Vehicle Details
Built to conquer hard jobs and weekend adventures alike, this 2026 GMC Sierra 2500 AT4 delivers rugged capability, premium comfort, and standout style in one heavy-duty pickup. Powered by a formidable V8, 6.6L Diesel engine and backed by 4WD, this GMC Sierra 2500 AT4 is engineered for confident towing, hauling, and off-road performance. If you need a truck that works as hard as you do, this is the one to watch. Inside, the cabin is loaded with upscale features designed to keep every drive comfortable and connected. Enjoy Leather Seats, Apple CarPlay, and Hands Free Bluetooth for seamless access to your music, messages, and calls. The Back-Up Camera makes parking and hitching easier, while Adaptive Cruise Control adds extra confidence on long highway drives. The AT4 trim brings bold design, off-road readiness, and the refined interior GMC drivers appreciate. Whether you are shopping for a powerful diesel truck for the jobsite or a capable adventure machine for Louisiana roads, this 2026 GMC Sierra 2500 AT4 checks every box. Located in Breaux Bridge, LA, it is ready to impress with the strength, technology, and premium details today's truck shoppers want. If you are searching for a GMC Sierra 2500 AT4 4WD diesel in Breaux Bridge, LA, this impressive pickup deserves a closer look. Experience the confidence, capability, and comfort that make GMC heavy-duty trucks a top choice.
Equipment
This vehicle has auto-adjust speed for safe following. It's Cross-Traffic Alert: Safeguarding you from unexpected traffic when reversing. Start this unit from inside with remote start. This GMC Sierra features a hands-free Bluetooth phone system. It features a high end BOSE stereo system. Apple CarPlay: Seamless smartphone integration for it - stay connected and entertained on the go! Protect this 2026 GMC Sierra 2500 from unwanted accidents with a cutting edge backup camera system. It offers Android Auto for seamless smartphone integration. The leather seats in the vehicle are a must for buyers looking for comfort, durability, and style. This unit's Lane Departure Warning helps keep you in your lane. This model is pure luxury with a heated steering wheel. This vehicle gleams with an elegant silver clear coated finish. The GMC Sierra has a V8, 6.6L high output engine. This vehicle has four wheel drive capabilities. Quickly unlock this model with keyless entry.
New 2026 GMCSierra 2500 HD AT4
- Diesel
- Exterior Color
- Sterling
- Interior Color
- Jet Black
- Body/Seating
- Truck Crew Cab/5 seats
- Seats
- 5 seats
- Transmission
- 10-speed automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT4UPEY0TF347925
- Stock Number
- 26GB5134
Highlighted Features
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Power moonroof
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera front
- Exterior parking camera left
- Exterior parking camera right
- Exterior parking camera rear
Included Packages & Accessories
- 1st and 2nd Rows All-Weather Floor Liners
- Federal Emissions Requirements
- 3.42 Axle Ratio
- GVWR: 11,350 lbs
- Engine: Duramax 6.6L Turbo-Diesel V8
- Capped Fuel Fill
- 220-Amp Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- Transmission: 10-Speed Automatic
- AT4 Premium Plus Package
- AT4 Preferred Package
- Universal Home Remote
- Power Sliding Rear Window with Defogger
- LED Smoked Amber Roof Marker Lamps
- Power Sunroof
- Technology Package
- Inside Rearview Auo-Dimming Rear Camera Mirror
- Multicolor 15" Diagonal Head-Up Display
- Off-Road High Clearance Step
- Trailer Tire Pressure Monitor Sensors
- 22" Gloss Black Aluminum Wheels
- Wheels: 22" Painted Black Transit Steel
- Hitch Package
- High Idle Switch
- Rear Underseat Storage
- Tires: LT265/60R22E All-Terrain Blackwall
- Gooseneck/5th Wheel Prep Package
- GMC MultiPro Tailgate Step Lights
Detailed 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
- 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
- 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 tires: 265/60SR22.0E
- Front wheel independent suspension
- Power steering
- Rear tires: 265/60SR22.0E
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- Wheel size: 22"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 13.4"
- Satellite radio trial duration with new vehicle purchase (months): 3
- 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
- Basic warranty: 36 months/36,000miles
- Corrosion perforation warranty: 72 months/100,000miles
- Diesel engine warranty: 60 months/100,000miles
- Maintenance warranty: 12 months/ unlimited distance
- Powertrain warranty: 60 months/60,000miles
- Roadside assistance coverage: 60 months/60,000miles
- 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
- Electric motor 1 torque: none
- Electric motor horsepower: none
- Engine liters: 6.6L
- Engine location: front
- Fuel tank capacity: 36.0gal.
- Horsepower: 470hp @ 2,800RPM
- Hybrid electric powertrain type: none
- Hybrid system combined power torque: none
- Hybrid system net power: none
- 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: diesel
- 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: 3,661kg (8,071lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- 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: 1,013mm (39.9")
- 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: 1,467kg (3,235lbs)
- 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
- 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
- Tracker system: Stolen Vehicle Assistance
- Traction control
Dealer Notes
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