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New 2026 GMC Sierra 2500 AT4X Crew Cab

Stock #6GM25039

Window Sticker

Vehicle Notes

This GMC Sierra 2500HD delivers a Turbocharged Diesel V8 6.6L/ engine powering this Automatic transmission. WINTER GRILLE COVER, WHEELS, 18" (45.7 CM…
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Chassis Details

Stock Number

6GM25039

Stock Type

New

Year

2026

Make

GMC

Model

Sierra 2500

Class

GVWR

11,350

Drivetrain

4WD

Cab Type

Crew

Vehicle Trim

AT4X

Interior Color

Obsidian Rush, Full Grain Leather seat trim

Seating Capacity

Exterior Color Description

Coastal Dune

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

Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
Glass, deep-tinted
Steering wheel, heated
Assist steps, power retractable, Black includes LED lighting (Not available with any other assist steps.)
Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
Floor covering, color-keyed carpeting
Bed Step, Black integrated on forward portion of bed on driver and passenger side
Sunroof, power
SiriusXM Trial Subscription
Wireless phone projection for Apple CarPlay and Android Auto
Air vents, rear
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.)
CornerStep, rear bumper (Not available with (ULV) AT4X AEV Edition.)
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.)
Differential, driver-selectable full-locking rear, e-locking
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
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
Steering wheel, leather-wrapped
Rear Seat Reminder
Seats, ventilated driver and front passenger
Moldings, beltline, Black
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
Window, power, rear sliding with rear defogger
LED Signature DRL's
Lamps, Smoked Amber roof marker, (LED) (Not available with (YF5) California state emissions requirements.)
Rear Camera Mirror inside rearview auto-dimming with full camera display
Bose Premium Series with 12-speaker system with CenterPoint Richbass woofer and AudioPilot
Driver memory recalls driver "presets" for power driver seat and outside mirrors
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.
Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
Window, power front, passenger express up/down
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
Multicolor 15" Diagonal Head-Up Display
Air filter, heavy-duty
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
StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
Hill Descent Control
Bumper, front, body-color lower (Bumper color will be High Gloss Black.)
Cooling, external engine oil cooler
Theft-deterrent system, unauthorized entry
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)
Rear Cross Traffic Alert
Seat trim, Full Grain Leather
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.)
OnStar Basics (OnStar Fleet Basics for Fleet) Drive confidently with core OnStar services including select 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 select 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.)
Daytime Running Lamps, LED signature lighting
Recovery hooks, Red (Deleted with (ULV) AT4X AEV Edition.)
Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger), lower convex mirrors, turn signal indicators, puddle lamps, (U12) perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) lighting
Brake lining wear indicator
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
Headlamps, Animated LED projectors LED turn signals and Daytime Running Lamps
Door locks, power
Premium Floor Liners with removable carpet insert, front
Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)
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.)
Tire, spare, LT305/70R18-126/123R, 35" M/T
Seat adjuster, passenger 16-way power including lumbar and massage
Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display
Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
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
Bumper, rear body-color with bumper CornerSteps (Bumper color will be High Gloss Black.)
Seats, front bucket with center console (STD)
Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
LPO, MultiPro Tailgate Audio System by Kicker
Skid Plates, front aluminum
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.)
Tires, LT305/70R18-126/123R, 35" M/T
Hitch Guidance with Hitch View with image adjustment, Pan/Zoom/Tilt
Push Button Start
Steering wheel audio controls
Seat adjuster, driver 16-way power including lumbar and massage
Windows, power front, drivers express up/down
Air conditioning, dual-zone automatic climate control
Wireless Charging
Bluetooth for phone connectivity to vehicle infotainment system
Cargo tie downs (12), fixed, rated at 500 lbs per corner
Compass, located in instrument cluster
GMC Premium information Display- 13.4" diagonal Multicolor touch screen
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
Universal Home Remote
Grille (Gloss Black header and grille insert bars with Dark Nickel inserts.)
Skid Plates, Transfer case, steel
Wheelhouse liners, rear
Cooling, auxiliary external transmission oil cooler
Air filtration monitoring
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
Door handles, body-color (With (ULV) AT4X AEV Edition door handles will be Gloss black.)
Seat, Up-level Rear with Storage Package 60/40 folding bench, includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
Windows, power rear, express down
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)
Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
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
Steering, Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
Defogger, rear-window electric
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
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.)
Exterior Temperature Display, located in radio display
OnStar Services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.)
Rear Seat Belt Indicator
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
Fog lamps, LED
Suspension, Off-Road Includes, 1.5" suspension lift: front suspension lift composed of: Control Arms, Ball Joints, Knuckles, DSSV Dampers, rear suspension lift composed of spacer block and DSSV Dampers and Half shafts w/ revised joints, 3-stage Leaf springs from 3500
Safety Alert Seat
Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
Four wheel drive
Trailer Tire Pressure Monitor Sensors includes set of 4 sensors. Sensor functionality requires (UET) In-Vehicle Trailering App to be ordered with the vehicle and installed by the factory. Sensors will be shipped loose with the truck and will need to be installed on trailer by customer. System is capable of monitoring up to 6 wheels. Additional or replacement sensors are available through GM Accessories
Seats, heated second row outboard seats
Transfer case, two-speed active, electronic Autotrac with push button control
Seating, heated driver and front outboard passenger
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
Wheels, 18" (45.7 cm) machined aluminum wheel with High Gloss black accents (STD)
Engine, Duramax 6.6L Turbo-Diesel V8, B20-Diesel compatible
Engine block heater
Emissions, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington state requirements
Exhaust brake
Winter Grille Cover
Coastal Dune
Battery, heavy-duty dual 730 cold-cranking amps/70 Amp-hr
AT4X Preferred Equipment Group
License plate kit, front, Incandescent lighting
GVWR, 11,350 lbs. (5148 kg)
Alternator, 220 amp
Transmission, 10-speed automatic
Capped Fuel Fill
Rear axle, 3.42 ratio
Obsidian Rush, Full Grain Leather seat trim
Gooseneck / 5th Wheel Prep Package -- Hitch platform to accept Gooseneck or 5th Wheel hitch.
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