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New 2026 GMC Sierra 3500 AT4 Crew Cab

Stock #G26-1142

Window Sticker

Chassis Details

Stock Number

G26-1142

Stock Type

New

Year

2026

Make

GMC

Model

Sierra 3500

Class

GVWR

12,250

Drivetrain

4WD

Cab Type

Crew

Vehicle Trim

AT4

Interior Color

Jet Black with Kalahari accents, Perforated Front Leather seating surfaces

Seating Capacity

Exterior Color Description

Summit White

Engine Cylinder Count

Engine

6.6L Duramax Turbo-Diesel V8 engine

Transmission Type

Automatic

Fuel Type

Diesel

Engine Model

L5P

Engine Size (L)

6.6

Horsepower

470

Brake Type

Hydraulic

Vehicle Options

Bed Step, Black integrated on forward portion of bed on driver and passenger side
Steering, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
Floor covering, color-keyed carpeting
In-Vehicle Trailering App System, includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert when (PTT) trailer tire pressure monitor sensors are installed.)
Air filter, heavy-duty
Transfer case, two-speed active electronic Autotrac with push button control
OnStar Services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.)
Grille, Gloss Black header and grille insert bars with Black chrome accents
Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance
Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver
Window, power front, drivers express up/down
Cooling, external engine oil cooler
Theft-deterrent system, unauthorized entry
Rear Cross Traffic Alert
Rear Seat Reminder
Fog lamps, LED
Safety Alert Seat
Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
SiriusXM with 360L Trial Subscription. SiriusXM with 360L transforms your customers' ride with our most extensive and personalized radio experience on the road. (IMPORTANT: The SiriusXM trial subscription is not provided on vehicles that are ordered for Fleet Daily Rental ("FDR") use. Trial subscription is subject to the SiriusXM Customer Agreement and privacy policy, visit siriusxm.com which includes full terms and how to cancel. All fees, content, features, and availability are subject to change. Some features require GM connected vehicle services.)
Suspension, Off-Road includes twin-tube shocks
Indicator-Seat Belt WARNING, Rear Seat (Requires Crew Cab or Double Cab model.)
Brake lining wear indicator
Exterior Temperature Display located in radio display
Trailer Side Blind Zone Alert
USB Ports, 2, Charge/Data ports located inside center console
Mirror caps, high gloss Black
Keyless Open and Start includes remote keyless entry
Door locks, power
Seat adjuster, driver 10-way power including lumbar
Premium Floor Liners with removable carpet insert, front
Bumper, front, body-color lower
Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
Bedliner, Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Available with Ship Thru code (SQE), (TCE) or (TCH), not available with any other Ship Thru code.)
Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
Seats, front bucket with center console (STD)
Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
USB ports, (2) charge-only, rear
Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
IntelliBeam, automatic high beam on/off (Included and only available with (PDI) Sierra HD Pro Safety.)
Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt
Push Button Start
Auto-locking rear differential
Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety)
Steering wheel audio controls
Air conditioning, dual-zone automatic climate control
Recovery hooks, Red
Wireless Charging
Bluetooth for phone connectivity to vehicle infotainment system
Cargo tie downs (12), fixed, rated at 500 lbs per corner
Bose Sound System, premium 7-speaker system with Richbass woofer
Driver memory, recalls driver "presets" for power driver seat and outside mirrors
Compass, located in instrument cluster
GMC Premium information Display- 13.4" diagonal Multicolor touch screen
Wireless Phone Projection for Apple CarPlay and Android Auto
Seat adjuster, passenger 10-way power including lumbar
Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
Premium Floor Liners with removable carpet insert, rear
USB Ports, 2 (first row) located on console
Wheelhouse liners, rear
Cooling, auxiliary external transmission oil cooler
Air filtration monitoring
Headlamps, Animated LED projectors, LED turn signals and Daytime Running Lamps
Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width underseat storage, (includes child seat top tether anchor)
Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
Tire Pressure Monitoring System auto learn, includes Tire Fill Alert (does not apply to spare tire)
Tires, LT275/65R20 all-terrain, blackwall (STD) (Requires single rear wheels.)
