The 2020 GMC Sierra 2500HD is part of the brand's new generation of heavy-duty pickup trucks, boasting impressive towing capacities and a slew of high-tech features. The vehicle comes with two engine options, a standard 6.6-liter V8 with 401 horsepower and an optional 6.6-liter turbodiesel V8 with 445 horsepower. Both engines pair with a six-speed automatic transmission for the gas engine and a 10-speed for the diesel. Rear-wheel drive is standard, with four-wheel drive available. The Sierra 2500HD comes in five trims: base, SLE, SLT, AT4, and Denali. Safety features include forward collision warning, lane departure warning, and blind spot monitoring. The Technology package provides a surround-view camera system, a head-up display, and a camera-based rearview mirror. Other amenities include a 7-inch infotainment system, Apple CarPlay, Android Auto, and a Wi-Fi hotspot.