2026 GMC Sierra 2500 AT4

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

4,335 for sale right now

$69,285 – $106,474

View Listings

Specifications

$72k

Base MSRP

Performance

Engine: 6.6L 6.6L Turbo-Diesel L5P
Transmission: 10-Speed Automatic
Drivetrain: 4WD

Fuel & Efficiency

Fuel: Diesel

Body & Practicality

Body Style: Truck
Doors: 4
Base MSRP: $72,200

Colors

Factory colors on 2026 GMC Sierra 2500 AT4s for sale now.

Exterior

Onyx Black(black)65
Summit White(white)62
Sterling Metallic(silver)33
Volcanic Red Tintcoat(red)22
Sterling(silver)21
Coastal Dune(brown)19
Dune(brown)18
Titanium Rush Metallic(silver)10
Gray7
Black6

Interior

Jet Black w/Kalahari Accents(black)178
Jet Black(black)87
Jet Black With Kalahari Accents(black)17
Jet Black with Kalahari accents(black)4
Jet Black With Kalahari Accents, Perforated Front Leather Seat T(black)2
Black2
Jet Black with Kalahari accents, Perforated Front Leather seat t(black)1

Live Market Data

Computed from active 2026 GMC Sierra 2500 AT4 listings nationwide, updated continuously.

For sale now4,335

Median price$82,211

Average price$82,094

Price range$69,285 – $106,474

Median vs. MSRP+$10,011

Avg. days on market20

Avg. mileage642 mi

New / Used470 / 30

Price Distribution

Price vs. Mileage

Latest AT4 Listings

The newest 2026 GMC Sierra 2500 AT4s on the market.

View all 4,335 →

New 2026 GMC Sierra 2500

AT4

$90,724

0 mi

Est. $1,306/mo*

2 days at this dealer

SilverBlack

Brookfield Buick GMC

Brookfield, WI

New 2026 GMC Sierra 2500

AT4

$85,646

1 mi

Est. $1,234/mo*

2 days at this dealer

RedJet Black

Patriot Buick GMC of Boyertown

Boyertown, PA

New 2026 GMC Sierra 2500

AT4

$90,389

0 mi

Est. $1,302/mo*

2 days at this dealer

Onyx BlackBlack

Bob Johnson Buick GMC South

Henrietta, NY

New 2026 GMC Sierra 2500

AT4

$92,504

0 mi

Est. $1,332/mo*

2 days at this dealer

Onyx BlackJet Black

Elk Grove Buick GMC

Elk Grove, CA

New 2026 GMC Sierra 2500

AT4

$105,117

2 mi

Est. $1,511/mo*

3 days at this dealer

Onyx BlackBlack

Bob Brockland Buick GMC

Columbia, IL

New 2026 GMC Sierra 2500

AT4

$73,902

0 mi

Est. $1,067/mo*

3 days at this dealer

Onyx BlackBlack

Dublin Buick GMC

Dublin, CA

New 2026 GMC Sierra 2500

AT4

$87,325

0 mi

Est. $1,258/mo*

3 days at this dealer

Summit WhiteBlack

York Chevrolet-Buick-GMC

Greencastle, IN

New 2026 GMC Sierra 2500

AT4

$86,999

1 mi

Est. $1,253/mo*

RedBlack

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The median 2026 GMC Sierra 2500 AT4 lists for $82,211 today.

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Factory Features

Standard equipment from the window sticker, reviewed for accuracy.

Comfort & Convenience

Keyless Open and Start with remote keyless entry
Remote vehicle starter system
Wireless phone charging
Power door locks
Power windows (driver/passenger express up/down; rear express down)
Rear-window electric defogger
120-volt power outlets (instrument panel and bed-mounted)
USB ports (charge/data in console; charge-only rear)
Center console with cup holders, phone storage, and power-cord management

Driver Assistance

Adaptive Cruise Control with trailering
Automatic Emergency Braking
Forward Collision Alert
Front Pedestrian Braking
Following Distance Indicator
Lane Departure Warning
IntelliBeam automatic high-beam assist
HD Surround Vision (overhead and multi-camera views; up to 14 available views)
Front and Rear Park Assist (ultrasonic)
Trailer Side Blind Zone Alert
Rear Cross Traffic Alert
Hitch Guidance and Hitch Guidance with Hitch View
Bed View Camera (CHMSL)
Trailer camera provisions and trailer viewing software

