2026 GMC Sierra 2500 AT4X

Specifications, live market data, colors, and factory features.

1,523 for sale right now

$77,604 – $129,937

View Listings

Specifications

401

Horsepower

464

lb-ft Torque

Seats

$85k

Base MSRP

Performance

Engine: 6.6L V8 L5P
Horsepower: 401 hp
Torque: 464 lb-ft
Transmission: 10-Speed Automatic
Drivetrain: 4WD

Fuel & Efficiency

Fuel: Diesel
Fuel Tank: 36 gal

Dimensions

Length: 250.8″
Width: 81.9″
Height: 82.7″
Wheelbase: 159″
Curb Weight: 7,502 lbs

Body & Practicality

Body Style: Truck
Doors: 4
Seating: 5
Base MSRP: $85,200

Colors

Factory colors on 2026 GMC Sierra 2500 AT4Xs for sale now.

Exterior

Onyx Black(black)64
Summit White(white)43
Coastal Dune(brown)40
Sterling Metallic(silver)32
Sterling(silver)14
Volcanic Red Tintcoat(red)13
Dune(brown)13
Volcanic Red(red)9
White7
Black5

Interior

Obsidian Rush(black)245
Black (Obsidian Rush)(black)2
Obsidian Rush Full Grain Leather Seat Trim(brown)2
BLACK1
Obsidian Rush Full Grain(black)1
OBSIDIAN RUSH(black)1

Live Market Data

Computed from active 2026 GMC Sierra 2500 AT4X listings nationwide, updated continuously.

For sale now1,523

Median price$95,734

Average price$95,483

Price range$77,604 – $129,937

Median vs. MSRP+$10,534

Avg. days on market18

Avg. mileage1,005 mi

New / Used453 / 47

Price Distribution

Price vs. Mileage

Latest AT4X Listings

The newest 2026 GMC Sierra 2500 AT4Xs on the market.

View all 1,523 →

New 2026 GMC Sierra 2500

AT4X

$98,809

1 mi

Est. $1,422/mo*

1 day on market

WhiteBlack

Crain Buick GMC of Springdale

Springdale, AR

New 2026 GMC Sierra 2500

AT4X

$99,454

1 mi

Est. $1,431/mo*

1 day on market

RedBlack

Crain Buick GMC of Springdale

Springdale, AR

New 2026 GMC Sierra 2500

AT4X

$99,304

1 mi

Est. $1,429/mo*

1 day on market

BrownBlack

Crain Buick GMC of Springdale

Springdale, AR

New 2026 GMC Sierra 2500

AT4X

$99,055

8 mi

Est. $1,425/mo*

1 day on market

WhiteBlack

Glen Sain Chevrolet Buick GMC

Paragould, AR

New 2026 GMC Sierra 2500

AT4X

$99,304

1 mi

Est. $1,429/mo*

1 day on market

BlackBlack

Crain Buick GMC of Springdale

Springdale, AR

Used 2026 GMC Sierra 2500

AT4X

$84,146

12,738 mi

Est. $1,213/mo*

1 day on market

Black

Jeff Wyler Florence Buick GMC

Florence, KY

New 2026 GMC Sierra 2500

AT4X

$99,823

0 mi

Est. $1,436/mo*

1 day on market

BlackBlue

Husker Autogroup

Lincoln, NE

New 2026 GMC Sierra 2500

AT4X

$90,797

MSRP: $99,0908.4% off

0 mi

Est. $1,307/mo*

1 day on market

BlackBrown

Everett Buick GMC

Bryant, AR

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The median 2026 GMC Sierra 2500 AT4X lists for $95,734 today.

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Factory Features

Standard equipment from the window sticker, reviewed for accuracy.

Comfort & Convenience

Keyless Open and Start (push-button start)
Remote vehicle starter system
Universal Home Remote (3-channel)
Power door locks with lockout protection
Power windows with driver and front-passenger express-up/down; rear express-down
Power sliding rear window with defogger
Electric rear-window defogger
120-volt instrument-panel and bed-mounted power outlets
Multiple USB data/charge ports (console, center console interior, rear of console)
Compass and outside temperature display
Rain-sensing wipers
Power-retractable running boards
8 years OnStar Basics (terms apply)

Driver Assistance

Adaptive Cruise Control with trailering capability
HD Surround Vision with multiple selectable camera views
HD Rear Vision Camera
Hitch Guidance with Hitch View
Bed View Camera with trailer camera provisions
Rear Camera Mirror
Front and rear park assist
Trailer Side Blind Zone Alert
Rear Cross Traffic Alert
Lane Departure Warning
Following Distance Indicator
Automatic Emergency Braking and Front Pedestrian Braking

