New GMC Sierra 2500 HD Trucks in Auburn, MA

Thoughtful Amenities

The New 2026 GMC Sierra 2500HD for Sale in Auburn

The 2026 GMC Sierra 2500HD is an excellent option for drivers in Auburn and nearby Massachusetts communities seeking a heavy-duty truck that offers both impressive capability and comfort. At DIAMOND GMC in Auburn, MA, we proudly provide this robust pickup for those needing a vehicle that can handle tough workloads while ensuring a comfortable ride. Whether towing heavy equipment, transporting materials for work, or looking for a dependable daily driver, the Sierra 2500HD offers the performance and flexibility required.

Learn More About New GMC Sierra 2500

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

What's New for 2026

The 2026 GMC Sierra 2500HD enhances its longstanding reputation with new features and improved capabilities. It combines GMC's renowned engineering with advanced technology, better trailering options, and the bold styling that makes it easily identifiable. Available in seven trims-Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate-the 2026 Sierra 2500HD is suited for a wide range of needs, from practical work tasks to luxurious comfort.

Performance That Commands Respect

The 2026 GMC Sierra 2500HD comes with two robust engine choices built to handle tough tasks. The standard 6.6-liter eight-cylinder gasoline engine offers 401 horsepower at 5200 rpm and 464 pound-feet of torque at 4000 rpm, utilizing direct injection and variable valve timing for better efficiency and response. For greater towing and hauling power, the optional 6.6-liter Duramax turbo-diesel eight-cylinder produces 470 horsepower at 2800 rpm and an exceptional 975 pound-feet of torque at 1600 rpm, making it perfect for heavy-duty jobs. Both engines are paired with a 10-speed automatic transmission that ensures smooth, responsive shifts in all driving conditions. Drivetrain choices include rear-wheel drive and four-wheel drive, with the AT4 and AT4X trims featuring standard 4WD systems designed for superior off-road performance.

Interior Comfort and Versatility

The 2026 Sierra 2500HD's cabin blends functionality and comfort. It offers various seating options, such as 40/20/40 split-bench seats with covered armrest and under-seat storage, and front bucket seats with a center console on higher trims. Passenger capacity ranges from three to six, based on the configuration. Climate controls include single-zone air conditioning on the Pro trim and dual-zone automatic climate control on higher trims. Features like heated and ventilated front seats, heated rear outboard seats, and a heated steering wheel provide comfort in all weather conditions. Premium trims include perforated leather seats, while the Denali Ultimate boasts full-grain leather, 16-way power-adjustable front seats with lumbar support and massage functions.

Exterior Design and Dimensions

The 2026 GMC Sierra 2500HD makes a striking impression with its bold presence and unique design. It offers various body styles, including Regular Cab Long Bed, Double Cab Standard Bed, Double Cab Long Bed, Crew Cab Standard Bed, and Crew Cab Long Bed. The Crew Cab Long Bed measures 266.8 inches in length, with a 172.0-inch wheelbase, stands 79.7 inches tall, and is 81.8 inches wide. It features animated LED projector headlights with LED turn signals and distinctive daytime running lamps, ensuring excellent visibility and a strong visual impact. Exterior options include chrome or black recovery hooks, a selection of wheel sizes from 17-inch painted steel to 22-inch aluminum, and the GMC MultiPro Tailgate with six functional features for loading and access.

Advanced Safety Features

The 2026 GMC Sierra 2500HD prioritizes safety with the Sierra HD Pro Safety suite. This all-in-one package offers features such as Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, Lane Departure Warning, IntelliBeam automatic high beam control, and Buckle to Drive technology. Standard safety components include dual-stage frontal airbags, seat-mounted side-impact airbags, and head-curtain airbags for both front and rear outboard seats. The StabiliTrak stability control system, equipped with Proactive Roll Avoidance, traction control, electronic trailer sway control, and hill start assist, ensures confident handling across different driving conditions. Optional features comprise HD Surround Vision, Rear Cross Traffic Alert, Lane Change Alert with Side Blind Zone Alert, and Trailer Side Blind Zone Alert, all designed to improve awareness, especially when towing.

Cutting-Edge Technology

The 2026 Sierra 2500HD is equipped with advanced technology to keep you connected and in control. The Pro trim features a seven-inch color touchscreen infotainment system supporting wireless Apple CarPlay and Android Auto. Higher trims are equipped with a 13.4-inch Premium GMC Infotainment System with Google built-in apps, including navigation and voice assistance. The In-Vehicle Trailering App offers checklist functions, trailer maintenance alerts, security notifications, and trailer tire pressure monitoring. Hitch Guidance with Hitch View provides adjustable images with pan, zoom, and tilt for easier trailer hooking. Available tech options include a Rear Camera Mirror, a Multicolor 15-inch Head-Up Display, Bose Premium audio, and wireless charging.

Trim Levels and Standard Features

Pro:

  • 6.6-liter eight-cylinder engine with 10-speed automatic transmission
  • Seven-inch diagonal touchscreen infotainment system
  • Remote keyless entry and 40/20/40 split-bench seating
  • HD Rear Vision Camera and trailering package

SLE:

  • 13.4-inch diagonal Premium GMC Infotainment System
  • 17-inch machined aluminum wheels and cloth seating
  • Deep-tinted glass and SiriusXM with 360L subscription

SLT:

  • Perforated leather-appointed seating with heated front seats
  • Dual-zone automatic climate control and LED fog lamps
  • Power-adjustable vertical trailering mirrors with auto-dimming

AT4:

  • Off-road suspension with Rancho shocks and skid plates
  • HD Surround Vision and Adaptive Cruise Control
  • Bose Premium seven-speaker audio system

AT4X:

  • Driver-selectable e-locking rear differential
  • Power retractable assist steps with LED lighting
  • 35-inch mud-terrain tires and 16-way power seats with massage

Denali:

  • Forge perforated leather seating with heated and ventilated front seats
  • Chrome six-inch rectangular assist steps
  • 20-inch ultra-bright machined wheels

Denali Ultimate:

  • Full grain leather seating with 16-way power adjustment and massage
  • Bose Premium Series 12-speaker audio system
  • Power sunroof and Multicolor Head-Up Display

Visit DIAMOND GMC in Auburn Today

Discover the impressive features and capabilities of the 2026 GMC Sierra 2500HD at DIAMOND GMC in Auburn, MA. Our expert team is ready to assist you in exploring our new vehicle inventory and helping you find the ideal Sierra 2500HD configuration. Whether you're interested in the rugged Pro trim or the upscale Denali Ultimate, we have options to suit your needs. View our current truck selection online, or visit our dealership for a test drive and see why the Sierra 2500HD remains a popular choice among heavy-duty truck buyers in Auburn.

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  1. DIAMOND GMC

    768 WASHINGTON STREET
    AUBURN, MA 01501

    • Sales: (508) 974-3493
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  • Contact our Sales Department at: (508) 974-3493
  • Monday9:00 am - 7:00 pm
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  • Wednesday9:00 am - 7:00 pm
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