Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
White
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock
303664
Fuel Type
Diesel
Trim Details
4WD Crew Cab Long Box SLT
Description
The 2026 GMC Sierra 3500HD SLT blends heavy-duty capability, advanced trailering technology, and premium comfort into one commanding pickup. Built to tackle demanding workloads while keeping drivers comfortable and connected, this Crew Cab Long Box delivers confident diesel power, bold styling, and professional-grade strength for work or recreation alike.Â
Performance & CapabilityÂ
Duramax® 6.6L V8 Turbo-Diesel delivering exceptional torque and heavy-duty towing confidenceÂ
Allison® 10-Speed Automatic Transmission engineered for smooth shifting and optimized hauling performanceÂ
4-Wheel Drive System with Autotrac® Two-Speed Transfer Case for dependable traction in changing conditionsÂ
Heavy-Duty Suspension Package designed for stability, payload strength, and towing controlÂ
3.42 Rear Axle Ratio balancing pulling power with highway efficiencyÂ
Integrated Trailer Brake Controller with Hitch View and Trailering App for enhanced towing visibility and confidenceÂ
Gooseneck / 5th Wheel Prep Package ready for serious trailering capabilityÂ
Engine Exhaust Brake and High Idle Switch for improved control during demanding towing situationsÂ
Automatic Locking Rear Differential and Skid Plates for added durability on rough terrainÂ
Heavy-Duty Cooling Components including transmission oil cooler, engine oil cooler, and 220-amp alternatorÂ
Winter & Weather ComfortÂ
Heated Front Seats and Heated Steering Wheel for cold-weather comfortÂ
Remote Start System allowing the cabin to warm up before you step insideÂ
Dual-Zone Automatic Climate Control for personalized driver and passenger comfortÂ
Engine Block Heater and Winter Grille Cover for dependable cold-climate performanceÂ
Rain-Sensing Windshield Wipers and Rear Window Defogger for added visibility in harsh weatherÂ
Deep Tinted Glass helping reduce glare and maintain cabin comfort year-roundÂ
Interior Comfort & ConvenienceÂ
Spacious Crew Cab configuration with Front 40/20/40 Split Bench Seating for versatility and comfortÂ
Power Driver and Front Passenger Seats with memory settings for personalized convenienceÂ
Jet Black Interior with premium trim accents for a refined, upscale atmosphereÂ
Rear Seat Storage Package adding practical cargo flexibility inside the cabinÂ
Push-Button Start and Keyless Open for effortless daily operationÂ
Power Windows and Power Door Locks with express functionality for convenience at every seatÂ
Wireless Phone Projection with Apple CarPlay® & Android Autoâ„¢ compatibilityÂ
Premium 13.4" GMC Infotainment Touchscreen with Google Built-In and Navigation capabilityÂ
12" Digital Driver Information Centre providing customizable driving and trailering dataÂ
Multiple USB Ports and 120V Power Outlets in both the cabin and cargo bed for worksite functionalityÂ
Wi-Fi Hotspot Capability helping keep passengers connected on the goÂ
Safety & Driver AssistanceÂ
Sierra HD Pro Safety Package enhancing confidence behind the wheelÂ
Forward Collision Alert with Automatic Emergency Braking for added peace of mindÂ
Lane Departure Warning and Following Distance Indicator assisting with safer highway drivingÂ
Front Pedestrian Braking helping detect and react to hazards aheadÂ
HD Rear Vision Camera and Hitch View improving visibility when reversing or towingÂ
Teen Driver Technology and Buckle-to-Drive promoting responsible driving habitsÂ
Tire Pressure Monitoring System and Brake Wear Indicator helping monitor vehicle conditionÂ
Trailering Mirrors with power adjustment, heating, and auto-dimming functionality for towing convenienceÂ
Exterior Styling & UtilityÂ
Exterior Colour: Summit White — clean, bold, and professional with timeless appealÂ
18" Polished Forged Aluminum Wheels paired with all-terrain tires for a rugged yet refined lookÂ
Chrome Front and Rear Bumpers, Chrome Door Handles, and Chrome Mirror Caps adding upscale stylingÂ
LED Headlamps, LED Fog Lamps, Roof Marker Lamps, and LED Cargo Bed Lighting for enhanced visibilityÂ
Spray-On Bedliner protecting the cargo box from daily wear and tearÂ
EZ Lift Power Lock & Release Tailgate for easier loading and unloadingÂ
Bed-Mounted 120V Power Outlet providing added functionality at the jobsite or campsiteÂ
Rear CornerSteps and Black Recovery Hooks enhancing practicality and utilityÂ
Long Box configuration offering expanded cargo capacity for tools, equipment, or recreational gearÂ
Whether you’re towing heavy equipment, hauling across the jobsite, or heading out for a weekend adventure, the 2026 GMC Sierra 3500HD SLT delivers relentless diesel capability, advanced technology, and premium comfort in one exceptionally capable heavy-duty truck. It’s built for drivers who demand strength without sacrificing refinement.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
-
Body StyleCrew Cab Pickup
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Body CodeE63
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DrivetrainFour Wheel Drive
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Trans Order CodeMGM
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Trans Type10
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Trans Description Cont.Automatic
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First Gear Ratio (:1)4.54
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Second Gear Ratio (:1)2.87
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Third Gear Ratio (:1)2.06
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Fourth Gear Ratio (:1)1.72
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Fifth Gear Ratio (:1)1.48
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Sixth Gear Ratio (:1)1.26
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Seventh Gear Ratio (:1)1.00
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Eighth Gear Ratio (:1)0.85
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Ninth Gear Ratio (:1)0.69
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Tenth Gear Ratio (:1)0.63
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Reverse Ratio (:1)4.54
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Passenger Capacity6
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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)5600
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Gross Axle Wt Rating - Rear (lbs)10400
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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)14000
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Gross Combined Wt Rating (lbs)40000
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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)20000
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Wt Distributing Hitch - Max Tongue Wt. (lbs)2000
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Fifth Wheel Hitch - Max Trailer Wt. (lbs)31000
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Fifth Wheel Hitch - Max Tongue Wt. (lbs)7860
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Maximum Trailering Capacity (lbs)20000
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Engine Order CodeL5P
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Engine TypeTurbocharged Diesel V8
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Displacement6.6L
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Fuel SystemDirect Injection
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SAE Net Horsepower @ RPM470 @ 2800
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SAE Net Torque @ RPM975 @ 1600
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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)220
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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) - Front3.42
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Axle Ratio (:1) - Rear3.42
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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 x 1.6
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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)96.6
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Height, Overall (in)80.04
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Cab to Axle (in)55.24
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Ground Clearance, Front (in)10.39
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Ground Clearance, Rear (in)10.39
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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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