Sun GMC · Wantagh, NY

2026 GMC Sierra 2500 HD AT4

0 miles · truck

Stock photo — actual vehicle may differ

1 / 7 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

TrimAT4

VIN1GT4UPEY0TF399491

Stock number29578G

BodyPickup

Engine6.6L V8 turbo

Cylinders8

Displacement6.6L

TransmissionAutomatic

Drivetrain4WD

FuelDiesel

ExteriorSummit White

Towing18500

Vehicle description

This GMC Sierra 2500HD boasts a Turbocharged Diesel V8 6.6L/ engine powering this Automatic transmission. TRANSMISSION, 10-SPEED AUTOMATIC, TRAILERING WIRING PROVISIONS, FOR TRAILERING, 5TH WHEEL AND GOOSENECK TRAILER includes additional 7-way wiring harness located at the rear of the pickup bed attached to the rear frame cross member, SNOW PLOW PREP/CAMPER PACKAGE includes (KW5) 220-amp alternator, includes increased front GAWR on Heavy Duty models, (NZZ) skid plates (transfer case and oil pan), pass through dash grommet hole and roof emergency light provisions. Contact GM Upfitter Integration at www.gmupfitter.com for plow installation details and assistance. Note: if ordered for Camper usage, recommend ordering (UY2) Trailering wiring provisions. This GMC Sierra 2500HD Features the Following Options AT4 PREMIUM PLUS PACKAGE includes (PDO) AT4 Preferred Package, (CF5) power sunroof, (CWM) Technology Package and (VXW) AT4 high clearance step, LPO , LPO, HARD FOLDING TRUCK BED COVER BY REALTRUCK ADVANTAGE (dealer-installed), GVWR, 11,350 LBS. (5148 KG), ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE (470 hp [350.5 kW] @ 2800 rpm, 975 lb-ft of torque [1322 Nm] @ 1600 rpm) (Includes (K05) engine block heater.), 3 YEARS SIRIUSXM, Wireless phone projection for Apple CarPlay and Android Auto, Wireless Charging, Wipers, front rain-sensing, Windows, power rear, express down, Windows, power front, drivers express up/down. Visit Us Today Come in for a quick visit at Sun Buick GMC, 3333 Sunrise Hwy, Wantagh, NY 11793 to claim your GMC Sierra 2500HD!

Features & options (250)