Entertainment

13.4 in diagonal Premium GMC Infotainment System with Google built-in (navigation and voice assistance apps)
Multi-touch color display; AM/FM
Wireless Apple CarPlay and Wireless Android Auto for compatible phones
Bluetooth streaming audio and hands-free phone
Bose Premium Series 12-speaker audio system
SiriusXM with 360L trial subscription
Wi-Fi hotspot capable (OnStar; terms apply)
Voice-activated phone and system controls
Steering-wheel-mounted audio controls

Exterior

18 in machined aluminum wheels with high-gloss black accents
35 in LT305/70R18 Goodyear Territory MT tires with matching spare
Spare tire carrier lock
Body-color front and rear bumpers with CornerStep rear bumper
GMC MultiPro six-function tailgate with EZ Lift, power lock/release, and hitch-area lighting
Spray-on bedliner with GMC logo
Power-folding/extending heated auto-dimming vertical trailering mirrors with high-gloss black caps, turn signals, puddle lamps, and perimeter lighting
Animated LED projector headlamps with LED turn signals and signature LED daytime running lamps
Animated LED signature taillamps
LED fog lamps
LED cargo-area lighting
Smoked amber LED roof marker lamps
IntelliBeam auto high-beam assist
Power sunroof (tilt/slide, express open/close)
Black power-retractable assist steps with LED perimeter lighting
Deep-tinted glass
Rainsense automatic windshield wipers
Rear wheelhouse liners
Gloss-black header grille and grille insert bars with dark nickel inserts
Black beltline moldings; AT4X exterior badging
12 fixed cargo bed tie-downs (500 lb per corner rating)
Side bed steps (integrated forward bed steps)

Interior

Obsidian Rush interior with full-grain leather seating, technical-grain leather accents, and authentic Vanta ash wood
16-way power heated and ventilated front bucket seats with power lumbar and massage
Driver seat and outside-mirror memory
Heated rear outboard seats
60/40 split-folding rear bench seat with underseat storage package
Dual-zone automatic climate control with rear air vents
Premium front and rear floor liners with removable carpet inserts
Leather-wrapped heated steering wheel with audio/phone controls
Manual tilt-and-telescoping steering column
12.3 in diagonal multicolor Driver Information Center
15 in multicolor Head-Up Display (includes off-road inclinometer)
Inside rearview auto-dimming Rear Camera Mirror
Floor-mounted center console with cupholders, phone storage, and power-cord management
Carpeted floor covering color-keyed to interior
Illuminated vanity mirrors; front and rear assist handles
Wireless smartphone charging

Mechanical & Performance

6.6L V8 gasoline engine (401 hp / 464 lb-ft) — standard; Duramax 6.6L turbo-diesel optional
Allison 10-speed automatic transmission
4WD only with Autotrac 2-speed transfer case (2HI / Auto / 4HI / 4LO)
Factory-installed 1.5 in off-road suspension lift with Multimatic DSSV dampers
Driver-selectable rear electronic-locking differential
Traction Select System with Off-Road and Tow-Haul modes
Hill Descent Control and Hill Start Assist
StabiliTrak electronic stability control with Trailer Sway Control
Digital Variable Steering Assist
Trailering Package with 2.5 in receiver hitch platform (2 in insert), 4- and 7-pin connectors
Integrated trailer brake controller
In-vehicle Trailering App
ProGrade trailering capability including Hitch Guidance with Hitch View
Heavy-duty air cleaner
170-amp alternator (gas); heavy-duty battery
120-volt power outlets (instrument panel and cargo bed)
Front aluminum skid plate and larger steel transfer-case skid plate
Fully boxed high-strength steel frame; roll-formed high-strength steel bed
4-wheel antilock disc brakes with DuraLife rotors and brake-pad wear indicator
Red front recovery hooks
Available max trailering up to 18,500 lbs (properly equipped)

Safety & Security

Sierra HD Pro Safety suite: Forward Collision Alert, Following Distance Indicator, Front Pedestrian Braking, IntelliBeam, Lane Departure Warning, Buckle to Drive, Automatic Emergency Braking
6 airbags (dual-stage front, front seat-mounted side-impact, head-curtain for outboard positions) with Passenger Sensing System
StabiliTrak with traction control
Safety Alert Seat
Teen Driver mode
Rear Cross Traffic Alert
HD Surround Vision
Ultrasonic front and rear park assist
Trailer Side Blind Zone Alert
Tire Pressure Monitoring System with Tire Fill Alert
Unauthorized-entry theft-deterrent system / alarm
Rear Seat Reminder
OnStar safety and security services (Automatic Crash Response and related core services per plan)

Warranty

Bumper-to-bumper limited warranty: 3 years / 36,000 miles (whichever comes first)
Powertrain limited warranty: 5 years / 60,000 miles on gas (5 years / 100,000 miles when equipped with Duramax diesel)
Roadside Assistance and Courtesy Transportation: 5 years / 60,000 miles on gas (5 years / 100,000 miles with Duramax diesel)
First scheduled maintenance visit included
Corrosion coverage: 3 years / 36,000 miles; rust-through 6 years / 100,000 miles (GM standard coverage)