2026 GMC Sierra 2500 HD SLE

  • New
$66,525Details
DIAMOND GMC
Location Details
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    The overview

    Exterior Color
    Onyx Black
    Interior Color
    Jet Black, Cloth seat trim
    Transmission
    Automatic
    Drivetrain
    4WD
    Engine
    6.6L V8 Gas engine
    VIN
    1GT4UME77TF251232
    Stock Number
    SI26750
    • In Transit
    • Basic: 3 Years/36,000 Miles
    • Corrosion: 3 Years/36,000 Miles, Rust-Through, 6 Years/100,000 Miles
    • Drivetrain: 5 Years/60,000 Miles, 3.0L & 6.0L Duramax® Turbo-Diesel engines, and certain commercial, government, and qualified fleet vehicles: 5 years/100,000 miles
    • Maintenance: First Visit: 12 Months/12,000 Miles
    • Roadside Assistance: 5 Years/60,000 Miles, 3.0L & 6.0L Duramax® Turbo-Diesel engines, and certain commercial, government, and qualified fleet vehicles: 5 years/100,000 miles
    • Warranty: <<< Preliminary 2026 Warranty >>>
    • Max seating capacity: 5
    • Fuel System: Direct Injection
    • Fuel tank capacity: 36 gal
    • Horsepower: 401
    • Towing capacity: 16000 lbs
    • 13.4" diagonal GMC Premium Infotainment System with Google built-in:
      • 13.4" diagonal GMC Premium Infotainment System with Google built-in, includes multi-touch display, AM/FM/SiriusXM1 radio capable
      • Bluetooth®2 streaming audio for music and select phones
      • Wireless Apple CarPlay™ capability for compatible phones3
      • Wireless Android Auto™ capability for compatible phones4
      • Customize and manage entertainment and vehicle feature setting
      • Use, control and manage select smartphone apps through the Infotainment system
      • Voice-activated technology for phone
    • 6-speaker audio system:
      • Speakers are positioned throughout the cabin for outstanding sound quality and an enjoyable listening experience
    • Bluetooth®:
      • Pair your compatible mobile phone to your vehicle's infotainment system1
      • Place and receive hands-free phone calls
      • Store your phone's contact list in the system to place an outgoing call quickly using the touch-screen display or voice command system
      • With streaming audio capability, you can listen to files stored on your phone or Bluetooth digital media device
    • SiriusXM with 360L Trial Subscription:
      • With your trial subscription, new GM vehicles equipped with SiriusXM with 360L advance in-car technology will bring you closer to your favorite stars, artists, creators, hosts and athletes1
      • SiriusXM with 360L transforms your ride with our most extensive and personalized radio experience on the road that lets you enjoy ad-free music, talk and news, live sports, comedy, podcasts and more
      • Experience SiriusXM wherever you go in your vehicle and on the SiriusXM app with personalization features to make discovering your perfect entertainment easier than ever before
    • Wi-Fi® Hotspot capable:
      • Terms and limitations apply. See onstar.com or dealer for details.