Adaptive Cruise Control
Bluetooth®
Heated Steering Wheel
Remote Start
4WD/AWD
Android Auto
Apple CarPlay
Keyless Ignition System
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
SiriusXM Trial Subscription
Wireless phone projection
For Apple CarPlay and Android Auto
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
SiriusXM with 360L Trial Subscription
Place and receive hands-free phone calls
3 Years SiriusXM
Enjoy channels curated by DJs, personalities, and tastemakers
Side Bed Step
Black textured step pads help provide secure footing
Deep-tinted glass
Provides added protection from sun and glare
Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
Body-color door handles
20" high gloss Black aluminum wheels
Rainsense automatic wipers
Spray-on bedliner
Includes GMC logo on all trims except PRO
18" LT275/70R18 all-terrain, blackwall spare tire
Cargo bed LED lighting
Provides light to find cargo in the bed
Black beltline moldings
Cab-mounted cargo area lamps
Activated by switch located on center switch bank
Illuminates the cargo bed area
Spare tire carrier lock
Helps keep spare tire secure
Cargo tie-downs
12-fixed rated at 500 lbs. per corner
Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
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
High gloss Black mirror caps
20" LT275/65R20 all-terrain, blackwall tires
Body-color front bumper
IntelliBeam
Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
LED taillamps with LED stop lights and animation
Rear wheelhouse liners
Tailgate with EZ Lift assist, power lock & release
Hitch area lighting
GMC MultiPro Tailgate
Power lock and release
CornerStep rear bumper
Located at each end of the rear bumper
Textured step pads to help provide secure footing
LED fog lamps
Body-color rear bumper
With integrated CornerSteps
Tailgate and bed rail protection caps
Winter Grille Cover
Off-Road High Clearance Steps
Textured step pads help provide secure footing
Power sunroof
Retracts into the roof
Offers tilt and slide features with express-open and -close
Summit White
Front license plate bracket
Smoked Amber LED roof marker lamps
Roof-mounted lamps near the front of the cab
Hard Folding Truck Bed Cover by RealTruck Advantage
Carpeted floor covering
Color-keyed to match the interior
Rear air vents
Provides cabin comfort for rear occupants
10-way power driver seat with power lumbar
Includes 8-way power driver seat
Includes a 2-way power lumbar control
You can always override the feature and take control
120-volt power outlet
3-prong auxiliary household-style outlet
Located on the instrument panel
Rear Seat Reminder
Ventilated driver and front passenger seats
Individually controlled
Cooling feature includes both seatbacks and cushions
Driver memory
Premium front floor liners with removable carpet insert
Power windows with driver and front passenger express-up/down
If obstruction is detected, the anti-pinch feature will auto-reverse
Theft-deterrent unauthorized entry system
Helps deter unauthorized entry, helping to protect your vehicle
Keyless Open and Start
Lockout protection helps you avoid locking keys in the vehicle
USB ports
(2) Data/charge ports located inside center console
Power door locks
12.3" diagonal color Driver Information Center
High definition display provides crisp, premium appearance
Assist handles
Front A-pillar mounted for Driver and Passenger
Rear B-pillar mounted
Front bucket seats
(2) Charge ports located on rear of console
Steering-wheel mounted controls
Power windows with driver express-up/down
Dual-zone automatic climate control
Allows individual climate settings for both driver and front passenger
Wireless Charging
Uses induction technology for select portable electronic devices
Convenient charging location
Compass
Located in instrument cluster
10-way power front passenger seat
Includes 8-way power front passenger seat
Premium rear floor liners with removable carpet insert
(2) First row, located on console
Inside rearview auto-dimming mirror
Seat trim, Perforated front Leather
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)
Power windows with rear express-down
Rear window defogger
Outside temperature display
Located in infotainment display
Front center console
Heated rear outboard seats
Passengers can manage heat settings with their own controls
Heated driver and front outboard passenger seats
120-volt box-mounted power outlet
Located in the pickup bed
Wrapped steering wheel
Manual tilt and telescoping steering column
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
Power sliding rear window with rear defogger
4-wheel antilock disc brakes
Heavy-Duty Air Filter
Hill Descent Control
Uses antilock braking to help provide a smooth, controlled descent
Activates by pushing a button below the instrument panel
Off-Road suspension
Brake pad wear indicator
Fully boxed frame
Hydroformed front section
High-strength steel
Push Button Start
Automatic locking rear differential
Red vertical recovery hooks
Two front frame-mounted
Pickup bed
Roll-formed high-strength steel
Includes bed assist step
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
Four wheel drive
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
Integrated trailer brake controller
Integrated with the antilock brake system (ABS)
Digital Variable Steering Assist
Heavy-duty dual batteries with 1460 cold-cranking amps
70 Amp-hr
Maintenance-free with rundown protection and retained accessory power
Trailering wiring provisions for camper, 5th wheel and gooseneck trailer
For trailering fifth-wheel and gooseneck trailers
11,350 lbs. GVWR
220-amp alternator
ProGrade Trailering System
Hitch Guidance with Hitch View
X31 Off-Road Package
Twin-tube Rancho shocks
Trailering Package
Trailer hitch
Trailering hitch platform
Hitch Guidance
Sierra HD Pro Safety
Forward Collision Alert
Following Distance Indicator
Front Pedestrian Braking
Buckle to Drive
Automatic Emergency Braking
AT4 Preferred Package
Rear sliding power window
LED roof marker lamps
AT4 Preferred Equipment Group includes standard equipment
AT4 Premium Plus Package
Technology Package
AT4 high clearance step
AT4 Preferred Package on AT4
Snow Plow Prep / Camper Package
Power feed to accommodate a backup and roof emergency light
A single 220-amp alternator
Heavy-duty front springs
Option/package discount
LED Daytime Running Lamps
Signature LED Daytime Running Lamps
Trailering Information Label
6 airbags
Dual-stage frontal airbags for driver and front outboard passenger
Head-curtain airbags for outboard seating positions
Seat Belt Adjustable Guide Loops

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

AutosXchange Intel

Vehicle price analysis

Live listings · within 50 miles of Wantagh, New York

Asking price$81,999Dealer asking price

Market value$77,904Market value · based on 19 comparable cars

vs. market+5.3%Not rated · stock photos only

Where this price sits

Among the highest-priced · 16% of 19 similar listings ask more than this car.

Market value $77,904

This car$81,999

$76,174lowest$84,664highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Not rated · stock photos only$4,095 above the market value of $77,904

Price range

$76,174$84,664

17th lowest price of 20 similar listings within 50 milesTick marks the market value · range of 19 similar listings

AutosXchange Insights

Compared with 19 new 2026 GMC Sierra 2500 AT4 listings within 50 mi.
Priced $4,095 above the market value of 19 comparable cars — compare options, condition and history.
17th lowest price of 20 similar listings within 50 miles.
Stock # 29578G — 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 11, 2026. No price change at this dealership since Nov 11 ($81,999).

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

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 AT4 · new · within 50 miles of Wantagh, New York. Showing the 12 nearest of 19 comparable cars for sale, nearest first.

Stock photo

7 photos