CASPER GMC CADILLAC · Casper, WY

2026 GMC Sierra 3500 HD AT4

0 miles · truck

1 / 17 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 3500 HD

TrimAT4

VIN1GT4UVEY7TF399749

Stock numberG7524

BodyPickup

Engine6.6L V8 turbo

Cylinders8

Displacement6.6L

Horsepower470

TransmissionAutomatic

Drivetrain4WD

FuelDiesel

ExteriorOnyx Black

InteriorJet Black with Kalahari accents, Perforated Front

Doors4

Towing20000

Vehicle description

Vehicle Details Discover capability, confidence, and refinement in this 2026 GMC Sierra 3500 AT4 4WD with the powerful V8, 6.6L Diesel engine, now available in Casper, WY. Built for demanding jobs and serious towing, this heavy-duty pickup delivers rugged performance, bold AT4 styling, and premium comfort in one impressive package. Whether you are hauling equipment, heading off-road, or cruising through Wyoming highways, the GMC Sierra 3500 AT4 is engineered to handle it all with strength and control. Inside, you'll find modern convenience features designed to elevate every drive. Remote Start helps you get going quickly in any season, while Adaptive Cruise Control and Lane Departure Warning add confidence on long trips and busy roads. A Back-Up Camera makes parking and maneuvering easier, and XM Radio keeps entertainment close at hand wherever the road leads. If you are searching for a dependable heavy-duty truck in Casper, WY, this 2026 GMC Sierra 3500 AT4 deserves your attention. With 4WD traction, diesel power, and advanced technology, it is ready for work, adventure, and everyday driving. Contact us today to learn more or schedule your test drive. See why this heavy-duty GMC truck stands out for towing, jobsite confidence, and comfort, all while delivering the capability Wyoming drivers expect from a premium diesel pickup in every season. Equipment The steering wheel audio controls on this unit keep the volume and station within easy reach. Keep your hands warm all winter with a heated steering wheel in the vehicle . This unit's Lane Departure Warning helps keep you in your lane. See what's behind you with the back up camera on this 2026 GMC Sierra 3500. The leather seats in this vehicle are a must for buyers looking for comfort, durability, and style. This GMC Sierra is equipped with the latest generation of XM/Sirius Radio. Start the vehicle from inside with remote start. An off-road package is installed on this unit so you are ready for your four-wheeling best. Engulf yourself with the crystal clear sound of a BOSE sound system in the GMC Sierra. This GMC Sierra has auto-adjust speed for safe following. This model is outfitted with an OnStar communication system. This unit has a V8, 6.6L high output engine. Packages Technology Package: Multicolor 15" Diagonal Head-Up Display; Auto-Dimming Inside Rearview Mirror with Camera. Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Camera Provisions; Electric Rear-Window Defogger; Floor-Mounted Center Console; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Premium Front Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Premium Rear Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Windows with Passenger Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On

Features & options (164)

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
Assist handle, side
Black Sport steps
Black beltline moldings
Body-color door handles
Body-color front bumper
Body-color rear bumper
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
Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
Power sliding rear window with rear defogger
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
Winter Grille Cover
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
In-Vehicle Trailering App
Keyless Open and Start
Manual tilt and telescoping steering column
Outside temperature display
Power door locks
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 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-speed automatic transmission
12,250 lbs. GVWR
3.42 rear axle ratio
4-wheel antilock disc brakes
6.6L Duramax Turbo-Diesel V8 engine
Air filtration monitoring
Automatic locking rear differential
Autotrac 2-speed transfer case with push button controls
Brake pad wear indicator
Capped fuel fill
Diesel exhaust brake
Digital Variable Steering Assist
Dual, 220 amp primary and 170 auxiliary amp alternators
Engine block heater
External auxiliary transmission oil cooler
External engine oil cooler
Fully boxed frame
Gooseneck / 5th Wheel Prep Package
Heavy-Duty Air Filter
Heavy-duty 730 cold-cranking amps battery
High idle switch
Integrated trailer brake controller
Off-Road suspension
Pickup bed
Push Button Start
Red vertical recovery hooks
Skid plates
Trailering Information Label
LED Daytime Running Lamps
Signature LED Daytime Running Lamps
6 airbags
Bed View Camera
Buckle to Drive
Following Distance Indicator
Forward Collision Alert
Front Pedestrian Braking
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
Rear Seat Reminder
Safety Alert Seat
Seat Belt Adjustable Guide Loops
Teen Driver
Tire Pressure Monitoring System with Tire Fill Alert
Trailer Side Blind Zone Alert
Trailering camera provisions
Automatic Emergency Braking
Hill Descent Control
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:
Technology Package:
Multi-color 15" Diagonal Head-Up Display
AT4 Preferred Package on AT4
May require additional optional equipment
Trailering Package:
Trailer hitch
Trailering hitch platform
X31 Off-Road Package:
Twin-tube Rancho shocks
AT4 Preferred Package
ProGrade Trailering System
Sierra HD Pro Safety
Technology 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 250 miles of Casper, Wyoming

Asking price$84,700Dealer asking price

Market value$87,029Market value · based on 11 comparable cars

vs. market Fair price-2.7%Fair price · based on 11 comparable cars

Where this price sits

Among the lowest-priced · 91% of 11 similar listings ask more than this car.

Market value $87,029

This car$84,700

$84,260lowest$95,640highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Fair price$2,329 below the market value of $87,029

Price range

$84,260$95,640

2nd lowest price of 12 similar listings within 250 milesTick marks the market value · range of 11 similar listings

AutosXchange Insights

Compared with 11 new 2026 GMC Sierra 3500 AT4 listings within 250 mi.
Priced $2,329 below the market value of 11 comparable cars.
2nd lowest price of 12 similar listings within 250 miles.
Stock # G7524 — 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 8, 2026. No price change at this dealership since Nov 8 ($84,700).

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

Dealer-advertised asking prices as observed by AutosXchange (data as of Nov 14); 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 3500 AT4 · new · within 250 miles of Casper, Wyoming. All 11 comparable cars for sale, nearest first.

2026 GMC Sierra 3500 HD AT4 for sale at Spearfish GMC in Spearfish, SD

Fair price

36 photos