim
- Vehicle Emissions: Federal
- Video Monitor Location: Front
- Wheel Diameter: 20
- Wheel Width: 8.5
Standard Features
- AT4 Preferred Package
- Power Sunroof
- Technology Package
- Multicolor 15" Diagonal Head-Up Display
- Universal Home Remote
- LED Smoked Amber Roof Marker Lamps
- 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
- Steering Wheel Audio Controls
- LED Cargo Area Lighting
- Manual Tilt-Wheel/Telescoping Steering Column
- Unauthorized Entry Theft-Deterrent System
- Wireless Charging
- Rear Wheelhouse Liners
- Front Rain-Sensing Wipers
- X31 Off-Road Package
- 2-Speed Active Transfer Case
- Driver Memory
- Hill Descent Control
- Off-Road Suspension
Dealer Notes
KBB.com Consumer Reviews
²Units are available to order without dealer installed options listed above.
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