Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
White
Interior Colour
Brown
Transmission
Automatic
Drivetrain
4×4
Stock #
302161
Trim Details
4WD Crew Cab Standard Box SLT
The 2026 GMC Sierra 3500HD SLT combines heavy-duty muscle, premium craftsmanship, and advanced technology to deliver a truck built for those who demand strength without sacrificing refinement. With its imposing stance, polished chrome accents, and intelligent trailering systems, this HD pickup stands ready for the toughest jobs and the longest journeys — all while surrounding its driver in true SLT comfort.Â
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Performance & CapabilityÂ
Engine: 6.6L Duramax Turbo-Diesel V8 delivering immense torque, confident pulling power, and proven long-haul dependabilityÂ
Transmission: 10-Speed heavy-duty automatic engineered for smooth, controlled shifts under substantial loadÂ
Drivetrain: Autotrac 4-Wheel Drive with a two-speed transfer case for robust traction in mud, snow, and rugged terrainÂ
Suspension: Standard HD suspension tuned for stability when hauling or trailering at maximum capacityÂ
Rear Axle: 3.42 ratio optimized for torque delivery and heavy-duty towing performanceÂ
Engine Exhaust Brake & Heavy-Duty Cooling Systems for controlled downhill driving and reliable performance under extreme workloadÂ
Gooseneck/5th Wheel Prep Package ready for high-capacity towingÂ
Trailering Technology: Integrated trailer brake controller, Hitch Guidance with Hitch View, Trailer Side Blind Zone Alert, Trailer Camera Provisions, Bed View Camera, and full trailering appÂ
Drive Modes: FlexRide mode selector for optimized performance in varying terrain and weather conditionsÂ
Protective Features: Skid plates and heavy-duty air filtration for durability in rough operating environmentsÂ
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Winter & Weather ComfortÂ
Heated & Ventilated Front Seats ensure comfort from scorching summers to freezing wintersÂ
Heated Rear Outboard Seats & Heated Steering Wheel for passenger and driver warmthÂ
Remote Vehicle Start to pre-condition the cabinÂ
Dual-Zone Automatic Climate Control maintains steady cabin temperaturesÂ
Winter Grille Cover & Heavy-Duty Heater/Defroster System for cold-weather performanceÂ
Engine Block Heater supporting reliable diesel starts in severe conditionsÂ
Rainsense Wipers & Rear Defogger for visibility during storms or snowÂ
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Interior Comfort & ConvenienceÂ
Premium Dark Walnut/Slate Interior offering a refined, upscale atmosphereÂ
Front Bucket Seats with Power Adjustments and driver memory settings for tailored comfortÂ
Wireless Charging Pad, dual 120V power outlets, and multiple USB ports throughout the cabinÂ
Power Sliding Rear Window & Rear Seat Storage Package for extra versatility and organizationÂ
Keyless Open & Push-Button Start for effortless entry and ignitionÂ
13.4" GMC Premium Infotainment Touchscreen with Google Built-In, navigation, and smartphone integrationÂ
12" Reconfigurable Digital Driver Display with customizable layoutsÂ
Bose® Premium Audio System delivering crisp, immersive soundÂ
Auto-Dimming Rearview Mirror & Illuminated Visors enhancing daily comfortÂ
Quiet Cabin Engineering: acoustic insulation and refined diesel tuning create a calm, controlled interiorÂ
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Safety & Driver AssistanceÂ
Sierra HD Pro Safety & Safety Plus for enhanced on-road confidenceÂ
Automatic Emergency Braking, Forward Collision Alert & Front Pedestrian BrakingÂ
Lane Departure Warning & Following Distance IndicatorÂ
Rear Cross Traffic Alert, Rear Pedestrian Alert & Rear Seat ReminderÂ
HD Surround Vision giving a full 360° view around the truckÂ
Bed View Camera & Trailer Camera Provisions for full towing awarenessÂ
Safety Alert Seat providing intuitive haptic warningsÂ
IntelliBeam Auto High Beams for improved nighttime visibilityÂ
Teen Driver Mode & Buckle-to-Drive add extra safety reinforcementÂ
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Exterior Styling & UtilityÂ
Bold SLT Presence: Chrome bumpers, chrome mirror caps, chrome door handles, and SLT signature detailingÂ
Exterior Colour: Summit White, crisp and commandingÂ
20" Bright-Face Aluminum Wheels paired with all-terrain tires for premium looks and rugged capabilityÂ
LED Headlamps, Fog Lamps & Roof Marker Lamps for maximum clarity and HD truck presenceÂ
Spray-On Bedliner & Steel Bed Construction built for durability on job sites and long haulsÂ
EZ-Lift Power Lock and Release Tailgate for easy loadingÂ
MultiPro Tailgate Compatibility for added utility (if equipped)Â
Chrome Assist Steps & CornerSteps making entry and bed access simpleÂ
120V Bed-Mounted Outlet & LED Cargo Lighting support tools, gear, and nighttime workÂ
Black Recovery Hooks & Aero Shutters balancing function and efficiencyÂ
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The 2026 GMC Sierra 3500HD SLT blends relentless towing strength with premium SLT refinement, creating a heavy-duty truck ready for demanding worksites, long-distance trailering, and family travel alike. It’s power, comfort, and capability — elevated to GMC’s professional-grade standard.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 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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* Every reasonable effort is made to ensure the accuracy of the information listed above. Vehicle pricing, incentives, options (including standard equipment), and technical specifications listed is for the 2026 GMC Sierra 3500HD SLT may not match the exact vehicle displayed. Please confirm the accuracy of this information with a sales representative.