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The 2025 GMC Sierra 3500HD is part of the fourth-generation HD series known for its heavy-duty performance and towing capacity. The vehicle is available in 5 trims - Base, SLE, SLT, AT4, and Denali. The engine lineup includes a 6.6-liter V8 producing 401 hp and a Duramax 6.6-liter turbo-diesel V8 pushing out a massive 910 lb-ft of torque, both mated to a 6-speed and a 10-speed automatic transmission, respectively. It offers a Rear Wheel Drive standard with available Four Wheel drive. Key safety features include automated emergency braking, lane-keeping assistance, and blind-spot monitoring. Tech highlights comprise a standard touchscreen infotainment system featuring Apple CarPlay and Android Auto, along with an advanced trailer-towing camera system that's optional on lower trims but standard on the well-equipped Denali trim. With its robust powertrain, the Sierra 3500HD is well-suited to heavy-duty tasks.
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