CASPER GMC CADILLAC · Casper, WY

2026 GMC Sierra 2500 HD AT4

0 miles · truck

1 / 18 photos

PUBLISHED DEALER DETAILS

Complete vehicle specifications

Year2026

MakeGMC

ModelSierra 2500 HD

TrimAT4

VIN1GT4UPEY8TF361104

Stock numberG7457

BodyPickup

Engine6.6L V8 turbo

Cylinders8

Displacement6.6L

Horsepower470

TransmissionAutomatic

Drivetrain4WD

FuelDiesel

ExteriorSummit White

InteriorJet Black with Kalahari accents, Perforated Front

Doors4

Towing18500

Vehicle description

Vehicle Details Discover the capability and premium comfort of the 2026 GMC Sierra 2500 AT4, now available in Casper, WY. Built to take on demanding jobs and serious off-road terrain, this heavy-duty pickup pairs 4WD confidence with a powerful 6.6L V8 Diesel engine for exceptional torque and dependable performance. The AT4 trim adds rugged style and advanced engineering, making it an ideal choice for drivers who need strength without sacrificing refinement. Inside, the cabin is designed for comfort and convenience. Enjoy Leather Seats, a Heated Steering Wheel, and Remote Start for added ease in changing Wyoming weather. Stay connected on the go with Apple CarPlay, while XM Radio provides a wide range of entertainment options for every drive. From long hauls to daily commutes, the GMC Sierra 2500 AT4 offers the technology and comfort expected from a premium heavy-duty truck. With bold styling, advanced features, and proven GMC durability, this 2026 GMC Sierra 2500 AT4 is ready for work, adventure, and everything in between. If you're searching for a powerful diesel truck in Casper, WY, this GMC Sierra 2500 AT4 deserves a closer look. Contact us today to learn more or schedule a test drive. Equipment Start this vehicle from inside with remote start. This GMC Sierra's Lane Departure Warning helps keep you in your lane. It's Cross-Traffic Alert: Safeguarding you from unexpected traffic when reversing. Bluetooth technology is built into this 3/4 ton pickup, keeping your hands on the steering wheel and your focus on the road. An off-road package is equipped on it. The leather seats in this 2026 GMC Sierra 2500 are a must for buyers looking for comfort, durability, and style. This 2026 GMC Sierra 2500 has automated speed control that adjusts to maintain a safe following distance, enhancing highway driving convenience. This model features steering wheel audio controls. This vehicle is equipped with the latest generation of XM/Sirius Radio. Keep your hands warm all winter with a heated steering wheel in this 3/4 ton pickup . This GMC Sierra offers Apple CarPlay for seamless connectivity. See what's behind you with the back up camera on this 3/4 ton pickup. Packages 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 Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; 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; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front

Features & options (177)

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
Assist handle, side
Black beltline moldings
Black lug nut and wheel lock kit
Black power-retractable assist steps with LED perimeter lighting
Body-color door handles
Body-color front bumper
Body-color rear bumper
Cab-mounted cargo area lamps
Cargo bed LED lighting
Cargo tie-downs
Cargo tie-downs (set of 4)
CornerStep rear bumper
Deep-tinted glass
Front license plate bracket
GMC MultiPro Tailgate
GMC MultiPro tailgate Step Lights
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 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
All-weather floor liners with AT4 logo
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
Sport pedal cover set
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
11,550 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 dual batteries with 1460 cold-cranking amps
High idle switch
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
AT4 Premium Plus Package:
Technology Package
AT4 high clearance step
May require additional optional equipment
Gooseneck Hitch Package:
Gooseneck ball
Chain tiedown kit with case
ProGrade Trailering System:
Hitch Guidance with Hitch View
Sierra HD Pro Safety:
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
Gooseneck Hitch 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 250 miles of Casper, Wyoming

Asking price$85,765Dealer asking price

Market value$83,984Market value · based on 46 comparable cars

vs. market Fair price+2.1%Fair price · based on 46 comparable cars

Where this price sits

In the typical middle range · 35% of 46 similar listings ask more than this car.

Market value $83,984

This car$85,765

$76,295lowest$89,211highest

Middle 50% of asking pricesMarket valueThis car

Price vs. market value

−25%Market value+25%

Fair price$1,781 above the market value of $83,984

Price range

$76,295$89,211

31st lowest price of 47 similar listings within 250 milesTick marks the market value · range of 46 similar listings

AutosXchange Insights

Compared with 46 new 2026 GMC Sierra 2500 AT4 listings within 250 mi.
Priced $1,781 above the market value of 46 comparable cars — compare options, condition and history.
31st lowest price of 47 similar listings within 250 miles.
Stock # G7457 — 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 ($85,765).

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 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 250 miles of Casper, Wyoming. Showing the 12 nearest of 46 comparable cars for sale, nearest first.

2026 GMC Sierra 2500 HD AT4 for sale at CASPER GMC CADILLAC in Casper, WY

Fair price

18 photos