- Engine; Duramax 6.6L Turbo-Diesel V8; B20-Diesel Compatible
- At4 Preferred Package
- Lpo; Off-Road High Clearance Step
- Sunroof; Power
- Driver Alert Package I
- Gooseneck / 5Th Wheel Package
- Sun/Moonroof
- Leather Seats
- Navigation System
- Alternators; Dual; 220-Amps Primary; 170-Amps Auxiliary
- Lpo; Hitch Package
- Tires; Lt275/70R18; Mud-Terrain; Blackwall;
- Lpo; All-Weather Floor Liners; 1St And 2Nd Rows
- Bed View Camera
- High Idle Switch
- Engine Block Heater
- Keyless Start
- Lamps; Smoked Amber Roof Marker; (Led)
- Cooled Front Seat(S)
- At4 Preferred Equipment Group
- Audio System; Premium Gmc Infotainment System With Navigation And 8" Diagonal Color Touch-Screen
- Bose Sound System; Premium 7-Speaker System
- Emissions; Federal Requirements
- Exhaust Brake
- Front And Rear Park Assist; Ultrasonic
- Gooseneck / 5Th Wheel Prep Package -- Hitch Platform To Accept Gooseneck Or 5Th Wheel Hitch.
- Gvwr; 11;350 Lbs. (5148 Kg)
- Hd Surround Vision With Two Trailer View Camera Provisions
- Jet Black With Kalahari Accents; Perforated Front Leather Seat Trim
- Lane Change Alert With Side Blind Zone Alert
- License Plate Kit; Front
- Rear Axle; 3.42 Ratio
- Rear Cross Traffic Alert
- Seats; Front Bucket
- Summit White
- Transmission; Allison 10-Speed Automatic
- Universal Home Remote
- Wheels; 18" (45.7 Cm) Machined Aluminum Wheel
- Window; Power; Rear Sliding
- Winter Grille Cover
- Wireless Charging
Used 2023 GMCSierra 2500HD AT4
- Exterior Color
- Summit White
- Interior Color
- Jet Black With Kalahari Accents
- Odometer
- 63,029 miles
- Body/Seating
- Crew Cab Pickup/5 seats
- Transmission
- 10-Speed A/T
- Drivetrain
- Four Wheel Drive
- Engine
- 6.6 Liter Turbo
- VIN
- 1GT49PEYXPF256376
- Stock Number
- PF256376
Highlighted Features
- Navigation system
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Premium audio 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
Included Packages & Accessories
Standard Specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar and GMC connected services capable
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- 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: keyfob
- Remote keyless entry
- Speed control
- 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
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 8.0"
- 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 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
- 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
- Standard fuel economy fuel type: gasoline
- 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
- Engine displacement: 6.6 L
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,023mm (79.7")
- Exterior length: 6,352mm (250.1")
- 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: 1,013mm (39.9")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Towing capacity: 5,443kg (12,000lbs)
- Turning radius: 8.0m (26.3')
- Wheelbase: 4,037mm (158.9")
- Appearance: analog
- Blind spot: Lane Change Alert with Side Blind Zone Alert warning
- Compass
- Delay-off headlights
- Exterior parking camera cargo
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera rear
- Exterior parking camera right
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: UltraSonic front and rear
- 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
- 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
KBB.com Consumer Reviews
- 2.0
Transmission trash
By Jason on Monday, April 07, 2025
Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk - 3.0
Infotainment system unreliable!
By Brian C on Friday, June 27, 2025
The servicing dealer has been great, the GM engineers not so much! The truck will without warning have no sound for the radio and the blinkers. GM told the dealership to reprogram then when that didn't work they said replace the amplifier and when that didn't work, they said replace a module, and when that didn't work they said to replace the amplifier again, and when that didn't work they said we know it's a known problem but we don't know how to fix it. All of this with less than 9k miles. The dealer has done everything that GM has asked them to do, but none of it works. It's very frustrating to pay this much for a truck and you can't get the radio to stay working. It also got away from the factory with paint damage and a dent in the hood,( the dent is from the inside out on a double wall). I thought I was upgrading when I went from a F250 Lariat to a Denali, but I may have traded one headache for another. - 5.0
Fantastic truck
By Jjj on Sunday, November 07, 2021
This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck!
Can't find what you're looking for? Submit a request through
our CarFinder tool.
Accessories and color may vary. Quoted price subject to change without notice to correct errors or omissions. New vehicle pricing may already include applicable manufacturer incentives which may expire at any time. Manufacturer incentive data and vehicle features is provided by third parties and believed to be accurate as of the time of publication. Please contact the store by email or phone for details and availability of incentives. Dealer delivery and handling fee of $799 included in quoted price. Sales tax or other taxes, tag, registration fees, and government fees are not included in quoted price.
Certain data and other content displayed herein is copyrighted by AutoNation, Inc. and / or third parties. (In addition, providers of data and other materials to AutoNation, Inc. or such third parties may have a copyright interest in and to such data to the extent that such data and other materials are subject to copyright protection under applicable United States laws.) Such data may not be reproduced or distributed in whole or in part by any printed, electronic or other means without explicit written permission from AutoNation, Inc. All information is gathered from sources that are believed to be reliable, but no assurance can be given that this information is complete and neither AutoNation, Inc. nor its suppliers assume any responsibility for errors or omissions or warrant the accuracy of this information.
Displayed MPG is based on applicable EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid models only) and other factors.