      • May require additional optional equipment
    • Wireless phone projection:
      • For Apple CarPlay™1 and Android Auto™2
    • 18" LT275/70R18 all-terrain, blackwall spare tire:
      • May require additional optional equipment
    • 18" LT275/70R18E all-terrain, blackwall tires
    • 18" machined aluminum wheels with Dark Grey metallic accents
    • 6" Chrome rectangular assist steps (factory installed):
      • Steps make it easier to get in and out of your vehicle
      • Textured step pads help provide secure footing
      • May require additional optional equipment
    • Animated LED projectors headlamps with LED turn signals and Daytime Running Lamps
    • Black outside power-adjustable vertical trailering mirrors:
      • Lower convex mirrors
      • Heated upper glass
      • Integrated turn signal indicators
      • Manual folding/extending
      • Extends 3.31-inches
      • May require additional optional equipment
    • Body-color door handles
    • Cab-mounted cargo area lamps:
      • Activated by switch located on center switch bank
      • Illuminates the cargo bed area
    • Cargo bed LED lighting:
      • Provides light to find cargo in the bed
      • May require additional optional equipment
    • Cargo tie-downs:
      • 12-fixed rated at 500 lbs. per corner
    • Chrome beltline moldings
    • Chrome front bumper:
      • May require additional optional equipment
    • Chrome rear bumper:
      • With integrated CornerSteps
      • May require additional optional equipment
    • CornerStep rear bumper:
      • Helps make it easier to get into and out of the pickup bed
      • Located at each end of the rear bumper
      • Textured step pads to help provide secure footing
    • Deep-tinted glass:
      • Provides added protection from sun and glare
    • Front license plate bracket:
      • Front bracket is included if displaying a front license plate is required in your state
    • IntelliBeam:
      • At speeds above 25 mph, can automatically turn vehicle's high beams on and off according to surrounding traffic conditions1
    • LED fog lamps
    • LED tail lamps
    • Side Bed Step:
      • Black textured step pads help provide secure footing
      • Integrated on forward portion of outer bed on driver and passenger side to provide ease of access to forward portion of the bed
    • Smoked Amber LED roof marker lamps:
      • Roof-mounted lamps near the front of the cab
    • Spare tire carrier lock:
      • Helps keep spare tire secure
    • Spray-on bedliner:
      • Provides a Black, textured, non-skid surface that helps protect the bed and minimizes cargo shifting
      • Covers the entire bed surface below side rails, front box top rail, gauge hole plugs and tie-downs
      • Chemically bonded, the sprayed-on liner permanently bonds to the truck bed, providing a watertight seal
      • Does not include spray-on liner on tailgate due to Black composite inner panel
      • Includes GMC logo on all trims except PRO
    • Standard tailgate
    • Tailgate and bed rail protection caps
    • Tailgate with EZ Lift assist, power lock & release:
      • Hitch area lighting
      • May require additional optional equipment
    • 10-way power driver seat with power lumbar:
      • Includes 8-way power driver seat
      • Includes a 2-way power lumbar control
    • 12.3" diagonal color Driver Information Center:
      • Includes driver personalization, warning messages and vehicle information
      • Replaces traditional analog gauges with fully reconfigurable high definition cluster layout
      • High definition display provides crisp, premium appearance
    • 120-volt box-mounted power outlet:
      • 3-prong auxiliary household-style outlet
      • Located in the pickup bed
      • May require additional optional equipment
    • 120-volt power outlet:
      • 3-prong auxiliary household-style outlet
      • Located on the instrument panel
      • Makes it convenient for powering laptops, phone chargers and other electronic devices
      • May require additional optional equipment
    • 13.4" diagonal GMC Premium Infotainment System with Google built-in:
      • 13.4" diagonal GMC Premium Infotainment System with Google built-in, includes multi-touch display, AM/FM/SiriusXM1 radio capable
      • Bluetooth®2 streaming audio for music and select phones
      • Wireless Apple CarPlay™ capability for compatible phones3
      • Wireless Android Auto™ capability for compatible phones4
      • Customize and manage entertainment and vehicle feature setting
      • Use, control and manage select smartphone apps through the Infotainment system
      • Voice-activated technology for phone
    • 4-way manual driver seat
    • 4-way manual front passenger seat
    • 40/20/40 split-bench front seat with under-seat storage:
      • Seating for up to 3
      • Driver and front passenger seatbacks recline
      • Head restraints at the outboard seating positions
      • Center seatback that doubles as a fold-down armrest with storage
    • 60/40 split-folding rear bench seat:
      • Includes child seat top tether anchor
      • Can fold one or both sides up
    • Adaptive Cruise Control:
      • Automatically follows a detected vehicle ahead at a driver-selected following gap1
      • If no vehicle is detected in your path, works like regular cruise control
      • You can always override the feature and take control
      • Adaptive Cruise Control is compatible with Trailering. It is important to ensure your trailer has functioning brakes while trailering with heavier loads. Read your Owner's Manual to review Trailer Brake requirements and to learn more about the limitations of this system.
