Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
White
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock #
302158
Trim Details
4WD Crew Cab Standard Box SLT
The 2026 GMC Sierra 3500HD SLT stands tall as a powerhouse of durability, refinement, and advanced towing technology. With its bold chrome accents, confident stance, and upscale interior craftsmanship, this heavy-duty truck delivers capability you can trust and comfort you’ll appreciate every day — engineered for those who demand more from both work and travel.Â
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Performance & CapabilityÂ
Engine: Legendary Duramax 6.6L Turbo-Diesel V8 delivering immense torque and long-haul confidenceÂ
Transmission: Smooth and smart 10-speed automatic, optimized for pulling, climbing, and load managementÂ
Drivetrain: Autotrac 4WD with an advanced two-speed transfer case for dependable traction on any terrainÂ
Axle Ratio: 3.42 rear axle for robust towing capability and diesel efficiencyÂ
Suspension: Standard heavy-duty suspension package engineered for stability under maximum loadÂ
Trailering Enhancements: Factory-integrated trailer brake controller, hitch guidance, Hitch View, bed-view camera, and full Trailering App supportÂ
Off-Road Readiness: Skid plates, automatic locking rear differential, and Digital Variable Steering Assist for confident controlÂ
Diesel-Specific Features: Exhaust brake for controlled descents and heavy-load stability, heavy-duty air/oil filtration systemsÂ
Gooseneck/5th-Wheel Prep: Ready for serious towing with in-bed hardware and spray-on bedliner protectionÂ
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Winter & Weather ComfortÂ
Heated Front & Rear Outboard Seats for cold-weather confidenceÂ
Heated Steering Wheel for instant winter warmthÂ
Remote Start System to pre-condition the cabin before you step inÂ
Winter Grille Cover and Engine Block Heater for extreme-temperature startsÂ
Dual-Zone Automatic Climate Control for personalized comfortÂ
Rain-Sensing Wipers for automatic visibility in changing conditionsÂ
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Interior Comfort & ConvenienceÂ
Premium Front Bucket Seats: Power-adjustable driver and passenger with ventilated cooling for warm daysÂ
Driver Memory Settings for seat and mirror personalizationÂ
Power Sliding Rear Window for added ventilation and cargo communicationÂ
Console Storage Package: Deep, organized space for tools, tech, and documentsÂ
Wireless Charging, USB ports throughout, and 120V power outlets in-cab and in-bedÂ
Keyless Open & Push-Button Start for effortless everyday convenienceÂ
13.4" GMC Premium Infotainment System with Google built-in, wireless Apple CarPlay® & Android Autoâ„¢Â
12" Reconfigurable Digital Driver Display with full-color customizationÂ
Bose Premium Audio delivering rich, clear sound on every driveÂ
Rear Seat Storage Package for discreet, functional interior organizationÂ
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Safety & Driver AssistanceÂ
GMC Pro Safety, Pro Safety Plus & SLT Safety Enhancements for comprehensive protectionÂ
Adaptive Cruise Control for smooth highway drivingÂ
Forward Collision Alert & Automatic Emergency BrakingÂ
Lane Departure Warning & Lane Change Alert with Side Blind Zone AlertÂ
Rear Cross Traffic Alert and Rear Seat ReminderÂ
Front & Rear Park Assist, Following Distance Indicator, and Traffic-Aware Safety Alert SeatÂ
HD Surround Vision with multiple camera angles for easier parking and traileringÂ
Trailer Side Blind Zone Alert and integrated trailer camera provisions for towing confidenceÂ
Teen Driver Mode and Buckle-to-Drive for added safety oversightÂ
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Exterior Styling & UtilityÂ
Exterior Color: Summit White — clean, bold, and timelessÂ
Wheels: 20" Bright-Face Aluminum Wheels with dark-accented pockets for a refined, muscular lookÂ
Tires: All-Terrain rubber for on-road comfort and job-site confidenceÂ
Chrome Front & Rear Bumpers, Door Handles & Mirror Caps for an elevated SLT appearanceÂ
LED Headlamps, Fog Lamps & Cargo Lighting for crisp visibility day or nightÂ
LED Roof Marker Lamps emphasizing the heavy-duty stanceÂ
Black Recovery Hooks for added capability and tough visual contrastÂ
Spray-On Bedliner and 120V Bed-Mounted Outlet for work-ready functionalityÂ
Chrome Assist Steps for easy cab accessÂ
Standard Easy-Lift & Power-Locking Tailgate for practical loadingÂ
Bed View Camera for safer trailer hookup and cargo monitoringÂ
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Whether you’re hauling equipment, towing heavy trailers, or driving your family across the country, the 2026 GMC Sierra 3500HD SLT delivers uncompromising strength, premium comfort, and next-generation technology. Built for those who expect true capability without sacrificing refinement, it’s a heavy-duty truck that works as hard as you do — with style to match.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.