The 2026 GMC Sierra 2500HD AT4 Is Ready For Maine Winters
2026 GMC Sierra 2500HD AT4
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About This Vehicle
If you’re looking for a truck that doesn't blink when the snow starts piling up in the driveway or the mud season hits backroads, the 2026 GMC Sierra 2500HD AT4 is exactly what you need. With its Duramax 6.6L Turbo-Diesel V8 delivering a massive 975 lb-ft of torque, this beast pulls like a dream, whether you're hauling a trailer or clearing a path with a plow. It’s built tough in Flint, but it feels right at home here in the Pine Tree State.
Inside, you’ve got a cabin that’s as comfortable as it is capable. You’ll stay cozy through the coldest February mornings with heated and cooled leather seats and a heated steering wheel, while the advanced Technology Package—including a head-up display and rear camera mirror—gives you total confidence on the road.
Key highlights include: - Snow Plow Prep Package with heavy-duty alternator - Gooseneck/5th Wheel Prep for serious towing - Off-road high clearance steps for easy access - All-weather floor liners to keep the mud where it belongs - Power sunroof for those crisp Maine summer nights
Vehicle Details
Body Style
Truck
Drivetrain
4X4
Engine
Turbocharged Diesel V8 6.6L/
Transmission
AUTOMATIC
Fuel
Diesel
Exterior
Onyx Black
Key Features
Standard Equipment
Safety
- • Forward Collision Alert
- • Following Distance Indicator
- • Front Pedestrian Braking
- • IntelliBeam
- • Lane Departure Warning
- • Buckle to Drive
- • Automatic Emergency Braking
- • Teen Driver Mode
- • Safety Alert Seat
- • Rear Cross Traffic Alert
- • HD Surround Vision
- • Front & Rear Park Assist
- • Trailer Side Blind Zone Alert
Powertrain
- • Auto locking rear diff
- • 2 Spd Autotrac Transfer Case
- • Traction Select System w/ Off-Road & Tow-Haul Mode
- • Heavy-duty air cleaner
- • Skid plates
- • Stabilitrak w/ Trailer Sway Control & Hill Start Assist
- • Dig. Variable Steering Assist
- • All-terrain tires
- • Trailering package
- • Trailer brake controller
- • Vehicle trailering app
Technology
- • Premium GMC Infotainment System 13.4" diag color touchscreen w/Google built-in compatibility
- • Bluetooth for most phones
- • Wireless Apple CarPlay & Wireless Android Auto
- • 8 years OnStar basics
- • SiriusXM audio with SXM trial subscription
- • Bose premium sound system
- • Color driver info center 12.3"
- • Open and start remote keyless
- • Rear seat reminder
Interior
- • Dual zone climate control
- • 10 way pwr front bucket seats
- • Heated frt & rear outer seats
- • Ventilated front seats
- • 60/40 rear folding bench seat with storage package
- • Driver seat & mirror memory
- • Wrapped & heated steering wheel
Exterior
- • Cornerstep rear bumper
- • Power fold/extend & heated trailer mirrors w/auto-dim
- • LED fog lamps
- • LED cargo area lighting
- • Red front recovery hooks
- • Rear-window defogger
- • Rear wheelhouse liners
- • GMC MultiPro tailgate
- • Spray-on bedliner
- • Headlamps, animated LED projectors
Comfort & Convenience
- • 120V power outlet in cargo bed & instrument panel
Optional Equipment & Packages
Duramax 6.6L Turbo-Diesel
$9,990AT4 Premium Plus
$4,035Preferred Package
- • Universal Home Remote
- • Power sliding rear window
- • LED roof marker lamps
Power Sunroof
Technology Package
- • Rear camera mirror
- • Multi-color head up display
AT4 High Clearance Step
Gooseneck/5th Wheel Package
$545- • Stamped bed holes w/caps
- • 7-pin trailer harness
Onyx Black
$495All-Weather Floor Liners
$295Molded Splash Guards, Black
$275Snow Plow Prep/Camper Package
$150- • 220-Amp alternator
- • Increased front GAWR
- • Skid plates
- • Roof emergency light provisions w/pass through
Rear Axle 3.42 Ratio
GVWR, 11,350 LBS. (5148 KG)
Add a Boss Plow to Your Truck
Pair your 2026 GMC Sierra 2500HD AT4 with a Boss snow plow — installed and ready to work.
Upfit this GMC Sierra 2500HD
This chassis is ready for a work-truck body. These upfit partners build bodies that fit it — pick one and our fleet team will spec and price the package.
DuraMag · Service Bodies
Aluminum Service BodyFully welded all-aluminum service body — extruded box-tube construction, no bolts to rattle loose.
DuraMag · Service Bodies
Canopy Service BodyFull-width enclosed aluminum canopy service body with a stepped top and composite barn doors.
DuraMag · Landscape Bodies
Smooth-Sided Landscape BodyAll-aluminum smooth-sided landscape body with welded box-tube frame and barn-door access.
DuraMag · Service Bodies
XP Service BodyGalvanneal steel service body with flip-top lids, 5-point security, and a 250,000-mile durability rating.
Knapheide · Service Bodies
Aluminum Service BodyMilitary-grade aluminum that drops weight for more payload — backed 10 years against rust-through.
Knapheide · Service Bodies
Steel Service BodyTwo-sided galvanneal steel, lockable compartments, and a 6-year no-rust-through warranty.
Reading · Service Bodies
Classic II Aluminum Service BodyLightweight aluminum service body for more payload and built-in corrosion resistance.
Reading · Service Bodies
Classic II Steel Service BodyPremium A40 galvannealed steel service body built for heavy-duty work and corrosion resistance.
Reading · Service Bodies
SL Service BodyValue-focused steel service body with double-panel doors and optional Spacemaker storage lids.
Also listed at Quirk GMC of Rockland
This is the same vehicle (stock RG10942) on the franchise store's website, where you'll find manufacturer offers and financing tools for this brand.
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