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The 2026 GMC Sierra 2500HD is a dominant player in the heavy-duty truck segment. Available in five trim levels – Sierra, SLE, SLT, AT4, and Denali – it boasts formidable towing and hauling capabilities. This truck is powered by two engine choices that include a standard 6.6L V8 with 401 horsepower and an available 6.6L Duramax Turbo-Diesel V8 that impressive 445 horsepower. A 6-speed automatic transmission is paired with the standard engine while the diesel gets a 10-speed automatic. The Sierra 2500HD can be had in either rear-wheel or four-wheel drive configurations. Key safety features include Lane Change Alert with Side Blind Zone Alert, Forward Collision Alert, and Rear Cross Traffic Alert. The infotainment system includes an available 8” diagonal GMC Infotainment System with Navigation, and supports both Apple CarPlay and Android Auto.
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