Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
Black
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock
303448
Fuel Type
Gasoline
Trim Details
4WD Crew Cab Long Box SLT
Description
The 2026 GMC Sierra 3500HD SLT 4WD Crew Cab Long Box is engineered for those who demand uncompromising strength, advanced capability, and premium comfort in a heavy-duty truck. With its commanding presence, refined interior, and professional-grade performance, this Sierra HD is built to handle the toughest jobs while keeping you comfortable on every drive.Â
Performance & CapabilityÂ
Engine: 6.6L V8 Direct Injection engine delivering robust power and long-lasting durabilityÂ
Transmission: Heavy-duty 10-speed automatic for smooth, controlled shifting under loadÂ
Drivetrain: Autotrac 4-Wheel Drive (4WD) system for superior traction in all terrains and conditionsÂ
Suspension: Heavy-duty suspension package engineered for stability, payload, and towing confidenceÂ
Axle Ratio: 3.73 rear axle ratio for optimized pulling power and efficiencyÂ
Trailering Equipment: Integrated trailer brake controller, hitch guidance with Hitch View, and in-vehicle trailering appÂ
Differential: Automatic locking rear differential for enhanced traction on uneven or slippery surfacesÂ
Steering: Digital Variable Steering Assist for precise control whether towing or cruisingÂ
Work-Ready StrengthÂ
High-strength steel frame and reinforced components built for heavy-duty demandsÂ
Long Box configuration providing maximum cargo capacity for tools, equipment, or materialsÂ
Trailering Mirrors: Heated, power-adjustable, and auto-dimming for improved visibility when haulingÂ
Bed Utility: 120V bed-mounted power outlet and LED cargo lighting for jobsite functionalityÂ
Tailgate: EZ Lift power lock and release tailgate for convenient access and secure operationÂ
Recovery Hooks and CornerSteps for practical functionality in demanding environmentsÂ
Interior Comfort & ConvenienceÂ
Front Bucket Seats with power adjust for driver and passenger comfortÂ
Heated & Ventilated Front Seats for year-round comfort in any climateÂ
Heated Steering Wheel for cold-weather driving easeÂ
Dual-Zone Automatic Climate Control for personalized cabin comfortÂ
Remote Start System to pre-condition the interiorÂ
Keyless Open & Push-Button Start for effortless entry and ignitionÂ
Rear Seat Storage Package for added practicality and organizationÂ
Technology & ConnectivityÂ
13.4" GMC Premium Infotainment Touchscreen with Google Built-In and intuitive controlsÂ
12" Digital Driver Information Centre with customizable multi-color displayÂ
Wireless Apple CarPlay® & Android Autoâ„¢ for seamless smartphone integrationÂ
Bose® Premium Audio System delivering rich, immersive soundÂ
Wireless Charging Pad and multiple USB ports for device convenienceÂ
Wi-Fi® Hotspot capability to stay connected wherever the job takes youÂ
Steering Wheel Audio Controls for easy access to media and settingsÂ
Safety & Driver AssistanceÂ
GMC Pro Safety suite designed to enhance driver awareness and confidenceÂ
Forward Collision Alert with Automatic Emergency BrakingÂ
Lane Departure Warning to help keep you on trackÂ
Front Pedestrian Braking for added safety in urban environmentsÂ
Following Distance Indicator for safer highway drivingÂ
HD Rear Vision Camera for improved visibility when reversing or hitchingÂ
Teen Driver Mode and Buckle-to-Drive for added safety awarenessÂ
Exterior Styling & UtilityÂ
Bold SLT styling with chrome front and rear bumpers and chrome mirror capsÂ
18" Machined Aluminum Wheels with dark grey accents for a rugged, refined lookÂ
LED Headlamps, Fog Lamps, and IntelliBeam® automatic high beams for enhanced visibilityÂ
LED Roof Marker Lamps emphasizing its heavy-duty capabilityÂ
Deep-Tinted Glass for privacy and a sleek appearanceÂ
Exterior Colour: Onyx Black — timeless, bold, and commandingÂ
Whether you’re towing heavy loads, managing a demanding worksite, or heading out on long-distance drives, the 2026 GMC Sierra 3500HD SLT delivers exceptional strength, advanced technology, and refined comfort. It’s a heavy-duty truck built to exceed expectations — combining capability, durability, and premium refinement in every detail.Â
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Packages & Options
Standard Equipment
Technical Specifications
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AM/FM Stereo
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Auxiliary Audio Input
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Bluetooth Connection
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MP3 Player
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Navigation System
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Smart Device Integration
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Requires Subscription
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Satellite Radio
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Audio system feature, 6-speaker system
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WiFi Hotspot
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Aluminum Wheels
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Tires - Front All-Terrain
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Tires - Rear All-Terrain
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Conventional Spare Tire
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Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
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Bumper, front chrome lower
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CornerStep, rear bumper
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Mouldings, beltline, stainless steel
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Cargo tie downs (12), fixed, rated at 500 lbs per corner
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Grille, Chrome surround with Chrome insert bars
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Daytime Running Lights
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LED Headlights
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Automatic Highbeams
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Fog Lamps
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Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
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Heated Mirrors
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Integrated Turn Signal Mirrors
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Power Folding Mirrors
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Power Mirror(s)
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Mirror caps, chrome
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Intermittent Wipers
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Rain Sensing Wipers
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Variable Speed Intermittent Wipers
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Privacy Glass
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Tailgate, standard
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Tailgate and bed rail protection caps, top
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Split Bench Seat
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Leather Seats
