2026 GMC Sierra 3500 AT4

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

690 for sale right now

$67,345 – $119,999

View Listings

Specifications

Seats

$73k

Base MSRP

Performance

Engine: 6.6L V8 L5P
Transmission: 10-Speed Automatic
Drivetrain: 4WD

Fuel & Efficiency

Fuel: Diesel
MPG City: 0 mpg
MPG Highway: 0 mpg
Fuel Tank: 36 gal

Dimensions

Length: 266.8″
Width: 81.9″
Height: 80.8″
Wheelbase: 172″
Curb Weight: 7,529 lbs

Body & Practicality

Body Style: Truck
Doors: 4
Seating: 5
Base MSRP: $73,000

Colors

Factory colors on 2026 GMC Sierra 3500 AT4s for sale now.

Exterior

Onyx Black(black)61
Summit White(white)60
Sterling Metallic(silver)33
Titanium Rush Metallic(silver)15
Volcanic Red Tintcoat(red)14
Coastal Dune(brown)13
Sterling(silver)12
White Sand(white)11
White10
Gray10

Interior

Jet Black w/Kalahari Accents(black)121
Jet Black(black)114
Jet Black With Kalahari Accents(black)30
Jet Black with Kalahari accents(black)14
Jet Black with Kalahari accents, Perforated Front Leather seatin(black)4

Live Market Data

Computed from active 2026 GMC Sierra 3500 AT4 listings nationwide, updated continuously.

For sale now690

Median price$85,245

Average price$85,756

Price range$67,345 – $119,999

Median vs. MSRP+$12,245

Avg. days on market32

Avg. mileage912 mi

New / Used460 / 40

Price Distribution

Price vs. Mileage

Latest AT4 Listings

The newest 2026 GMC Sierra 3500 AT4s on the market.

View all 690 →

New 2026 GMC Sierra 3500

AT4

$76,348

MSRP: $82,9508% off

0 mi

Est. $1,101/mo*

4 days at this dealer

Silver

Sandy Sansing Chevrolet

Pensacola, FL

New 2026 GMC Sierra 3500

AT4

$75,348

MSRP: $81,9508.1% off

0 mi

Est. $1,087/mo*

4 days at this dealer

Gray

Sandy Sansing Chevrolet

Pensacola, FL

New 2026 GMC Sierra 3500

AT4

$90,255

MSRP: $90,5650.3% off

0 mi

Est. $1,300/mo*

4 days at this dealer

WhiteBlack

Alpine Buick GMC South

Colorado Springs, CO

New 2026 GMC Sierra 3500

AT4

$91,699

0 mi

Est. $1,320/mo*

4 days at this dealer

SilverBlack

Thompsons Buick GMC

Placerville, CA

New 2026 GMC Sierra 3500

AT4

$90,750

MSRP: $91,0600.3% off

0 mi

Est. $1,307/mo*

4 days at this dealer

BlackBlack

Alpine Buick GMC South

Colorado Springs, CO

New 2026 GMC Sierra 3500

AT4

$81,525

MSRP: $91,45510.9% off

2 mi

Est. $1,175/mo*

4 days at this dealer

GrayBlack

GMC of Vacaville

Vacaville, CA

New 2026 GMC Sierra 3500

AT4

$81,525

MSRP: $91,45510.9% off

2 mi

Est. $1,175/mo*

4 days at this dealer

BrownBlack

GMC of Vacaville

Vacaville, CA

New 2026 GMC Sierra 3500

AT4

$81,079

MSRP: $90,96010.9% off

2 mi

Est. $1,169/mo*

4 days at this dealer

WhiteBlack

GMC of Vacaville

Vacaville, CA

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The median 2026 GMC Sierra 3500 AT4 lists for $85,245 today.

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Factory Features

Standard equipment from the window sticker, reviewed for accuracy.

Comfort & Convenience

Keyless Open and Start
Remote keyless entry
Dual-zone automatic climate control
10-way power front seats with driver memory
Heated steering wheel
Heated front and rear outboard seats
Ventilated front seats
Premium floor liners
120-volt power outlets (bed and cabin)
Rear-window defogger
Rear Seat Reminder

Driver Assistance

Adaptive Cruise Control with trailering
HD Surround Vision (up to 14 camera views)
Front and Rear Park Assist
Trailer Side Blind Zone Alert
Following Distance Indicator
ProGrade Trailering System with in-vehicle trailering app

Entertainment

13.4-inch diagonal Premium GMC Infotainment System with Google built-in (including navigation capability)
12.3-inch diagonal color Driver Information Center
Wireless Apple CarPlay compatibility
Wireless Android Auto compatibility
Bluetooth connectivity
Bose premium sound system
SiriusXM with trial subscription
8 years of OnStar Basics

Exterior

Exclusive 20-inch gloss-black aluminum wheels
All-terrain tires (BFGoodrich off-road tires available)
AT4 exterior styling with unique grille
Animated LED projector headlamps
LED fog lamps
LED cargo-area lighting
Power-folding/extending heated trailering mirrors with auto-dimming
Red front recovery hooks
CornerStep rear bumper
GMC MultiPro multi-function tailgate
Spray-on bedliner
Rear wheelhouse liners
Rear-window defogger

Interior

Exclusive Jet Black interior with Kalahari accents
Heated and ventilated perforated front leather seating surfaces
10-way power front bucket seats
Heated front and rear outboard seats
60/40 split-folding rear bench seat with storage package
Driver seat and exterior mirror memory
Wrapped and heated steering wheel
Dual-zone automatic climate control
Premium floor liners

Mechanical & Performance

6.6L V8 gasoline engine (401 hp @ 5,200 rpm, 464 lb-ft @ 4,000 rpm)
Allison 10-speed automatic transmission
4WD
Auto-locking rear differential
2-speed Autotrac transfer case
Traction Select System with Off-Road and Tow/Haul modes
Off-road suspension with twin-tube Rancho shocks
Skid plates
Hill Descent Control
StabiliTrak electronic stability control with Trailer Sway Control and Hill Start Assist
Digital variable steering assist
Heavy-duty air cleaner
All-terrain tires
Brake pad wear monitoring
Trailering Package
Integrated trailer brake controller
In-vehicle trailering app / ProGrade Trailering System
120-volt power outlets (cargo bed and instrument panel)

Safety & Security

Automatic Emergency Braking
Forward Collision Alert
Front Pedestrian Braking
Following Distance Indicator
Lane Departure Warning
IntelliBeam auto high-beam headlamps
Safety Alert Seat
Rear Cross Traffic Alert
Trailer Side Blind Zone Alert
HD Surround Vision
Front and Rear Park Assist
Buckle to Drive
Teen Driver mode
Rear Seat Reminder

Warranty

3-year/36,000-mile Bumper-to-Bumper Limited Warranty
5-year/100,000-mile Powertrain Limited Warranty
Roadside Assistance and Courtesy Transportation (5 years/100,000 miles)
First maintenance visit included