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SIERRA HEAVY DUTY PRO, SLE & SLT AT4 & AT4X DENALI & DENALI ULTIMATE COMPARE TRIMS TRADE-IN APPRAISAL INVENTORY BUILD & BUY

2026 GMC SIERRA HEAVY DUTY

2500 & 3500 HEAVY-DUTY TRUCKS

Sierra 2500 HD AT4 as shown $85,920*

Sierra 3500 HD Denali as shown $92,425*

Sierra 2500 HD Denali Ultimate as shown $94,295*

Lineup of 2026 GMC Sierra HD Heavy Duty Trucks Parked Near Each Other

Vehicles shown throughout with an accessory(ies) from an independent supplier, which are not warranted by GM or its dealers. GM is not responsible for the safety or quality of independent supplier accessories. Any warranty is provided by the accessory manufacturer.

PRO STARTING AT

$46,700*

AVAILABLE TOW UP TO

36,000 LBS.*

KEY FEATURES

AVAILABLE

MULTIPRO™ TAILGATE

AVAILABLE

DURAMAX® 6.6L TURBO-DIESEL V8 ENGINE WITH 975 LB.-FT. OF TORQUE AND 470 HP

AVAILABLE

3500 HD MAX TOWING OF UP TO 36,000 LBS.*

ADVANCED TRAILERING-ASSISTANCE TECHNOLOGIES

UP TO

14 AVAILABLE CAMERA VIEWS*

INCLUDING TRANSPARENT TRAILER VIEW*

AVAILABLE BEST-IN-CLASS*

16-WAY POWER FRONT SEATS WITH MASSAGE FEATURE

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EXPLORE SIERRA HEAVY DUTY TRIMS

The GMC Sierra Heavy Duty is available in the hardworking Pro, the well-equipped SLT, the off-road ready AT4 and the luxurious Denali Ultimate trims.

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As Shown $53,200*

PRO

STARTING AT

$46,700*

AVAILABLE TOW UP TO

36,000 LBS.*

KEY STANDARD FEATURES

  • 6.6L V8 gas engine with 10-speed automatic transmission
  • Trailering Package, Trailering Mirrors and Trailer Brake Controller
  • Best-in-class HD cargo bed volume*
  • Wireless Apple CarPlay®* and wireless Android Auto™* compatibility

KEY AVAILABLE FEATURES*

  • Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
  • Adaptive Cruise Control* with trailering*
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As Shown $57,895*

SLE

STARTING AT

$53,500*

AVAILABLE TOW UP TO

XX,XXX LBS.*

INCLUDES PRO KEY STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • 13.4" diagonal center touchscreen and 12.3" diagonal digital Driver Information Center
  • Traction Select System with Tow/Haul mode*
  • 17" machined aluminum wheels 

KEY AVAILABLE FEATURES*

  • Up to 13 camera views,* including transparent trailer view*
  • MultiPro™ Tailgate and MultiPro Tailgate Audio System by Kicker®*
  • X31 off-road package with twin-tube Rancho® shocks and skid plates
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As Shown $65,795*

SLT

STARTING AT

$64,700*

AVAILABLE TOW UP TO

XX,XXX LBS.*

INCLUDES SLE KEY STANDARD FEATURES, PLUS ADDS OR SUBSTITUTE

  • 10-way power driver and front outboard passenger heated seats with lumbar
  • Heated steering wheel
  • ProGrade® Trailering System* with In-Vehicle Trailering App*
  • 18" machined aluminum wheels with dark grey metallic accents 

KEY AVAILABLE FEATURES*

  • 10-way power-adjustable front heated and ventilated bucket seats with perforated leather appointments
  • MultiPro Tailgate and MultiPro Tailgate Audio System by Kicker*
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As Shown $71,600*

AT4

STARTING AT

$71,600*

AVAILABLE TOW UP TO

21,300 LBS.*

INCLUDES SLT KEY STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Exclusive Jet Black interior with Kalahari accents, and heated and ventilated perforated front leather seating surfaces
  • Exclusive 20" gloss-black aluminum wheels with available BFGoodrich® off-road tires
  • Off-Road Suspension Package with twin-tube Rancho shocks and skid plates
  • Up to 14 available camera views* with HD Surround Vision*
  • Adaptive Cruise Control* with trailering*

KEY AVAILABLE FEATURES*

  • 15" diagonal Head-Up Display* with off-road inclinometer
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As Shown $84,345*

AT4X*

STARTING AT

$83,700*

AVAILABLE TOW UP TO

18,500 LBS.*

INCLUDES AT4 KEY STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Factory-installed 1.5" suspension lift, Multimatic® DSSV dampers, rear electronic-locking differential, larger steel transfer case skid plate and front aluminum skid plate
  • 35" Goodyear® Territory MT tires
  • 16-way heated and ventilated power front seats with massage feature
  • Obsidian Rush interior featuring full-grain leather seating with technical-grain leather accents and authentic Vanta ash wood 

KEY AVAILABLE FEATURES*

  • AT4X AEV Edition featuring stamped steel bumpers, steering gear and transfer case skid plates, and 18" Salta gloss-black wheels
  • Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
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As Shown $75,495*

DENALI 

STARTING AT

$75,000*

AVAILABLE TOW UP TO

30,800 LBS.*

INCLUDES SLT KEY STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • 20" Ultra-Bright machined aluminum wheels with bright chrome inserts*
  • Denali-exclusive authentic wood, patterned aluminum trim and Forge perforated leather seating surfaces
  • 12-way heated and ventilated power front seats

KEY AVAILABLE FEATURES*

  • Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
  • Power sunroof
  • Rear Camera Mirror*
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As Shown $94,295*