    • All-weather floor liners:
      • Provides coverage for first and second-row seating
      • Feature a textured, anti-slip pattern that helps trap debris and water while providing carpet coverage
      • Include Brand logo
      • Replaces factory floor mats
    • Assist handles:
      • Front A-pillar mounted for Driver and Passenger
      • Rear B-pillar mounted
    • Carpeted floor covering:
      • Color-keyed to match the interior
    • Cloth rear seat with storage package:
      • 60/40 folding bench, Seats 3
      • Includes child seat top tether anchors
      • Can fold one or both sides up
      • Seatback storage on left and right side
      • Center fold out armrest with 2 cupholders
      • Underseat storage
    • Compass:
      • Located in instrument cluster
    • Dual-zone automatic climate control:
      • Automatically maintains the selected temperatures for both the driver and front passenger
      • Allows individual climate settings for both driver and front passenger
      • Driver and front passenger can choose a temperature up to 30 degrees difference
      • May require additional optional equipment
    • Front rubberized-vinyl floor mats:
      • Helps protect your interior from road debris and the elements
      • May require additional optional equipment
    • Heated driver and front outboard passenger seats:
      • Separate buttons on the climate control panel allow you to choose from 3 levels of warmth
      • At the touch of a button you can warm the cushions and seatbacks with multilevel temperature control
      • Individually controlled
      • Seats can be programmed to automatically warm up when it's cold out
      • May require additional optional equipment
    • Heated steering wheel:
      • With the press of a button the steering wheel quickly heats up to provide additional comfort on a cold day
      • May require additional optional equipment
    • Inside rearview manual day/night mirror:
      • Adjust the tilt of the mirror to help reduce glare during nighttime driving
    • Keyless Open and Start:
      • With the key fob in your possession, lock and unlock your car's doors by pressing the button on a front exterior door handle, increasing convenience
      • Lockout protection helps you avoid locking keys in the vehicle
    • Manual tilt and telescoping steering column:
      • Allows the driver to adjust the steering wheel up or down, and the steering column forward or back
      • May require additional optional equipment
    • Outside temperature display:
      • Located in infotainment display
    • Power door locks:
      • Allows you to lock and unlock doors easily whether it's from the driver or front passenger seat or from outside using the key fob (when equipped)
    • Power sliding rear window with rear defogger:
      • Utilizes a warming grid to remove fog or frost from the rear window
      • The window switch is conveniently located in the overhead console for easy 1-touch operation
      • May require additional optional equipment
    • Power windows with driver express-up/down:
      • Quickly raises the window or lowers it with the touch of a button
      • If an obstruction is detected, the anti-pinch feature will auto-reverse
    • Power windows with front passenger express-down:
      • Quickly lowers the window with the touch of a button
      • If an obstruction is detected, the anti-pinch feature will auto-reverse
    • Power windows with rear express-down
    • Rear Seat Reminder:
      • Helps to remind the driver to check the back seat(s) before leaving the vehicle1
      • Activates when rear doors are opened and closed up to 10 minutes before or anytime while your vehicle is on
      • Under certain conditions, once the vehicle is switched off, designed to sound audible chimes and display a visual message within the driver display
      • Activates only once each time the vehicle is turned on and off, and would require re-activation on a second trip
    • Rear air vents:
      • Provides cabin comfort for rear occupants
    • Rear rubberized-vinyl floor mats:
      • Helps protect your interior from road debris and the elements
      • May require additional optional equipment
    • Rear window defogger:
      • Utilizes a warming grid to help remove fog or frost from the rear window
    • Remote Start:
      • Start your vehicle remotely and step into a comfortably warmed or cooled vehicle, depending on the weather and your preset preferences
      • Locks doors and turns on parking lamps while the engine is running
      • Activates the climate control system