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Driver Adjustable Lumbar
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Power Driver Seat
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Passenger Adjustable Lumbar
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Power Passenger Seat
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Pass-Through Rear Seat
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Rear Bench Seat
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Heated Front Seat(s)
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Mirror Memory
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Seat Memory
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Floor covering, colour-keyed carpeting
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Floor Mats
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Heated Steering Wheel
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Adjustable Steering Wheel
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Steering Wheel Audio Controls
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Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
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Exterior Temperature Display located in radio display
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Compass, located in instrument cluster
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Tire Pressure Monitor
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Window, power front, drivers express up/down
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Power Windows
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Power Door Locks
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Remote Engine Start
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Keyless Entry
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Keyless Start
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Cruise Control
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Security System
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Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
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Auxiliary Audio Input
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MP3 Player
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USB ports, (2) charge-only, rear
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A/C
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Climate Control
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Multi-Zone A/C
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Air vents, rear
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Rear Defrost
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Auto-Dimming Rearview Mirror
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Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted
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8 Cylinder Engine
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Gasoline Fuel
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10-Speed A/T
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A/T
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Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
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Running Boards/Side Steps
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GVWR, 11,700 lbs. (5307 kg) with single rear wheels (Included and only available with model TK30943 model and (L8T) 6.6L V8 gas engine. Requires single rear wheels.)
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Keyless Start
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Air filter, heavy-duty
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Air filtration monitoring
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Transfer case, two-speed active electronic Autotrac with push button control
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Locking/Limited Slip Differential
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Four Wheel Drive
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Cooling, external engine oil cooler
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Cooling, auxiliary external transmission oil cooler
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Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
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Trailer brake controller, integrated
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Tow Hooks
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Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
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Power Steering
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4-Wheel Disc Brakes
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ABS
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Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
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Automatic Highbeams
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Front Collision Mitigation
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Front Collision Warning
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Lane Departure Warning
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Tow Hitch
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ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
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Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
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Front Collision Mitigation
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Front Collision Warning
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Stability Control
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Traction Control
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Daytime Running Lights
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Driver Air Bag
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Front Head Air Bag
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Front Side Air Bag
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Passenger Air Bag
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Passenger Air Bag Sensor
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Rear Head Air Bag
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Requires Subscription
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Telematics
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Back-Up Camera
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Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
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Lane Departure Warning
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Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
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Rear Seat Reminder
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Driver Restriction Features
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Rear Seat Belt Indicator (Requires Crew Cab or Double Cab model.)
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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)
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Tire Pressure Monitor
No matches were found.
