Legacy GMC · Slidell, LA

2026 GMC Sierra 2500 HD Crew Cab Standard Box 4-Wheel Drive AT4

15 miles · truck

1 / 31 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

Trim4-Wheel AT4

VIN1GT4UPEY6TF339621

Stock number26G2453

Mileage15 miles

BodyPickup

Engine6.6L V8 turbo

Cylinders8

Displacement6.6L

TransmissionAutomatic

Drivetrain4WD

FuelDiesel

ExteriorCoastal Dune

Towing18500

Vehicle description

This outstanding example of a 2026 GMC Sierra 2500HD AT4 is offered by Legacy Buick GMC. This GMC includes: COASTAL DUNE GOOSENECK / 5TH WHEEL PREP PACKAGE LPO, HARD FOLDING TRUCK BED COVER BY REALTRUCK ADVANTAGE Pickup Bed Tonneau Cover ALTERNATORS, DUAL, 220-AMPS PRIMARY, 170-AMPS AUXILIARY TRANSMISSION, 10-SPEED AUTOMATIC A/T 10-Speed A/T LPO, 22" Aluminum Wheels GVWR, 11,350 LBS ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE Diesel Fuel 8 Cylinder Engine Turbocharged AT4 PREMIUM PLUS PACKAGE Generic Sun/Moonroof Sun/Moonroof Running Boards/Side Steps LPO, BODY COLOR WHEEL ARCH MOLDINGS LPO, BLACK BADGING PACKAGE *Note - For third party subscriptions or services, please contact the dealer for more information.* There's a level of quality and refinement in this GMC Sierra 2500HD AT4 that you won't find in your average vehicle. When GMC created this vehicle with 4 wheel drive, they immediately enhanced the performance ability. Easily switch between two and four wheel drive to take advantage of the improved traction. Based on the superb condition of this vehicle, along with the options and color, this GMC Sierra 2500HD AT4 is sure to sell fast. Dealer Disclosure: Prices do not include state and local tax, title, license, notarial fees, convenience fees, documentary fees, and any finance charges. All prices, specifications and availability subject to change without notice. Contact dealer for most current information .Not available with special finance, lease and some other offers.