    • Single-zone manual climate control:
      • Maintains a selected temperature
    • Steering-wheel mounted controls:
      • Allow the driver to easily operate the audio system and phone interface controls
      • May require additional optional equipment
    • Theft-deterrent unauthorized entry system:
      • Sounds the horn and flashes the turn signals when someone attempts to open the vehicle without the proper key or remote transmitter
      • Helps deter unauthorized entry, helping to protect your vehicle
      • May require additional optional equipment
    • USB ports:
      • (2) Charge ports located on rear of console1
    • USB ports:
      • (2) Data/charge ports located on instrument panel1
    • Universal Home Remote:
      • 3-channel programmable
      • Conveniently activates compatible devices such as garage door openers, security systems, and home automation devices from inside your vehicle
      • May require additional optional equipment
    • Wrapped steering wheel
    • 10,850 lbs. GVWR:
      • When properly equipped; includes weight of vehicle, passengers, cargo and equipment
    • 10-speed automatic transmission:
      • Tow/Haul mode reduces shift cycling for better control and improved cooling when towing or hauling heavy loads
      • Electronically controlled with overdrive
      • Auto Grade Braking that automatically downshifts when needed to enable engine braking, helping to slow the vehicle on downhill grades and reduce brake wear (operates in Tow/Haul mode)
    • 220-amp alternator:
      • May require additional optional equipment
    • 3.73 rear axle ratio:
      • Requires a gas engine
    • 4-wheel antilock disc brakes:
      • Help reduce wheel lockup and maintain steering control during hard braking on most slippery surfaces
      • DuraLife™ brake rotors feature a hardened surface to reduce corrosion and provide quieter braking with less vibration. DuraLife™ rotors are hardened and strengthened during the manufacturing process
      • Brake system features a corrosion-fighting process called Ferritic Nitro-Carburizing (FNC) which can double rotor life expectancy and reduce or minimize rust over non-FNC coated rotors
    • 6.6L V8 Gas engine:
      • 401 hp [299 kW] @ 5200 rpm
      • 464 lb-ft of torque [629 N-m] @ 4000 rpm
      • 3.73 rear axle ratio
      • Paired with an Allison® 10-speed automatic transmission
      • Capless fuel fill
    • Air filtration monitoring:
      • Alerts the driver when the engine air filter needs replacement
    • Automatic locking rear differential:
      • When the differential senses a significant difference in wheel speed, it locks to turn both rear wheels in unison for added traction
      • The Eaton® Locker senses a difference in wheel speed of approximately 100 rpm
    • Black vertical recovery hooks:
      • Two front frame-mounted1
    • Brake pad wear indicator
    • Capless fuel fill:
      • Prevents paint scratches that can result from a tethered fuel cap
      • Creates a tight seal around the fuel-pump nozzle when the nozzle is fully inserted
      • Requires gasoline engine
    • Electronic shift 2-speed transfer case with push button controls:
      • System shift smoothly between drive settings to handle a variety of road conditions
      • 2WD High for most on-road and highway situations
      • 4WD High for snowy or wet roads when added traction is needed
      • 4WD Low for deep sand, mud or snow to provide maximum torque to all 4 wheels
      • May require additional optional equipment
    • External auxiliary transmission oil cooler:
      • Heavy-duty air-to-oil cooler
      • Helps provides optimal transmission performance even when operating under a heavy load or towing a trailer
      • May require additional optional equipment
    • External engine oil cooler:
      • Heavy-duty air-to-oil cooler
      • Helps extend engine oil life under heavy loads
    • Fully boxed frame:
      • Hydroformed front section
      • High-strength steel
    • Heavy-Duty Air Filter:
      • Thick construction helps to trap more dirt before it can enter the air intake
    • Heavy-duty 720 cold-cranking amps battery:
      • 80 Amp-hr
      • Maintenance-free with rundown protection and retained accessory power
      • May require additional optional equipment
    • Hill Descent Control:
      • Uses antilock braking to help provide a smooth, controlled descent
      • Helps driver maintain control of the vehicle without depressing the brake pedal
      • Activates by pushing a button below the instrument panel
      • May require additional optional equipment
    • In-Vehicle Trailering App:
