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2026 GMC Sierra 2500HD SLT
Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
Silver
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock #
302137
Trim Details
Crew Cab Standard Box 4-Wheel Drive SLT
The 2026 GMC Sierra 2500HD SLT Crew Cab combines heavy-duty capability, refined design, and advanced technology. With its bold stance, chrome accents, and versatile features, this full-size pickup is engineered for demanding work, adventurous escapes, and everyday comfort.Â
Performance & CapabilityÂ
Engine: Duramax 6.6L V8 Turbo Diesel delivering immense torque and towing strength.Â
Transmission: 10-speed automatic transmission for smooth, responsive power delivery.Â
Drivetrain: 4-Wheel Drive with Autotrac two-speed transfer case, ready for any terrain.Â
Suspension: Off-road-ready X31 suspension package with twin-tube Rancho shocks, skid plates, and hill descent control.Â
Axle Ratio: 3.42 rear axle for balanced towing and hauling efficiency.Â
Trailering Equipment: Integrated trailer brake controller, hitch guidance with Hitch View, and in-vehicle trailering app for precision towing.Â
Drive Modes: FlexRide adaptive mode system for optimized handling across highways, work sites, and off-road trails.Â
Off-Road Readiness: Automatic locking rear differential, reinforced underbody skid protection, and robust all-terrain tires.Â
Winter & Weather ComfortÂ
Heated driver and front passenger seats plus heated steering wheel for year-round comfort.Â
Rear window defogger, rear air vents, and dual-zone automatic climate control with humidity and moisture sensors.Â
Engine block heater ensures reliable cold-weather starts.Â
All-weather floor liners and spray-on bedliner provide durable, easy-to-clean protection.Â
Interior Comfort & ConvenienceÂ
Front bucket seats with power adjustments and driver memory settings for tailored comfort.Â
Wireless charging pad, multiple USB/120V outlets, and dual rear USB ports for complete device connectivity.Â
Keyless open and push-button start for effortless entry and ignition.Â
13.4" premium GMC infotainment touchscreen with Google Built-In, navigation, and wireless Apple CarPlay®/Android Autoâ„¢.Â
12" reconfigurable digital driver display for customizable information at a glance.Â
6-speaker premium audio system for immersive sound throughout the cabin.Â
Power sliding rear window and rear seat with storage package for added utility.Â
Safety & Driver AssistanceÂ
GMC Pro Safety package with Forward Collision Alert, Automatic Emergency Braking, Lane Keep Assist, and Lane Departure Warning.Â
Rear Cross Traffic Braking, Trailer Side Blind Zone Alert, and Rear Pedestrian Alert for enhanced situational awareness.Â
HD Surround Vision and front/rear park assist for precise maneuvering.Â
Teen Driver Mode and Buckle-to-Drive for added driver safety and education.Â
Tire pressure monitoring system and OnStar® safety and emergency services for peace of mind.Â
Exterior Styling & UtilityÂ
20" bright-face aluminum wheels with dark pockets and LT275/65R-20 all-terrain tires for rugged style and performance.Â
Chrome accents including front and rear bumpers, door handles, and mirror caps for a premium look.Â
LED headlamps, fog lamps, roof marker lights, and cargo bed lighting for maximum visibility day or night.Â
GMC MultiPro tailgate with EZ lift and power lock, configurable for loading, step access, or a mobile workstation.Â
Chrome assist steps and black recovery hooks for easy access and confident off-road navigation.Â
Perimeter lighting, gooseneck/5th wheel prep, and 120V bed-mounted power outlet for worksite efficiency.Â
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Whether towing a trailer, hauling heavy loads, or venturing off-road, the 2026 GMC Sierra 2500HD SLT Crew Cab delivers professional-grade strength with refined comfort. Built for drivers who demand power, technology, and sophistication, it stands ready for every challenge with confidence and style.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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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, rear chrome with bumper CornerSteps
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Bed Step, Black integrated on forward portion of bed on driver and passenger side
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CornerStep, rear bumper
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Cargo tie downs (12), fixed, rated at 500 lbs (226.8 kg) per corner
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Wheelhouse liners, rear
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Mouldings, beltline, chrome
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Grille (Chrome surround with Chrome insert bars.)
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Daytime Running Lights
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Automatic Highbeams
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Fog Lamps
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Lamps, cargo area cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
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LED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fob
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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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Privacy Glass
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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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Door handles, chrome
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Tailgate, standard
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Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
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Split Bench Seat
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Leather Seats
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Pass-Through Rear Seat
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Rear Bench Seat
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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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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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Steering wheel, wrapped
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Heated Steering Wheel
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Steering Wheel Audio Controls
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Adjustable Steering Wheel
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Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
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Rear Seat Reminder
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GMC Premium information Display- 13.4" diagonal Multicolour touch screen
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Exterior Temperature Display, located in radio display
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Compass, located in instrument cluster
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Power Windows
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Power Door Locks
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Keyless Entry
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Keyless Start
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Remote Engine 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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Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
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Air vents, 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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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, 10,850 lbs. (4921 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18", 20" or 22" wheels.)
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Keyless Start
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Transfer case, two-speed active, electronic Autotrac with push button control (Requires 4WD models.)
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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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Air filter, heavy-duty
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Air filtration monitoring
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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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In-Vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert when (PTT) trailer tire pressure monitor sensors are installed.)
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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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Suspension Package (Not available with (X31) Off-Road Package.)
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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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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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Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
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Lane Departure Warning
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Seat Belt Adjustable Guide Loops, front row only
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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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Driver Restriction Features
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Tire Pressure Monitor
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Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
No matches were found.
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Vehicle NameGMC Sierra 2500HD
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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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Clutch Size (in)N/A
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Passenger Capacity6
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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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Curb Weight - Front (lbs)4023
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Curb Weight - Rear (lbs)2822
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Gross Vehicle Weight Rating Cap (lbs)11350
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Gross Combined Wt Rating (lbs)26000
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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)18500
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Wt Distributing Hitch - Max Tongue Wt. (lbs)1850
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Fifth Wheel Hitch - Max Trailer Wt. (lbs)19100
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Fifth Wheel Hitch - Max Tongue Wt. (lbs)4775
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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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Cold Cranking Amps @ 0° F (Primary)720
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Maximum Alternator Capacity (amps)170
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Maximum Alternator WattsN/A
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Suspension Type - FrontShort/Long Arm
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Suspension Type - RearMulti-Leaf Springs
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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)2.01
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Shock Absorber Diameter - Rear (mm)2.01
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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 SizeLT275/70R18E
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Rear Tire SizeLT275/70R18E
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Spare Tire SizeLT275/70R18
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Revolutions/Mile @ 45 mph - Front (Rev/Mile)N/A
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Revolutions/Mile @ 45 mph - Rear (Rev/Mile)N/A
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Revolutions/Mile @ 45 mph - Spare (Rev/Mile)N/A
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Front Wheel Size (in)18
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Rear Wheel Size (in)18
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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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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)159
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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)79.82
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Cab to Axle (in)42.17
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Ground Clearance, Front (in)10.12
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Ground Clearance, Rear (in)10.12
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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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