Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
White
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock
303631
Fuel Type
Diesel
Trim Details
4WD Crew Cab Standard Box SLT
Description
The 2026 GMC Sierra 3500HD SLT combines professional-grade capability, premium comfort, and advanced diesel performance into one commanding heavy-duty pickup. Designed for serious towing, hard work, and long-haul confidence, this Crew Cab 4WD delivers rugged strength while surrounding passengers with refined technology and upscale craftsmanship. Â
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Performance & Capability Â
Duramax® 6.6L V8 Turbo-Diesel delivering exceptional torque and heavy-duty pulling power Â
Allison®-inspired 10-speed automatic transmission engineered for smooth shifting and confident towing Â
Autotrac® Two-Speed 4WD Transfer Case for dependable traction in challenging road and weather conditions Â
X31 Off-Road Package featuring Rancho® tuned suspension, skid plates, and hill descent control Â
Automatic Locking Rear Differential enhancing traction on rough terrain or slippery surfaces Â
Gooseneck / 5th Wheel Prep Package ready for serious towing and hauling demandsÂ
Integrated Trailer Brake Controller with Hitch Guidance and Hitch View for easier trailer alignment Â
Heavy-Duty Cooling System with Engine Oil Cooler and Transmission Oil Cooler for demanding workloads Â
Engine Exhaust Brake improving downhill control while towing heavy loads Â
FlexRide Drive Mode System allowing optimized performance across varying conditions Â
3.42 Rear Axle Ratio balancing towing strength with highway capability Â
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Winter & Weather Comfort Â
Heated & Ventilated Front Seats for year-round driving comfort Â
Heated Steering Wheel providing added warmth on cold mornings Â
Remote Vehicle Start System to pre-condition the cabin before every drive Â
Dual-Zone Automatic Climate Control for personalized comfort settings Â
Engine Block Heater and Winter Grille Cover supporting cold-weather operation Â
Rain-Sensing Windshield Wipers for enhanced visibility during changing weather Â
Deep-Tinted Glass helping reduce glare and maintain cabin comfort Â
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Interior Comfort & Convenience Â
Front Bucket Seats with Power Driver & Passenger Adjustments for premium comfort Â
Jet Black Interior with refined detailing and durable craftsmanship Â
Wireless Charging Pad and multiple USB ports for seamless device connectivity Â
Push-Button Start with Keyless Open for convenient entry and ignition Â
13.4" GMC Premium Infotainment Touchscreen with Google Built-In compatibility Â
Wireless Apple CarPlay® & Android Autoâ„¢ integration Â
12" Digital Driver Information Centre with customizable vehicle data Â
Bose® Premium Audio System delivering rich, immersive sound quality Â
Rear Seat Storage Package adding practical interior versatility Â
Heated, Power-Adjustable Trailering Mirrors with Auto-Dimming functionality Â
120V Power Outlets in both the cabin and truck bed for added utility on the jobsite or campsite Â
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Safety & Driver Assistance Â
Sierra HD Pro Safety Suite enhancing driver confidence and awareness Â
Forward Collision Alert with Automatic Emergency Braking Â
Front Pedestrian Braking for added safety in busy environments Â
Lane Departure Warning helping maintain confident highway travel Â
Following Distance Indicator for improved driver awareness Â
HD Rear Vision Camera simplifying parking and trailer positioning Â
Teen Driver Mode and Buckle-to-Drive safety technologies Â
Tire Pressure Monitoring System and Rear Seat Reminder for added peace of mind Â
Theft-Deterrent System helping protect your truck and belongings Â
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Exterior Styling & Utility Â
Exterior Colour: Summit White — clean, bold, and timeless with a commanding presence Â
20" Bright Face Aluminum Wheels with Dark Painted Accents for a rugged upscale appearance Â
Chrome Front & Rear Bumpers, Chrome Mirror Caps, and Chrome Door Handles for premium styling Â
Chrome Assist Steps for easier cab access Â
LED Headlamps, LED Fog Lamps, and LED Roof Marker Lamps for enhanced visibility Â
LED Cargo Bed Lighting improving nighttime functionality Â
Spray-On Bedliner protecting the truck bed from heavy-duty wear and tear Â
EZ Lift Power Lock & Release Tailgate for added everyday convenience Â
Bed-Mounted 120V Power Outlet ideal for tools, equipment, or recreational gear Â
Black Front Recovery Hooks adding rugged utility and off-road confidence Â
Rear Bumper CornerSteps making cargo access easier and more practical Â
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Whether you’re towing a large trailer, tackling demanding jobsite duties, or heading off the beaten path, the 2026 GMC Sierra 3500HD SLT delivers uncompromising capability, premium technology, and refined comfort. It’s a heavy-duty truck engineered to work hard while offering the sophistication and confidence expected from a GMC.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, 11,550 lbs. (5239 kg) with single rear wheels (Included and only available with TK30743 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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Alternator, 170 amps (Requires (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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Brake lining wear indicator
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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
-
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 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)5600
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Gross Axle Wt Rating - Rear (lbs)7250
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Curb Weight - Front (lbs)4032
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Curb Weight - Rear (lbs)2928
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Gross Vehicle Weight Rating Cap (lbs)12100
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Gross Combined Wt Rating (lbs)30000
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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)21600
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Fifth Wheel Hitch - Max Tongue Wt. (lbs)5400
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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 CodeQF9
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Rear Tire Order CodeQF9
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Spare Tire Order CodeZYG
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Front Tire SizeLT275/65R20
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Rear Tire SizeLT275/65R20
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Spare Tire SizeLT275/70R18
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Front Wheel Size (in)20 x 8.5
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Rear Wheel Size (in)20 x 8.5
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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)52.7
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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)158.94
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Length, Overall (in)250.75
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Width, Max w/o mirrors (in)81.85
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Height, Overall (in)80.87
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Cab to Axle (in)42.17
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Ground Clearance, Front (in)11.18
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Ground Clearance, Rear (in)11.18
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Cargo Box Length @ Floor (in)82.2
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Cargo Box Width @ Floor (in)71.4
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Cargo Box Width @ Wheelhousings (in)51.85
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Cargo Box (Area) Height (in)21
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Cargo Volume (ft³)69.5
No matches were found.
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