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Vehicle NameGMC Sierra 3500HD
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Body StyleCrew Cab Pickup
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Body CodeE63
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DrivetrainFour Wheel Drive
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Trans Order CodeMKM
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Trans Type10
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Trans Description Cont.Automatic
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First Gear Ratio (:1)
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Second Gear Ratio (:1)
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Third Gear Ratio (:1)
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Fourth Gear Ratio (:1)
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Fifth Gear Ratio (:1)
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Sixth Gear Ratio (:1)
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Seventh Gear Ratio (:1)
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Eighth Gear Ratio (:1)
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Ninth Gear Ratio (:1)
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Tenth Gear Ratio (:1)
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Reverse Ratio (:1)
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Passenger Capacity5
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Front Head Room (in)39.88
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Front Leg Room (in)44.53
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Front Shoulder Room (in)66.02
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Front Hip Room (in)61.18
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Second Head Room (in)40.12
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Second Leg Room (in)43.4
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Second Shoulder Room (in)65.3
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Second Hip Room (in)60.24
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Gross Axle Wt Rating - Front (lbs)5200
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Gross Axle Wt Rating - Rear (lbs)7250
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Curb Weight - Front (lbs)4142
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Curb Weight - Rear (lbs)2918
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Gross Vehicle Weight Rating Cap (lbs)11700
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Gross Combined Wt Rating (lbs)26000
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Dead Weight Hitch - Max Trailer Wt. (lbs)5000
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Dead Weight Hitch - Max Tongue Wt. (lbs)500
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Wt Distributing Hitch - Max Trailer Wt. (lbs)16000
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Wt Distributing Hitch - Max Tongue Wt. (lbs)1600
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Fifth Wheel Hitch - Max Trailer Wt. (lbs)18230
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Fifth Wheel Hitch - Max Tongue Wt. (lbs)4557
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Maximum Trailering Capacity (lbs)20000
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Engine Order CodeL8T
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Engine TypeGas V8
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Displacement6.6L
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Fuel SystemDirect Injection
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SAE Net Horsepower @ RPM401 @ 5200
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SAE Net Torque @ RPM464 @ 4000
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Engine Oil CoolerYes
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Cold Cranking Amps @ 0° F (Primary)720
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Maximum Alternator Capacity (amps)170
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Frame TypeHydroformed
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Suspension Type - FrontShort/Long Arm w/Torsion Bars
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Suspension Type - Rear3-Stage Multi-Leaf
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Axle Type - FrontIndependent
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Axle Ratio (:1) - Front3.73
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Axle Ratio (:1) - Rear3.73
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Shock Absorber Diameter - Front (mm)51
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Shock Absorber Diameter - Rear (mm)51
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Stabilizer Bar Diameter - Front (in)1.38
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Front Tire Order CodeQF6
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Rear Tire Order CodeQF6
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Spare Tire Order CodeZYG
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Front Tire SizeLT275/70R18
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Rear Tire SizeLT275/70R18
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Spare Tire SizeLT275/70R18
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Front Wheel Size (in)18 x 8
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Rear Wheel Size (in)18 x 8
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Spare Wheel Size (in)18 x 8
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Front Wheel MaterialAluminum
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Rear Wheel MaterialAluminum
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Spare Wheel MaterialSteel
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Steering TypePwr Recirculating Ball
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Steering Ratio (:1), At LockN/A
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Turning Diameter - Curb to Curb (ft)57.0
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Turning Diameter - Wall to Wall (ft)N/A
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Brake TypePwr
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Brake ABS System4-Wheel
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Disc - FrontYes
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Disc - RearYes
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Front Brake Rotor Diam x Thickness (in)14 x 1.6
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Rear Brake Rotor Diam x Thickness (in)14.1 x 1.3
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Fuel Tank Capacity, Approx (L)136
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Wheelbase (in)172
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Length, Overall (in)266.77
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Width, Max w/o mirrors (in)81.85
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Height, Overall (in)80.67
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Cab to Axle (in)55.24
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Ground Clearance, Front (in)11.14
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Ground Clearance, Rear (in)11.14
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Cargo Box Length @ Floor (in)98.22
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Cargo Box Width @ Floor (in)71.4
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Cargo Box Width @ Wheelhousings (in)50.55
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Cargo Box (Area) Height (in)21
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Cargo Volume (ft³)83.5
No matches were found.
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