Groulx Automotive · Monroe, MI

2026 GMC Sierra 2500 HD AT4

10 miles · truck · Listed 3 days ago on AutosXchange

Stock photo — actual vehicle may differ

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

TrimAT4

VIN1GT4UPE7XTF425943

Stock numberGT678

Mileage10 miles

BodyPickup

Engine6.6L 8-cyl

Cylinders8

Displacement6.6L

Horsepower401

TransmissionAutomatic

Drivetrain4WD

FuelGasoline

ExteriorSterling Metallic

InteriorJet Black with Kalahari accents, Perforated Front

Doors4

Towing16000

Vehicle description

The 2026 GMC Sierra 2500HD AT4 combines professional-grade capability with premium comfort in a crew cab, purpose-built for those who demand both power and refinement. This new truck arrives finished in Silver with a sophisticated Jet Black interior accented in Kalahari leather, creating a commanding presence whether on the job site or the highway. The 6.6L V8 paired with a 10-speed automatic transmission and 4WD delivers the performance and traction you need, while the AT4 Preferred Package and Gooseneck/5th Wheel Prep Package position this Sierra as the ideal platform for serious hauling and towing work. - Gooseneck/5th Wheel Prep Package with hitch platform - AT4 Preferred Equipment Group with off-road suspension - Heated and ventilated leather front seats with 10-way power adjustment - Premium Bose 7-speaker sound system with Apple CarPlay/Android Auto - HD Surround Vision with bed view and trailer camera provisions - Wireless charging and dual USB ports throughout - Heated rear seats and power sliding rear window - Automatic Emergency Braking with forward pedestrian protection - Remote vehicle starter system and keyless open/start - Ultrasonic front and rear park assist with trailer side blind zone alert The AT4's off-road suspension and Hill Descent Control provide excellent capability, while the comprehensive suite of safety features including lane departure warning, rear cross traffic alert, and automatic high-beam headlights helps keep you protected on every journey. This truck is built to work hard and look good doing it. Visit our showroom to experience the Sierra 2500HD AT4 firsthand. Groulx Automotive is a 3rd generation dealership in Monroe Michigan that has been in business for over 75 years. We value exceptional service and honesty. We would love an opportunity to earn your business.

Features & options (151)

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 all-terrain, 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
GMC MultiPro Tailgate
High gloss Black mirror caps
IntelliBeam
LED fog lamps
Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
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
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 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
Ventilated driver and front passenger seats
Wireless Charging
Wrapped steering wheel
10,850 lbs. GVWR
10-speed automatic transmission
170-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
Brake pad wear indicator
Capless fuel fill
Digital Variable Steering Assist
External auxiliary transmission oil cooler
External engine oil cooler
Fully boxed frame
Gooseneck / 5th Wheel Prep Package
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
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
ProGrade Trailering System:
Hitch Guidance with Hitch View
Sierra HD Pro Safety:
Trailering Package:
Trailer hitch
Trailering hitch platform
May require additional optional equipment
X31 Off-Road Package:
Twin-tube Rancho shocks
AT4 Preferred Package
ProGrade Trailering System
Sierra HD Pro Safety
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 Monroe, Michigan

Asking price$77,020Dealer asking price · 10 mi

Market value$77,075Market value · based on 30 comparable cars

vs. market-0.1%Not rated · stock photos only

Where this price sits

In the typical middle range · 50% of 30 similar listings ask more than this car.

Market value $77,075

This car$77,020

$72,304lowest$86,740highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Not rated · stock photos only$55 below the market value of $77,075

Price range

$72,304$86,740

16th lowest price of 31 similar listings within 50 milesTick marks the market value · range of 30 similar listings

AutosXchange Insights

Compared with 30 new 2026 GMC Sierra 2500 AT4 listings within 50 mi.
Priced $55 below the market value of 30 comparable cars.
16th lowest price of 31 similar listings within 50 miles.
About 10 miles per year of age (U.S. average is roughly 12,000–14,000).
Stock # GT678 — 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 ($77,020).

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

Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 15); 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 Monroe, Michigan. Showing the 12 nearest of 30 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD AT4 for sale at Groulx Automotive in Monroe, MI (stock photo)

New listingStock photo

1 photos