      • Checklist1
      • Trailer maintenance reminders
      • Trailer security alerts
      • Trailer mileage
      • Tow/haul reminder
      • Trailer electrical diagnostics
      • Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed
    • Integrated trailer brake controller:
      • Integrated with the antilock brake system (ABS)
      • Helps provide measured brake force signaling to electric-controlled trailer brake systems
      • Trailer gain and output are displayed in the Driver Information Center
    • Off-Road suspension:
      • May require additional optional equipment
    • Pickup bed:
      • Roll-formed high-strength steel
      • Includes bed assist step
    • Push Button Start
    • Skid plates:
      • Help protect the front underbody, oil pan and transfer case
      • May require additional optional equipment
    • Steering:
      • Recirculating Ball with smart flow power steering system
    • Remote Start Package:
      • Remote Start
      • Content theft alarm
      • Rear-window defogger
    • SLE Convenience package:
      • Dual climate control
      • 10-way power driver seat including power lumbar
      • Manual tilt/telescoping steering column
      • LED roof marker lamps
      • LED fog lights
    • SLE Heat package:
      • Heated driver and passenger seats
      • Heated steering wheel
    • SLE Preferred Package:
      • Universal Home Remote (Crew Cab and Double Cab only)
      • Rear sliding power window (Crew Cab and Double Cab only)
      • Hitch Guidance with Hitch View1
      • In-vehicle Trailering App
      • Adaptive Cruise Control1
      • Cargo bed LED lighting
      • May require additional optional equipment
    • SLE Value Package:
      • Only available on Crew Cab and Double Cab models
      • SLE Convenience package
      • Spray-on bedliner
      • SLE Heated package
      • Remote Start Package
    • Sierra HD Pro Safety:
      • Forward Collision Alert1
      • Following Distance Indicator1
      • Front Pedestrian Braking1
      • IntelliBeam
      • Lane Departure Warning1
      • Buckle to Drive
      • Automatic Emergency Braking1
    • Snow Plow Prep / Camper Package:
      • Power feed to accommodate a backup and roof emergency light1
      • A single 220-amp alternator
      • Heavy-duty front springs
      • Under body skid plates to help protect the transfer case from debris
      • May require additional optional equipment
    • Trailering Package:
      • Trailer hitch1
      • Trailering hitch platform
      • Includes a 2.5" receiver hitch (with 2" insert), 4-pin and 7-pin connectors
      • 7-wire electrical harness and 7-pin sealed connector for connecting your trailer's lights and brakes to your vehicle
      • Hitch Guidance2
      • May require additional optional equipment
    • X31 Off-Road Package:
      • Off-Road suspension
      • Hill Descent Control
      • Skid plates
      • Twin-tube Rancho shocks
      • X31 hard badge
      • May require additional optional equipment
    • LED Daytime Running Lamps
    • Signature LED Daytime Running Lamps
    • 6 airbags:
      • Dual-stage frontal airbags for driver and front outboard passenger1
      • Seat-mounted side-impact airbags for driver and front outboard passenger1
      • Head-curtain airbags for outboard seating positions1
      • Includes front outboard Passenger Sensing System for frontal outboard passenger airbag and illuminates a status light that indicates whether the airbag is on or off1
    • Buckle to Drive:
      • Helps remind the driver to buckle their seat belt before driving by preventing the vehicle from being shifted out of PARK temporarily when the driver's seat belt is not buckled
      • The feature also reminds the front passenger to buckle up, if equipped
    • Following Distance Indicator:
      • Displays the following time in seconds between your vehicle and a detected vehicle in front of you1
      • Designed to help you maintain a safe following distance
    • Forward Collision Alert:
      • Warns you if it detects a potential collision with a detected vehicle you're following so you can take action1
      • Can also provide a tailgating alert if you're following a vehicle much too closely
    • HD Rear Vision Camera:
      • Shows high-resolution digital image of area directly behind your vehicle while in Reverse1
      • Can help you park or avoid vehicles and objects
      • You can also display an overlay of where your vehicle is heading
      • Tailgate must be in the raised position for the HD Rear Vision Camera to operate properly
      • May require additional optional equipment
