Brennan Buick GMC · Plattsburgh, NY

2026 GMC Sierra 2500 HD AT4

1 miles · truck

1 / 26 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

TrimAT4

VIN1GT4UPE75TF395007

Stock number260391

Mileage1 miles

BodyPickup

Engine6.6L 8-cyl

Cylinders8

Displacement6.6L

Horsepower401

TransmissionAutomatic

Drivetrain4WD

FuelGasoline

ExteriorOnyx Black

InteriorJet Black with Kalahari accents, Perforated Front

Doors4

Towing16000

Vehicle description

At Brennan Buick GMC, we're here for you throughout the life of your vehicle. If you're in the market for a new or used truck, SUV, or car, visit our dealership to see the best that Brennan Buick GMC has to offer. This 2026 GMC Sierra 2500HD AT4 delivers commanding performance and premium capability. Finished in Black with a 6.6L V8 engine and 4WD, this truck is built for serious work and adventure. Equipped with an impressive array of technology and comfort features, the AT4 stands ready to tackle any challenge. - LED Smoked Amber Roof Marker Lamps - Inside Rearview Auto-Dimming Rear Camera Mirror - Multicolor 15 Diagonal Head-Up Display - Power Sunroof - Power Sliding Rear Window with Defogger - AT4 Preferred Package and AT4 Premium Plus Package - Snow Plow Prep/Camper Package - Technology Package - Bose Premium 7-Speaker Sound System - Apple CarPlay/Android Auto The cabin combines rugged durability with refined comfort. Heated and ventilated leather front seats with 10-way power adjustment provide all-day support, while dual-zone climate control keeps everyone comfortable. The premium GMC Infotainment System with SiriusXM satellite radio keeps you connected, and wireless charging lets you stay powered up without cables. Off-road capability meets everyday convenience with Hill Descent Control, off-road suspension, and Ultrasonic Park Assist. The X31 Off-Road Package enhances your adventure potential, while advanced safety systems including Automatic Emergency Braking, Rear Cross Traffic Alert, and HD Surround Vision protect your journey. Experience this commanding Sierra 2500HD AT4 up close. Stop by our showroom today to drive this exceptional truck and discover why it's the choice for those who demand the best.

Features & options (169)