DENALI ULTIMATE

STARTING AT

$93,800*

AVAILABLE TOW UP TO

30,700 LBS.*

INCLUDES DENALI KEY STANDARD FEATURES, PLUS ADDS OR SUBSTITUTES

  • Duramax 6.6L Turbo-Diesel V8 engine with 10-speed automatic transmission
  • Signature Vader Chrome grille and exclusive 20" Ultra-Bright machined aluminum wheels with gloss-black inserts*
  • Exclusive Alpine Umber interior featuring full-grain leather seating, authentic Paldao wood and 16-way power front seats with massage feature
  • 12-Speaker Bose* Premium Series with Centerpoint* surround sound
  • Illuminated power assist steps and MultiPro Tailgate Audio System by KICKER*

KEY AVAILABLE FEATURES*

  • Auxiliary trailer camera

CURRENT OFFERS

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2026 VEHICLE TITLE

Ultra Low-Mileage Lease for Well-Qualified Lessees.

$499/MONTH

for 36 months.

SIERRA HD COLORS

Use the tabs to view available trims, exterior and interior colors, and wheels.

    CAPABILITY

    Serious power. Serious trailering.

    Front Three-Quarter View of the 2026 GMC Sierra HD Heavy Duty Truck Driving Down a Dirt Road
    The 2026 GMC Sierra HD Heavy Duty Truck Pulling a Trailer Through a Terrain Back Road

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    SERIOUS TOWING POWER

    The GMC Sierra 2500 HD Crew Cab offers available max towing of up to 21,870 lbs.*

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    INTERIOR

     Premium interiors to make every trip first-class.

    Denali Ultimate with exclusive Alpine Umber interior and full-grain leather seating.

    The Interior View of the Steering Wheel and Dashboard in the 2026 GMC Sierra HD Heavy Duty Truck

    Denali with exclusive authentic wood and Forge perforated leather seating surfaces.

    Driver Side Interior View of the Steering Wheel and Dashboard in the 2026 GMC Sierra HD Heavy Duty Truck

    AT4X with Obsidian Rush interior featuring full-grain leather seating.

    The Front Row Interior Seats of the 2026 GMC Sierra HD Heavy Duty Truck

    AT4 featuring exclusive Jet Black interior with Kalahari accents.

    Close-up of the 2026 GMC Sierra HD Heavy Duty Truck Back Row Jet Black Interior Seats with Kalahari Accents

    SLT with perforated leather appointments.

    Interior View of the Spacious Cabin in the 2026 GMC Sierra HD Heavy Duty Truck
    Close-up of the 2026 GMC Sierra HD Heavy Duty Truck Power Front Seat Controls

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    16-WAY POWER FRONT SEATS WITH MASSAGING FEATURE

    Experience serious comfort in the Sierra Heavy Duty truck’s available best-in-class* 16-way power front seats with massaging feature.

    Close-up of the Premium Materials and Ultimate Trim Nameplate on the 2026 GMC Sierra HD Heavy Duty Truck Seat

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    LUXURIOUS MATERIALS

    Sierra HD Denali Ultimate’s Alpine Umber interior features full-grain leather seating, plaited contrast stitching, and embossed and laser-etched topographical map patterns of its namesake’s mountain summit.

    Interior View of the Spacious Cabin in the 2026 GMC Sierra HD Heavy Duty Truck

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    SPACIOUS CABIN

    The Sierra Heavy Duty truck features best-in-class Crew Cab front head and leg room.*

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    TECHNOLOGY

    Keep informed and in command.

    View of the Dashboard and the Navigation Feature Displayed on the Infotainment Screen in the 2026 GMC Sierra HD
    The Navigation Feature Displayed on the Infotainment Screen in the 2026 GMC Sierra HD

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    13.4" DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM*

    The color touchscreen with Google built-in* compatibility and voice-activated technology for your phone provides a seamless way to customize your entertainment.

    Driver's Seat View of the 2026 GMC Sierra HD Denali Steering Wheel and Driver Information Center

    3 of 3

    12.3" DIAGONAL COLOR DRIVER INFORMATION CENTER*

    GMC Sierra HD features a driver-focused display that puts information front, center and easily visible in high-resolution clarity.

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    EXTERIOR

    Powerfully bold. Impressively stylish.

    Close-up Three-Quarters View of the 2026 GMC Sierra HD Exterior LED Headlamps

    LED PROJECTOR HEADLAMPS AND SIGNATURE LIGHTING

    LED projector headlamps with striking animated sequences help enhance the Sierra Heavy Duty work truck’s impressive exterior design.

    Front View of the Bold 2026 GMC Sierra HD Hauling a RV on a Sandy Road

    BOLD FRONT END

    Stand out everywhere you go with GMC Sierra HD Denali’s iconic chrome grille, front bumper and fascia.

    Close-up Three-Quarters View of the 2026 GMC Sierra HD Exterior LED Headlamps

    LED PROJECTOR HEADLAMPS AND SIGNATURE LIGHTING

    LED projector headlamps with striking animated sequences help enhance the Sierra Heavy Duty work truck’s impressive exterior design. 

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    SAFETY

    Go forth with added confidence.

    The 2026 GMC Sierra HD Heavy Duty Truck Driving Through a Mountain Road and Kicking up Dust

    Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Read the vehicle Owner’s Manual for important feature limitations and information.

    VIEW FULL GALLERY

    Front Three-Quarters View of a 2026 GMC Sierra HD Parked on a Terrain Field Surrounded by Mountains

    VIEW EXTERIOR

    A 2026 GMC Sierra HD Parked Next to a Tent with "View Exterior" Text Overlay
    Wide Interior View of a 2026 GMC Sierra HD Denali Truck

    VIEW INTERIOR

    Close-up of the 2026 GMC Sierra HD Premium Seat Materials with "View Interior" Text Overlay

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