New GMC Sierra 3500

2026 GMC Sierra 3500 HD for Sale in Delphi, IN

Mann GMC is proud to offer the all-new GMC Sierra 3500 HD to drivers seeking a heavy-duty truck that delivers exceptional capability and refined features.

This powerful pickup is engineered to handle the most demanding tasks while providing the comfort and technology modern drivers expect.

Whether you need a reliable workhorse for commercial applications or a capable truck for towing recreational equipment, the 2026 GMC Sierra 3500 stands ready to exceed your expectations in Delphi, IN.

Disclaimer: The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.

1Dealer Discount applied to everyone

Performance

The 2026 GMC Sierra 3500 HD offers two impressive engine options designed to deliver the power you need for any job:

  • 6.6-liter, eight-cylinder gasoline engine producing 401 horsepower and 464 pound-feet of torque with variable valve timing and direct injection.
  • 6.6-liter, turbo-diesel eight-cylinder generating 470 horsepower and 975 pound-feet of torque, compatible with B20 biodiesel.

Both engines pair with a 10-speed Allison automatic transmission that delivers smooth shifts and optimal gear selection for various driving conditions.

Available drivetrain configurations include four-wheel drive (4WD) and rear-wheel drive (RWD) options, depending on trim selection, allowing you to choose the setup that best suits your needs.

Technology

The GMC Sierra 3500 comes equipped with advanced technology features that enhance convenience and connectivity:

  • 13.4-inch diagonal premium infotainment display with Google built-in apps, including navigation and voice assistance.
  • Wireless Apple CarPlay and Android Auto capability for seamless smartphone integration.
  • In-vehicle trailering app with trailer maintenance reminders, security alerts, and tire pressure monitoring.
  • Surround vision, providing an overhead view of the area around the vehicle.
  • Multicolor 15-inch diagonal driver's head-up display available on select trims.

Interior

Inside the 2026 GMC Sierra 3500, you will find a cab designed for both work and comfort. Depending on trim level, seating options range from durable vinyl in the Pro trim to full grain leather in the Denali Ultimate. The available front bucket seats with center console offer wireless charging capability. Heated and ventilated seats provide climate control for all seasons.

Crew cab models feature a rear seat storage package with a folding bench, seatback storage compartments, and full cab-width under-seat storage opportunities. Multiple USB ports throughout the cab ensure your devices stay charged during long hauls.

Exterior

The exterior of the refreshed GMC Sierra 3500 showcases bold styling with functional design elements. Animated LED projector headlamps with signature daytime running lamps provide excellent visibility.

The available multi-pro tailgate offers six functional load and access features for enhanced cargo versatility. Chrome recovery hooks, power-adjustable vertical trailering mirrors with integrated turn signals, and available spray-on bed liner demonstrate the attention to practical details. Wheel options range from 17-inch painted steel to 20-inch ultra-bright machined aluminum, depending on your selected trim.

Safety

GMC equips the 2026 GMC Sierra 3500 with comprehensive safety technology to protect you and your passengers:

  • Automatic emergency braking to help avoid or reduce the severity of frontal collisions.
  • Forward collision alert that warns you of potential front-end crashes.
  • Front pedestrian braking to detect and respond to pedestrians in your path.
  • Lane departure warning to alert you when drifting from your lane.
  • Stability control system with proactive roll avoidance and electronic trailer sway control.

Trims

The 2026 GMC Sierra 3500 is offered in several well-equipped trims:

  • Pro - The work-ready trim featuring vinyl seating, 7-inch infotainment display, and essential trailering equipment for commercial applications in Delphi, IN.
  • SLE - Adds the premium 13.4-inch infotainment system display, cloth seating, keyless open and start, and SiriusXM capability.
  • AT4 - Off-road focused trim with Rancho shocks, skid plates, hill descent control, and distinctive styling elements.
  • SLT - Features leather-appointed seating, heated front seats, LED fog lamps, and rain-sensing wipers.
  • Denali - Premium trim offering a Bose audio system, 12-way power seats, surround vision, and distinctive chrome accents.
  • Denali Ultimate - The pinnacle trim with 16-way power seats with massage, full grain leather, a power sunroof, and the Bose premium 12-speaker audio system.

    • FAQs

    The Sierra 3500 HD features a 10-speed Allison automatic transmission across all trim levels. When paired with the diesel engine, this proven transmission delivers exceptional durability and smooth power delivery for heavy towing applications.

    Yes, an available gooseneck and fifth-wheel prep package includes a hitch platform to accept either hitch type, stamped bed holes with removable caps, and a bed-mounted seven-pin trailer harness for convenient hookup.

    The Denali trim includes a Bose premium seven-speaker system, while the Denali Ultimate features a Bose premium series with 12-speaker system, including surround sound and noise compensation technology.

    Mann GMC - Test Drive the New GMC Sierra 3500 in Indiana

    Contact our local Delphi-area GMC dealership to schedule a test drive of the all-new 2026 GMC Sierra 3500.

    Commercial buyers and families also have access to our online finance application to complete from office or home.

    How Can We Help?

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    1. MANN GMC

      1648 W US HWY 421
      DELPHI, IN 46923

      • Sales: (765) 822-3024
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    Get in Touch

    • Contact our Sales Department at: (765) 822-3024
    • Monday8:00 am - 5:30 pm
    • Tuesday8:00 am - 5:30 pm
    • Wednesday8:00 am - 5:30 pm
    • Thursday8:00 am - 5:30 pm
    • Friday8:00 am - 5:00 pm
    • Saturday8:00 am - 1:00 pm
    • SundayClosed