2026 GMC Sierra 2500 HD Burlington CO
2026 GMC Sierra 2500 HD
The 2026 GMC Sierra 2500 HD is built as a heavy-duty truck designed for towing, hauling, and work-focused capability across a wide range of configurations. The model lineup includes Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate trims, each aligned with different levels of equipment and design direction. Two engine options define the Sierra 2500 HD platform, including a 6.6L V8 gas engine and an available 6.6L Duramax Turbo-Diesel V8 paired with an Allison 10-speed automatic transmission. In Burlington, CO, the Sierra 2500 HD supports drivers researching a truck structured for demanding workloads and trailering requirements.
The Sierra 2500 HD integrates GMC’s heavy-duty architecture with available drivetrain configurations and a range of bed and cab options. Interior and exterior design vary by trim, with Denali and Denali Ultimate introducing a more refined approach, while AT4 and AT4X focus on off-road capability. Across the lineup, the Sierra 2500 HD maintains a consistent structure centered on strength, durability, and configuration flexibility.
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Trim Levels (Exterior)
The 2026 GMC Sierra 2500 HD is available in Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate trims, each presenting a distinct exterior identity. Pro establishes a work-focused design, while SLE and SLT introduce additional refinement. AT4 and AT4X emphasize off-road positioning, and Denali and Denali Ultimate present a more premium exterior design within the heavy-duty truck lineup.
Engine (Power)
The 2026 GMC Sierra 2500 HD offers a 6.6L V8 gas engine and an available 6.6L Duramax Turbo-Diesel V8, both paired with an Allison 10-speed automatic transmission. These powertrain options support heavy-duty performance across a range of towing and hauling applications. Rear-wheel drive and available four-wheel drive configurations provide flexibility across trims.
Performance
The Sierra 2500 HD is structured for high-capability performance, supporting towing and hauling demands across job sites and trailering conditions. Its heavy-duty platform is designed to maintain stability and control under load, with drivetrain and suspension configurations aligned to different use cases. The Sierra 2500 HD supports a range of performance-focused applications across its trim lineup.
Interior
The interior of the 2026 GMC Sierra 2500 HD integrates a structured cabin layout with technology systems and materials that vary by trim level. Denali and Denali Ultimate introduce a more refined interior environment, while lower trims maintain a functional layout focused on work usability. The cabin supports driver interaction with controls and displays designed for both everyday driving and job-focused operation.
Safety Features
The 2026 GMC Sierra 2500 HD includes GMC Pro Safety, a suite of driver assistance technologies designed to support awareness and control across different driving conditions. Additional trailering-focused systems integrate camera views and monitoring features that assist with towing visibility and operation. These systems are integrated across the Sierra 2500 HD lineup.
May not represent actual vehicle. (Options, colors, trim and body style may vary)
The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.