Basic
Corrosion
Maintenance
Roadside Assistance
Max seating capacity
Fuel System
Fuel tank capacity
Horsepower
Towing capacity
13.4" diagonal GMC Premium Infotainment System with Google built-in
Bluetooth
Bose Premium Sound System
SiriusXM with 360L Trial Subscription
Wi-Fi Hotspot capable
Wireless phone projection
18" LT275/70R18 all-terrain, blackwall spare tire
20" LT275/65R20 BF Goodrich off-road T/A K blackwall tires
20" high gloss Black aluminum wheels
Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
Black beltline moldings
Body-color door handles
Body-color front bumper
Body-color rear bumper
Cab-mounted cargo area lamps
Cargo bed LED lighting
Cargo tie-downs
CornerStep rear bumper
Deep-tinted glass
Front license plate bracket
GMC MultiPro Tailgate
High gloss Black mirror caps
IntelliBeam
LED fog lamps
Off-Road High Clearance Steps
Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
Power sunroof
Rainsense automatic wipers
Rear wheelhouse liners
Side Bed Step
Smoked Amber LED roof marker lamps
Spare tire carrier lock
Spray-on bedliner
Tailgate and bed rail protection caps
Tailgate with EZ Lift assist, power lock & release
10-way power driver seat with power lumbar
10-way power front passenger seat
12.3" diagonal color Driver Information Center
120-volt box-mounted power outlet
120-volt power outlet
Adaptive Cruise Control
Assist handles
Carpeted floor covering
Compass
Driver memory
Dual-zone automatic climate control
Front bucket seats
Front center console
Head-Up Display
Heated driver and front outboard passenger seats
Heated rear outboard seats
Heated steering wheel
Inside rearview auto-dimming mirror
Keyless Open and Start
Manual tilt and telescoping steering column
Outside temperature display
Power door locks
Power sliding rear window with rear defogger
Power windows with driver and front passenger express-up/down
Power windows with driver express-up/down
Power windows with rear express-down
Premium front floor liners with removable carpet insert
Premium rear floor liners with removable carpet insert
Rear Camera Mirror
Rear Seat Reminder
Rear air vents
Rear window defogger
Remote Start
Steering-wheel mounted controls
Theft-deterrent unauthorized entry system
USB ports
Universal Home Remote
Up-level rear seat with storage package
Upfitter switches
Ventilated driver and front passenger seats
Wireless Charging
Wrapped steering wheel
10,850 lbs. GVWR
10-speed automatic transmission
220-amp alternator
3.73 rear axle ratio
4-wheel antilock disc brakes
6.6L V8 Gas engine
Air filtration monitoring
Automatic locking rear differential
Autotrac 2-speed transfer case with push button controls
Auxiliary 700 cold-cranking amps battery
Brake pad wear indicator
Capless fuel fill
Digital Variable Steering Assist
External auxiliary transmission oil cooler
External engine oil cooler
Fully boxed frame
Heavy-Duty Air Filter
Heavy-duty 720 cold-cranking amps battery
Hill Descent Control
In-Vehicle Trailering App
Integrated trailer brake controller
Off-Road suspension
Pickup bed
Push Button Start
Red vertical recovery hooks
Skid plates
Trailering wiring provisions for camper, 5th wheel and gooseneck trailer
LED Daytime Running Lamps
Signature LED Daytime Running Lamps
6 airbags
Bed View Camera
Buckle to Drive
Following Distance Indicator
Forward Collision Alert
Front and Rear Park Assist
HD Surround Vision
Hitch Guidance
Hitch View
Lane Departure Warning
OnStar Basics
OnStar services capable
Rear Cross Traffic Alert
Rear Seat Belt Indicator
Safety Alert Seat
Seat Belt Adjustable Guide Loops
Teen Driver
Tire Pressure Monitoring System with Tire Fill Alert
Trailer Side Blind Zone Alert
Trailering Information Label
Trailering camera provisions
Automatic Emergency Braking
Front Pedestrian Braking
StabiliTrak, electronic stability control system with traction control
AT4 Preferred Package:
Rear sliding power window
LED roof marker lamps
AT4 Premium Plus Package:
Technology Package
AT4 high clearance step
May require additional optional equipment
ProGrade Trailering System:
Hitch Guidance with Hitch View
Sierra HD Pro Safety:
Snow Plow Prep / Camper Package:
Power feed to accommodate a backup and roof emergency light
A single 220-amp alternator
Heavy-duty front springs
Multi-color 15" Diagonal Head-Up Display
AT4 Preferred Package on AT4
Trailering Package:
Trailer hitch
Trailering hitch platform
X31 Off-Road Package:
Twin-tube Rancho shocks
AT4 Preferred Package
AT4 Premium Plus Package
ProGrade Trailering System
Sierra HD Pro Safety
Snow Plow Prep / Camper Package
Trailering Package
X31 Off-Road Package
In-vehicle Trailering App

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 Plattsburgh, New York

Asking price$77,715Dealer asking price · 1 mi

Market value$78,262Market value · based on 16 comparable cars

vs. market Fair price-0.7%Fair price · based on 16 comparable cars

Where this price sits

Among the lowest-priced · 81% of 16 similar listings ask more than this car.

Market value $78,262

This car$77,715

$74,817lowest$85,180highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Fair price$547 below the market value of $78,262

Price range

$74,817$85,180

3rd lowest price of 17 similar listings within 50 milesTick marks the market value · range of 16 similar listings

AutosXchange Insights

Compared with 16 new 2026 GMC Sierra 2500 AT4 listings within 50 mi.
Priced $547 below the market value of 16 comparable cars.
3rd lowest price of 17 similar listings within 50 miles.
About 1 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # 260391 — 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 9, 2026. No price change at this dealership since Nov 9 ($77,715).

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 Plattsburgh, New York. Showing the 12 nearest of 16 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD AT4 for sale at Brennan Buick GMC in Plattsburgh, NY

Fair pricePrice drop −$250

22 photos