Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
White
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock #
302287
Trim Details
4WD Crew Cab Standard Box SLT
The 2026 GMC Sierra 3500HD SLT blends professional-grade strength, premium refinement, and advanced technology in a heavy-duty pickup built for the toughest work and the most rewarding adventures. With its bold stance, chrome accents, and thoughtful interior, this Sierra HD delivers capability and comfort in equal measure — perfect for those who demand more from their truck.Â
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Performance & CapabilityÂ
Duramax 6.6L Turbo-Diesel V8 delivering exceptional towing power, long-haul durability, and smooth torque deliveryÂ
10-Speed Allison Automatic Transmission engineered for heavy loads and seamless shiftingÂ
Autotrac 4-Wheel Drive (4WD) with a two-speed transfer case for confident traction in every environmentÂ
3.42 Rear Axle Ratio optimized for trailering and loaded performanceÂ
Standard Suspension Package tuned for stability and comfort while maintaining heavy-duty strengthÂ
Gooseneck/5th Wheel Prep Package for maximum towing versatilityÂ
Trailer Brake Controller, Hitch Guidance & Hitch View, plus a full Trailering App for advanced towing confidenceÂ
Diesel Exhaust Brake for controlled downhill towing and reduced brake wearÂ
Heavy-Duty Cooling Systems including transmission and engine oil coolersÂ
220-Amp Alternator & Heavy-Duty Air Filter designed for demanding useÂ
Black Recovery Hooks for confidence on tough terrainÂ
LT275/70R18 All-Terrain Tires paired with 18" Machined Aluminum Wheels with Dark Grey Metallic accentsÂ
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Winter & Weather ComfortÂ
Heated & Ventilated Front Seats to stay warm in winter and cool during summer haulsÂ
Heated Second-Row Outboard Seats for passenger comfort in colder climatesÂ
Heated Steering Wheel for added winter easeÂ
Remote Vehicle Start to pre-condition the cabinÂ
Dual-Zone Automatic Climate Control with reinforced heating/defrost performanceÂ
Winter Grille Cover for enhanced cold-weather engine performanceÂ
Engine Block Heater for reliable starts in extreme coldÂ
Rear Window Defogger and Rain-Sensing Wipers for clear visibilityÂ
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Interior Comfort & ConvenienceÂ
Front Bucket Seats with power driver/passenger adjustment and memory settingsÂ
Jet Black Interior Trim with premium materials and chrome accentsÂ
12" Reconfigurable Digital Driver Display for crisp, customizable informationÂ
13.4" GMC Premium Infotainment System with Google Built-In for navigation, apps, and seamless connectivityÂ
Wireless Apple CarPlay® & Android Autoâ„¢ plus Wireless ChargingÂ
Bose Premium Audio System delivering rich, immersive soundÂ
Power Sliding Rear Window and Rear Seat Storage Package for added cabin utilityÂ
Universal Home Remote for garage and gate systemsÂ
120V AC Outlets in cabin and bed for powering tools, equipment, or camping gearÂ
Soft-Touch Wrapped Steering Wheel with audio and cruise controlsÂ
Centre Floor Console with ample storage and intuitive layoutÂ
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Safety & Driver AssistanceÂ
Sierra HD Pro Safety Plus offering advanced confidence in every driveÂ
HD Surround Vision & Bed View Camera for full visibility around truck and cargoÂ
Forward Collision Alert & Automatic Emergency BrakingÂ
Lane Departure Warning & Following Distance IndicatorÂ
Front Pedestrian Braking for added awarenessÂ
Rear Cross Traffic Alert & Trailer Side Blind Zone AlertÂ
Front & Rear Park AssistÂ
Safety Alert Seat providing directional warning vibrationsÂ
Teen Driver Mode & Buckle-to-Drive to encourage safe habitsÂ
Tire Pressure Monitoring with Tire Fill Alert for peace of mindÂ
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Exterior Styling & UtilityÂ
Summit White Exterior paired with chrome bumpers, mirror caps, and door handles for a refined HD presenceÂ
LED Headlamps, Fog Lamps & Roof Marker Lamps for signature Sierra illuminationÂ
Chrome Assist Steps for easy access to the Crew CabÂ
Spray-On Bedliner for long-term bed durabilityÂ
LED Cargo Bed Lighting for nighttime loadingÂ
EZ Lift, Power Lock & Release Tailgate for effortless bed accessÂ
Gooseneck/5th Wheel Prep Package & Standard Tailgate with Integrated StepsÂ
Rear Bumper CornerSteps for convenient bed entryÂ
Power-Adjustable, Heated Trailer Tow Mirrors with task lightingÂ
Single Rear Wheel Configuration offering stability and everyday drivabilityÂ
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With its commanding diesel power, premium SLT comfort, and advanced trailering technologies, the 2026 GMC Sierra 3500HD SLT is built to take on the toughest jobs while delivering a refined driving experience. It’s the perfect balance of strength, sophistication, and capability — engineered for those who demand the very best from their heavy-duty truck.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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Seat Belt Adjustable Guide Loops, front row only
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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 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)43.03
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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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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 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)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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