2026 GMC Sierra 3500 HD AT4

Complete vehicle specifications

Vehicle description

Features & options (149)

• Basic
• Corrosion
• Maintenance
• Roadside Assistance
• Max seating capacity
• Fuel System
• Fuel tank capacity
• Horsepower
• Towing capacity
• 13.4" diagonal GMC Premium Infotainment System with Google built-in
• Bluetooth
• Bose Premium Sound System
• SiriusXM with 360L Trial Subscription
• Wi-Fi Hotspot capable
• Wireless phone projection
• 18" LT275/70R18 all-terrain, blackwall spare tire
• 20" LT275/65R20 all-terrain, blackwall tires
• 20" high gloss Black aluminum wheels
• Animated LED Signature Tail lamps with Stop, turn and Reverse lamps
• Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
• Black beltline moldings
• Body-color door handles
• Body-color front bumper
• Body-color rear bumper
• Cargo bed LED lighting
• Cargo tie-downs
• CornerStep rear bumper
• Deep-tinted glass
• GMC MultiPro Tailgate
• High gloss Black mirror caps
• IntelliBeam
• LED fog lamps
• Off-Road High Clearance Steps
• Outside power-adjustable vertical trailering mirrors with power folding/extending auto-dimming driver and passenger upper glass
• Power sliding rear window with rear defogger
• Power sunroof
• Rainsense automatic wipers
• Rear wheelhouse liners
• Side Bed Step
• Smoked Amber LED roof marker lamps
• Spare tire carrier lock
• Spray-on bedliner
• Tailgate and bed rail protection caps
• Tailgate with EZ Lift assist, power lock & release
• Winter Grille Cover
• 10-way power driver seat with power lumbar
• 10-way power front passenger seat
• 12.3" diagonal color Driver Information Center
• 120-volt box-mounted power outlet
• 120-volt power outlet
• Adaptive Cruise Control
• Assist handles
• Carpeted floor covering
• Compass
• Driver memory
• Dual-zone automatic climate control
• Front bucket seats
• Front center console
• Heated driver and front outboard passenger seats
• Heated rear outboard seats
• Heated steering wheel
• In-Vehicle Trailering App
• Inside rearview auto-dimming mirror
• Keyless Open and Start
• Manual tilt and telescoping steering column
• Outside temperature display
• Power door locks
• Power windows with driver and front passenger express-up/down
• Power windows with driver express-up/down
• Power windows with rear express-down
• Premium front floor liners with removable carpet insert
• Premium rear floor liners with removable carpet insert
• Rear air vents
• Rear window defogger
• Remote Start
• Steering-wheel mounted controls
• Theft-deterrent unauthorized entry system
• USB ports
• Universal Home Remote
• Up-level rear seat with storage package
• Ventilated driver and front passenger seats
• Wireless Charging
• Wrapped steering wheel
• 10-speed automatic transmission
• 12,100 lbs. GVWR
• 220-amp alternator
• 3.42 rear axle ratio
• 4-wheel antilock disc brakes
• 6.6L Duramax Turbo-Diesel V8 engine
• Air filtration monitoring
• Automatic locking rear differential
• Autotrac 2-speed transfer case with push button controls
• Brake pad wear indicator
• Capped fuel fill
• Diesel exhaust brake
• Digital Variable Steering Assist
• Engine block heater
• External auxiliary transmission oil cooler
• External engine oil cooler
• Fully boxed frame
• Gooseneck / 5th Wheel Prep Package
• Heavy-Duty Air Filter
• Heavy-duty 730 cold-cranking amps battery
• Integrated trailer brake controller
• Off-Road suspension
• Red vertical recovery hooks
• Skid plates
• Trailering Information Label
• LED Daytime Running Lamps
• Signature LED Daytime Running Lamps
• 6 airbags
• Bed View Camera
• Buckle to Drive
• Following Distance Indicator
• Forward Collision Alert
• Front Pedestrian Braking
• Front and Rear Park Assist
• HD Surround Vision
• Hitch Guidance
• Hitch View
• Lane Departure Warning
• OnStar Basics
• OnStar services capable
• Rear Cross Traffic Alert
• Rear Seat Belt Indicator
• Rear Seat Reminder
• Safety Alert Seat
• Seat Belt Adjustable Guide Loops
• Teen Driver
• Tire Pressure Monitoring System with Tire Fill Alert
• Trailer Side Blind Zone Alert
• Trailering camera provisions
• Automatic Emergency Braking
• Hill Descent Control
• StabiliTrak, electronic stability control system with traction control
• AT4 Preferred Package:
• Rear sliding power window
• LED roof marker lamps
• Gooseneck Hitch Package:
• Gooseneck ball
• Chain tiedown kit with case
• May require additional optional equipment
• Snow Plow Prep / Camper Package:
• Power feed to accommodate a backup and roof emergency light
• A single 220-amp alternator
• Heavy-duty front springs
• AT4 Preferred Package
• Gooseneck Hitch Package
• Snow Plow Prep / Camper Package

Dealer-provided information may change. Confirm availability, price, vehicle condition, taxes and fees with the selling dealership.