Entertainment

13.4-inch Premium GMC Infotainment System with Google built-in (navigation and voice assistance apps)
Wireless Apple CarPlay and wireless Android Auto
Bluetooth streaming audio
Bose premium 7-speaker sound system with Richbass woofer
SiriusXM with 360L capability (trial subscription)
Wi-Fi hotspot capable
AM/FM stereo

Exterior

Exclusive 20-inch high-gloss black aluminum wheels
LT275/65R20 all-terrain blackwall tires
LT275/70R18 all-terrain spare tire
AT4 grille and black beltline moldings
Body-color front and rear bumpers with CornerSteps
Body-color door handles
High-gloss black mirror caps
Red recovery hooks
GMC MultiPro Tailgate (six load/access functions)
Spray-on bedliner with GMC logo
Animated LED projector headlamps with LED turn signals and signature DRLs
IntelliBeam automatic high beams
Animated LED signature taillamps
LED fog lamps
LED cargo-area lighting (bed and cab-mounted)
Power-adjustable vertical trailering mirrors (heated and auto-dimming upper glass, lower convex mirrors, turn signals, puddle lamps, perimeter/auxiliary lighting, power folding/extending)
Deep-tinted glass
Rain-sensing front wipers
Black integrated bed step
Rear wheelhouse liners
Cargo tie-downs (500 lbs per corner)
Tire carrier lock
Tailgate and bed-rail protection caps
EZ Lift power lock/release tailgate with hitch-area light

Interior

Exclusive Jet Black interior with Kalahari accents
Perforated front leather seating surfaces
Front bucket seats with floor-mounted center console
10-way power driver and front passenger seats with lumbar
Heated driver and front outboard passenger seats
Ventilated driver and front passenger seats
Heated second-row outboard seats
Driver memory (power seat and outside mirrors)
60/40 folding rear bench with storage package (seatback storage, center armrest, under-seat storage)
Heated wrapped steering wheel
Manual tilt-and-telescoping steering column
Steering-wheel audio controls
Dual-zone automatic climate control with rear air vents
Auto-dimming inside rearview mirror
Premium floor liners with removable carpet inserts (front and rear)
Color-keyed carpeting
12.3-inch reconfigurable multicolor Driver Information Center
13.4-inch diagonal multicolor touchscreen
Compass and exterior temperature display
Rear Seat Reminder
Assist handles (front A-pillar and rear B-pillar)

Mechanical & Performance

6.6L V8 gas engine (401 hp / 464 lb-ft) — standard; Duramax 6.6L turbo-diesel available
10-speed automatic transmission
4WD with two-speed electronic Autotrac transfer case (push-button control)
3.73 rear axle ratio (gas engine)
Auto-locking rear differential
X31 Off-Road Package: off-road suspension with twin-tube Rancho shocks
Skid plates (oil pan, front axle, and transfer case)
Hill Descent Control
4-wheel antilock disc brakes with Duralife rotors
Digital Variable Steering Assist
Fully boxed frame (hydroformed front section)
Heavy-duty air filter and air filtration monitoring
External engine oil cooler
Auxiliary external transmission oil cooler
Heavy-duty 720-CCA battery with rundown protection
170-amp alternator (gas)
Capless fuel fill
Integrated trailer brake controller
Trailering Package (trailer hitch, 7-pin and 4-pin connectors, Hitch Guidance)
ProGrade Trailering System (Hitch Guidance with Hitch View and In-Vehicle Trailering App)
Tow/Haul mode
Push-button start

Safety & Security

Sierra HD Pro Safety suite
Dual-stage frontal airbags; seat-mounted side-impact airbags; head-curtain airbags (front and rear outboard)
StabiliTrak stability control with Proactive Roll Avoidance and traction control
Electronic trailer sway control
Hill Start Assist
Tire Pressure Monitoring System with Tire Fill Alert (auto learn)
Buckle to Drive
Teen Driver
Safety Alert Seat
Seat-belt adjustable guide loops (front)
Rear Seat Belt Indicator
Theft-deterrent system (unauthorized entry)
OnStar services capable / OnStar Basics hardware
LED signature daytime running lamps

Warranty

3 years / 36,000 miles bumper-to-bumper limited warranty
5 years / 60,000 miles powertrain limited warranty (gas); 5 years / 100,000 miles when equipped with Duramax 6.6L turbo-diesel
3 years / 36,000 miles corrosion protection (cosmetic)
6 years / 100,000 miles rust-through corrosion protection
5 years / 60,000 miles Roadside Assistance (gas); 5 years / 100,000 miles with Duramax diesel
Courtesy Transportation program (per GMC new-vehicle terms)