Features & options (250)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Leather Seats
Wi-Fi Hotspot
Auto Dimming Mirror
Emergency Brake Assist
Lane Departure Warning
Wireless Phone Charging
Blind Spot Monitor
Forward Collision Warning
Navigation System
Parking Assistance
Rear View Camera
Tow Hitch/Tow Package
Automatic Climate Control
Entertainment System
Turbo Charged Engine
Premium Sound System
Wi-Fi Hotspot capable
May require additional optional equipment
13.4" diagonal GMC Premium Infotainment System with Google built-in
Bluetooth® streaming audio for music and select phones
Wireless Apple CarPlay capability for compatible phones
Wireless Android Auto capability for compatible phones
Customize and manage entertainment and vehicle feature setting
Voice-activated technology for phone
Wireless phone projection
For Apple CarPlay and Android Auto
Place and receive hands-free phone calls
SiriusXM Trial Subscription
SiriusXM with 360L Trial Subscription
Spare tire carrier lock
Helps keep spare tire secure
Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
Cargo tie-downs
12-fixed rated at 500 lbs. per corner
Cargo bed LED lighting
Provides light to find cargo in the bed
CornerStep rear bumper
Located at each end of the rear bumper
Textured step pads to help provide secure footing
Body-color door handles
Side Bed Step
Black textured step pads help provide secure footing
LED fog lamps
Black beltline moldings
Rear wheelhouse liners
Deep-tinted glass
Provides added protection from sun and glare
Body-color rear bumper
With integrated CornerSteps
Spray-on bedliner
Includes GMC logo on all trims except PRO
Tailgate with EZ Lift assist, power lock & release
Hitch area lighting
Body-color front bumper
Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
Chrome mirror caps
AT4 and AT4X features high gloss Black mirror caps
Power folding/extending
Lower convex mirrors
Heated upper glass
Integrated turn signal indicators
Puddle lamps
Perimeter lighting
Auxiliary lighting
Extends 3.31-inches
GMC MultiPro Tailgate
Power lock and release
Rainsense automatic wipers
Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
IntelliBeam
Tailgate and bed rail protection caps
Cab-mounted cargo area lamps
Activated by switch located on center switch bank
Illuminates the cargo bed area
Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
LED taillamps with LED stop lights and animation
High gloss Black mirror caps
18" LT275/70R18 all-terrain, blackwall spare tire
22" LT265/60R22E all-terrain blackwall tires
22" Transit steel, painted Black wheels
Coastal Dune
22" Gloss Black aluminum wheels
Black power-retractable assist steps with LED perimeter lighting
Textured step pads help provide secure footing
Retracts when not in use
Deploy Running Board mode for car wash cleaning
LED perimeter lighting
Body color wheel arch moldings
Smoked Amber LED roof marker lamps
Roof-mounted lamps near the front of the cab
Hard Folding Truck Bed Cover by RealTruck Advantage
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Winter Grille Cover
Rear Seat Reminder
Dual-zone automatic climate control
Allows individual climate settings for both driver and front passenger
Outside temperature display
Located in infotainment display
120-volt power outlet
3-prong auxiliary household-style outlet
Located on the instrument panel
120-volt box-mounted power outlet
Located in the pickup bed
Premium rear floor liners with removable carpet insert
Premium front floor liners with removable carpet insert
Seat trim, Perforated front Leather
You can always override the feature and take control
Front center console
Front bucket seats
10-way power front passenger seat
Includes 8-way power front passenger seat
Includes a 2-way power lumbar control
Heated driver and front outboard passenger seats
Individually controlled
Up-level rear seat with storage package
60/40 Full-length folding bench seat
Seatback storage on left and right side
Center fold out armrest with 2 cupholders
Underseat storage (full cab width)
12.3" diagonal color Driver Information Center
High definition display provides crisp, premium appearance
Power windows with driver and front passenger express-up/down
If obstruction is detected, the anti-pinch feature will auto-reverse
Assist handles
Front A-pillar mounted for Driver and Passenger
Rear B-pillar mounted
USB ports
(2) Charge ports located on rear of console
Theft-deterrent unauthorized entry system
Helps deter unauthorized entry, helping to protect your vehicle
Carpeted floor covering
Color-keyed to match the interior
Compass
Located in instrument cluster
Driver memory
Inside rearview auto-dimming mirror
Wireless Charging
Uses induction technology for select portable electronic devices
Convenient charging location
Power windows with driver express-up/down
Heated rear outboard seats
Passengers can manage heat settings with their own controls
Power windows with rear express-down
(2) Data/charge ports located inside center console
Keyless Open and Start
Lockout protection helps you avoid locking keys in the vehicle
Rear air vents
Provides cabin comfort for rear occupants
Power door locks
Ventilated driver and front passenger seats
Cooling feature includes both seatbacks and cushions
Steering-wheel mounted controls
Manual tilt and telescoping steering column
Rear window defogger
10-way power driver seat with power lumbar
Includes 8-way power driver seat
(2) First row, located on console
Wrapped steering wheel
Power sliding rear window with rear defogger
Head-Up Display
Multi-color 15" diagonal Head-Up Display
Adjustable vertical position and brightness of the display
Universal Home Remote
3-channel programmable
Jet Black with Kalahari accents, Perforated Front Leather seat trim
Rear Camera Mirror
The feature also allows brightness, vertical tilt and zoom adjustments
Hill Descent Control
Uses antilock braking to help provide a smooth, controlled descent
Activates by pushing a button below the instrument panel
Four wheel drive
Heavy-Duty Air Filter
Automatic locking rear differential
Red vertical recovery hooks
Two front frame-mounted
Integrated trailer brake controller
Integrated with the antilock brake system (ABS)
Fully boxed frame
Hydroformed front section
High-strength steel
Off-Road suspension
Skid plates
Help protect the front underbody, oil pan and transfer case
In-Vehicle Trailering App
Checklist
Trailer maintenance reminders
Trailer security alerts
Trailer mileage
Tow/haul reminder
Trailer electrical diagnostics
Digital Variable Steering Assist
4-wheel antilock disc brakes
Autotrac 2-speed transfer case with push button controls
4-button control 2WD, Auto, 4WD, 4WD LO
2WD High for most on-road and highway situations
Automatically engages 4WD until traction is regained
Brake pad wear indicator
Dual, 220 amp primary and 170 auxiliary amp alternators
Heavy-duty dual batteries with 1460 cold-cranking amps
70 Amp-hr
Maintenance-free with rundown protection and retained accessory power
11,350 lbs. GVWR
Emissions, Federal requirements
Gooseneck / 5th Wheel Prep Package
Hitch platform to accept Gooseneck or 5th wheel hitch
Box mounted 7-pin trailer harness
AT4 Premium Plus Package
AT4 Preferred Package
Technology Package
AT4 high clearance step
AT4 Preferred Package on AT4
AT4 Preferred Equipment Group includes standard equipment
Rear sliding power window
LED roof marker lamps
Option/package discount
LED Daytime Running Lamps
Signature LED Daytime Running Lamps
Trailering camera provisions
Includes connector for accessory wiring harness
Safety Alert Seat
You can also switch to beeping crash avoidance alerts
Trailer Side Blind Zone Alert
Hitch View
Shows a close-up view of the trailer hitch
Rear Cross Traffic Alert
Hitch Guidance
Can help you line up the hitch to your trailer
OnStar services capable
HD Surround Vision
Can help you park or avoid vehicles and objects
Buckle to Drive
Tire Pressure Monitoring System with Tire Fill Alert
Rear Seat Belt Indicator
Front and Rear Park Assist
These can help you park and avoid collisions
Trailering Information Label
OnStar Basics
Drive confidently with core OnStar services including
Remote commands
Built-in voice assistance
Real-time traffic and navigation

Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.

AutosXchange Intel

Vehicle price analysis

Live listings · nationwide

Asking price$84,130Dealer asking price · 15 mi

Market value$77,596Market value · based on 93 comparable cars

vs. market High price+8.4%High price · based on 93 comparable cars

Where this price sits

Among the highest-priced · 0% of 93 similar listings ask more than this car.

Market value $77,596

This car$84,130

$71,931lowest$84,130highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

High price$6,534 above the market value of $77,596

Price range

$71,931$84,130

94th lowest price of 94 similar listings nationwideTick marks the market value · range of 93 similar listings

AutosXchange Insights

Compared with 93 new 2026 GMC Sierra 2500 4-Wheel AT4 listings nationwide.
Priced $6,534 above the market value of 93 comparable cars — compare options, condition and history.
94th lowest price of 94 similar listings nationwide.
About 15 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # 26G2453 — mention it when you call or text.

How we calculate market value: comparable cars for sale now plus their last listed prices.

Price history

Price tracked by AutosXchange since Nov 6, 2026. No price change at this dealership since Nov 6 ($84,130).0 price changes at this dealership: $84,130 → $84,130.

AutosXchange Intel Hub: Price changes for this model in Louisiana · This model in the Intel Hub · Market movers in Louisiana

Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 12); earlier listings at other dealerships are shown by state only. Source: AutosXchange Intel Hub, autos-xchange.com/market.

Cars this price is compared to

Same 2026 Sierra 2500 4-Wheel AT4 · new · nationwide. Showing the 12 nearest of 93 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD Crew Cab Standard Box 4-Wheel Drive AT4 4-Wheel AT4 for sale at Legacy GMC in Slidell, LA

Fair price

30 photos