The 2023 GMC Sierra 2500HD is a rugged and powerful heavy-duty truck, ready to tackle any task. Part of the Sierra's 5th generation introduced in 2020, the 2500HD offers two engines: a 6.6-liter V8 gasoline engine with 401 horsepower or a 6.6-liter turbodiesel V8 with a colossal 445 horsepower and 910 lb-ft of torque. Both engines come with a 6-speed automatic transmission. The Sierra 2500HD is available in five trims: base, SLE, SLT, AT4, and the high-end Denali. Depending on the trim, tech features include the ProGrade Trailering system, a 15" Head-Up Display, and an 8" infotainment screen compatible with Apple CarPlay and Android Auto. The Sierra is equally serious about safety, with available features as part of the GMC Pro Safety Plus package, including Forward Collision Alert, Lane Change Alert with Side Blind Zone Alert, and Rear Cross Traffic Alert.