Features
Exterior
Coastal Dune
Interior
Jet Black with Kalahari accents
Drivetrain
Four Wheel Drive
Engine
6.6L 8 Cylinders
Fuel
Diesel
Horsepower
470 hp @ 2800 rpm
Torque
975 lb-ft @ 1600 rpm
Transmission
Automatic
Truck Bed Length
6.85 ft at the floor level
Truck Bed Width
5.95 ft at the floor level
Included Packages & Options
Option
Original
MSRP ($)
AT4 PREMIUM PLUS PACKAGE
Includes (PDO) AT4 Preferred Package
(CF5) Power Sunroof
(CWM) Technology Package And (VXW) AT4 High Clearance Step
LPO
(CF5) Power Sunroof
(CWM) Technology Package And (VXW) AT4 High Clearance Step
LPO
$5,035
COASTAL DUNE
$495
ENGINE, DURAMAX 6.6L TURBO-DIESEL V8, B20-DIESEL COMPATIBLE
(470 Hp [350.5 Kw] @ 2800 Rpm
975 Lb-Ft Of Torque [1322 Nm] @ 1600 Rpm)
975 Lb-Ft Of Torque [1322 Nm] @ 1600 Rpm)
$9,990
GOOSENECK / 5TH WHEEL PREP PACKAGE -- HITCH PLATFORM TO ACCEPT GOOSENECK OR 5TH WHEEL HITCH.
Includes Hitch Platform With Tray To Accept Ball
Stamped Bed Holes With Removable Caps Installed And Bed Mounted 7-Pin Trailer Harness (Similar To UY2 Harness)
Stamped Bed Holes With Removable Caps Installed And Bed Mounted 7-Pin Trailer Harness (Similar To UY2 Harness)
$545
LPO, OFF-ROAD HIGH CLEARANCE STEPS
(Dealer-Installed)
$1,295
SUNROOF, POWER
$995
TECHNOLOGY PACKAGE
Includes (DRZ) Rear Camera Mirror And (UV6) Multicolor 15" Diagonal Head-Up Display
$1,340
Additional Options
$1,005
Total Added Value
$20,700Description
Command the trail and the jobsite in the head-turning 2026 GMC Sierra 2500HD 4WD Crew Cab 159" AT4. Finished in a distinctive Coastal Dune exterior color, this heavy-duty pickup seamlessly merges premium styling with rugged off-road capability. Designed for drivers who demand uncompromising power alongside sophisticated design, the AT4 trim delivers a commanding posture engineered to tackle tough terrain while turning heads wherever your journeys take you.
Under the hood, this heavy-duty truck is powered by the legendary Duramax 6.6L Turbo-Diesel V8 engine, compatible with B20-diesel, delivering impressive torque and dependable towing muscle. Paired with a robust Four-Wheel Drive system, the 2026 GMC Sierra 2500HD AT4 handles heavy payloads, trailer hauling, and challenging off-road trails with total confidence. Functional utility is further elevated by LPO off-road high clearance steps, giving you effortless access to the cabin without compromising critical ground clearance over rough obstacles.
Inside, the spacious Crew Cab offers a premium atmosphere highlighted by a Jet Black interior with eye-catching Kalahari accents. A power sunroof fills the cabin with natural light, while the fully equipped AT4 Premium Plus Package and Technology Package provide advanced driver awareness, modern connectivity, and refined convenience. Combining raw diesel performance, cutting-edge technology, and high-end interior comfort, the 2026 GMC Sierra 2500HD 4WD Crew Cab AT4 stands as the ultimate heavy-duty truck for work, play, and every road in between.
Under the hood, this heavy-duty truck is powered by the legendary Duramax 6.6L Turbo-Diesel V8 engine, compatible with B20-diesel, delivering impressive torque and dependable towing muscle. Paired with a robust Four-Wheel Drive system, the 2026 GMC Sierra 2500HD AT4 handles heavy payloads, trailer hauling, and challenging off-road trails with total confidence. Functional utility is further elevated by LPO off-road high clearance steps, giving you effortless access to the cabin without compromising critical ground clearance over rough obstacles.
Inside, the spacious Crew Cab offers a premium atmosphere highlighted by a Jet Black interior with eye-catching Kalahari accents. A power sunroof fills the cabin with natural light, while the fully equipped AT4 Premium Plus Package and Technology Package provide advanced driver awareness, modern connectivity, and refined convenience. Combining raw diesel performance, cutting-edge technology, and high-end interior comfort, the 2026 GMC Sierra 2500HD 4WD Crew Cab AT4 stands as the ultimate heavy-duty truck for work, play, and every road in between.
Disclaimer
All Payments exclude government fees and taxes, any finance charges, any dealer document preparation charge, and any emission testing charge. The price for listed vehicles as equipped does not include charges such as: License, Title, Registration Fees, State or Local Taxes, Smog Fees, Credit Investigation, Optional Credit Insurance, Physical Damage of Liability Insurance, or Delivery Fees.
Specifications
Bed Step, Black integrated on forward portion of bed on driver and passenger side
Bumper, front, body-color lower
Bumper, rear body-color with bumper CornerSteps
Cargo tie downs (12), fixed, rated at 500 lbs per corner
CornerStep, rear bumper
Door handles, body-color
Fog lamps, LED
Glass, deep-tinted
Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob
Mirror caps, high gloss Black
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
Moldings, beltline, Black
Running Boards : Running Boards/Side Steps
Tailgate and bed rail protection caps, top
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
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
Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
Tire - Front : Tires - Front On/Off Road
Tire - Rear : Tires - Rear On/Off Road
Tire - Spare : Conventional Spare Tire
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
Tire, spare LT275/70R18 all-terrain, blackwall
Tires : Tire Pressure Monitor
Wheelhouse liners, rear
Wheels : Aluminum Wheels
Wipers, front rain-sensing
Pickup Box
Bed Liner
Integrated Tailgate Step
Roof
Generic Sun/Moonroof
Sun/Moonroof
Mirrors
Auto-Dimming Rearview Mirror
Heated Mirrors
Mirror Memory
Power Folding Mirrors
Power Mirror(s)
Disclaimer
All advertised prices exclude government fees and taxes, any finance charges, any dealer document preparation charge, and any emission testing charge. While we try to make sure that all prices posted here are accurate at all times, we cannot be responsible for typographical and other errors that may appear on the site. We make every effort to provide you the most accurate, up-to-the-minute information; however, it is your responsibility to verify with the Dealer that all details listed are accurate. The dealership is not responsible for typographical, pricing, product information, advertising or shipping errors. Advertised prices and available quantities are subject to change without notice. All rates and offers are dependent on bank approval, which varies based on applicant's credit as well as the vehicle.