    • Hitch Guidance:
      • When in Reverse, displays a centered guideline on the Rear Vision Camera view1
      • Can help you line up the hitch to your trailer
      • When driving, lets you check the trailer using Rear Vision Camera view
    • Hitch View:
      • Shows a close-up view of the trailer hitch1
      • In Reverse, the view can be used to line up your hitch to your trailer
      • When driving, the view can be used to check your trailer hitch
      • Shifting to Park automatically engages the Electric Parking Brake (if equipped)
      • May require additional optional equipment
    • Lane Departure Warning:
      • Alerts you when it detects that you are unintentionally drifting out of detected lane lines1
      • System alerts do not occur if you're using your turn signal, or it detects you may be intentionally leaving your lane
    • OnStar Basics:
      • Drive confidently with core OnStar services including1
        • Remote commands
        • Built-in voice assistance
        • Real-time traffic and navigation
        • Automatic Crash Response
    • OnStar® services capable:
      • See onstar.com for details and limitations. Services vary by model. Service plan required.
    • Rear Seat Belt Indicator
    • Seat Belt Adjustable Guide Loops:
      • Front row only
    • Teen Driver:
      • Helps encourage safe driving habits for teens by providing an in-vehicle report card1
      • Activates certain safety systems, if equipped, when a Teen Driver-designated key fob is used
      • Mutes the radio until the front-seat occupants fasten their seat belts
    • Tire Pressure Monitoring System with Tire Fill Alert:
      • Monitors tire pressure and alerts of an under-inflated condition in one or more of the tires1
      • Provides visual and audible alerts outside the vehicle when inflating an under inflated tire to the recommended tire pressure
    • Trailering Information Label:
      • Provides max trailer ratings for tongue weight, conventional, gooseneck hitch and 5th wheel hitch
    • Automatic Emergency Braking:
      • Can help you avoid or reduce the severity of a collision with a detected vehicle you're following using camera technology1
      • Can automatically provide hard emergency braking or enhance your hard braking
      • Works at speeds between 5 and 50 mph
    • Front Pedestrian Braking:
      • At speeds between 5 and 50 mph, can help you avoid or reduce the severity of a collision with a pedestrian it detects directly in front of you1
      • Provides pedestrian alerts and can automatically provide hard emergency braking or enhance driver's hard braking
      • Limited nighttime and low visibility performance
    • StabiliTrak, electronic stability control system with traction control:
      • Automatically helps enhance control, particularly during emergency maneuvers, by adjusting the brakes and engine torque to help you stay on your intended path
      • Activates when vehicle sensors detect a difference between the driver's intended path and the direction the vehicle is actually travelling
      • Includes Traction Control that detects wheel slippage and applies brake pressure and/or reduces engine power to help the driver maintain control when accelerating on wet or snow-covered roads
      • Includes Brake Assist which detects rapid brake pedal applications due to emergency braking situations and provides additional braking via the Antilock Brake System (ABS) module
      • Includes Trailer Sway Control
      • Hill Start Assist
    Your satisfaction is our business!  Check out this 2026!

    A comfortable ride in a go-anywhere vehicle! Top features include cruise control, automatic temperature control, a bedliner, and 1-touch window functionality. Smooth gearshifts are achieved thanks to the powerful 8 cylinder engine, and for added security, dynamic Stability Control supplements the drivetrain. Four wheel drive allows you to go places you've only imagined.

    Our sales staff will help you find the vehicle that you've been searching for. We'd be happy to answer any questions that you may have. Please don't hesitate to give us a call.

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    DIAMOND GMC is dedicated to your satisfaction before, during, and after your purchase. We'll go the extra mile to take care of you.
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      Disclaimer: The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price. We are not responsible for typographical errors. Our pricing changes daily and may not show updated.

      1 Dealer Discount applied to everyone