Windows, power rear, express down
Seat trim, Perforated Front Leather seating surfaces
Trailer Camera Provisions and trailer viewing software
Pickup bed includes bed assist step
Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
Steering wheel, wrapped
Front and Rear Park Assist, ultrasonic
Tailgate and bed rail protection caps, top
Steering column, manual Tilt-Wheel and telescoping
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
Defogger, rear-window electric
Skid Plates protect the oil pan, front axle and transfer case
CornerStep, rear bumper
Wheels, 20" (50.8 cm) High Gloss black aluminum wheels, 8 spokes (STD)
Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])
Air vents, rear
Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
Glass, deep-tinted
Steering wheel, heated
Door handles, body-color
Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
Adaptive Cruise Control
Wipers, front rain-sensing
Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
Daytime Running Lamps LED signature lighting
SiriusXM
Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
Tire, spare LT275/70R18 all-terrain, blackwall
Remote vehicle starter system
Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)
Seat Belt Adjustable Guide Loops, front row only
LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
Seats, ventilated driver and front passenger
Moldings, beltline, Black
Bed View Camera camera in the CHMSL to show a view of the cargo bed, display located in infotainment screen, includes Two Trailer Camera Provisions
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
LED Signature DRL's
X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
HD Surround Vision provides the driver with an overhead view of the scene around the vehicle on a center stack display. Includes front camera washer.
Audio System, 13.4" diagonal Premium GMC Infotainment System with Google built in apps such as navigation and voice assistance, includes color touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones. (STD)
Window, power front, passenger express up/down
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
Single Rear Wheels
OnStar Basics (OnStar Fleet Basics for Fleet) Drive confidently with core OnStar services including remote commands, built-in voice assistance, real-time traffic and navigation, and Automatic Crash Response to help if you're in need. (Requires (UE1) OnStar. OnStar Basics includes remote commands, Navigation, Voice Assistance, and Automatic Crash Response, for eligible vehicles with compatible software. OnStar Basics is standard for 8 years; OnStar plan, working electrical system, cell reception and GPS signal required. OnStar links to emergency services. Service coverage varies with conditions and location. Service availability, features and functionality vary by device and software version. See onstar.com for details and limitations.)
Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted
Four wheel drive
StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist
Bumper, rear body-color with bumper CornerSteps
Seats, heated second row outboard seats
Hill Descent Control
Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
Seating, heated driver and front outboard passenger
Tailgate, GMC MultiPro Tailgate with six functional load/access features. NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details
Trailer brake controller, integrated
Sierra HD Pro Safety includes (UEU) Forward Collision Alert, (UE4) Following Distance Indicator, (UKJ) Front Pedestrian Braking, (TQ5) IntelliBeam, (UFL) Lane Departure Warning, (T8Z) Buckle to Drive and (UHY) Automatic Emergency Braking
Rear axle, 3.42 ratio
AT4 Premium Plus Package
Option/package discount
Exhaust Brake
Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington state requirements
Sunroof, power
Summit White
License plate kit, front
Jet Black with Kalahari accents, Perforated Front Leather seating surfaces
Lamps, Smoked Amber roof marker, (LED)
Transmission, 10-speed automatic
Window, power, rear sliding
Battery, heavy-duty 730 cold-cranking amps/70 Amp-hr
Assist steps, power-retractable, Black
Alternator, 220 amps
Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel compatible
Gooseneck / 5th Wheel Prep Package
Engine block heater
Multicolor 15" Diagonal Head-Up Display
High idle switch
GVWR, 12,250 lbs. (5557 kg) with single rear wheels
Universal Home Remote
AT4 Preferred Package
Rear Camera Mirror
Winter Grille Cover
AT4 Preferred Equipment Group
Capped Fuel Fill
Technology Package
Snow Plow Prep/Camper Package
AT4 PREMIUM PLUS PACKAGE DISCOUNT
CUSTOMER DIALOGUE NETWORK
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