The 2016 GMC Sierra 3500HD, a part of the model's third generation (2014-2018), is a powerful full-size pickup truck with four available trims: base, SLE, SLT, and Denali. Buyers have a choice of two engines, a 6.0L V8 producing 360 hp and a 6.6L turbodiesel V8 delivering a massive 397 hp and 765 lb-ft of torque, paired with a six-speed automatic transmission. Rear-wheel drive is standard, with four-wheel drive optional. Inside, an 8" infotainment system supports Apple CarPlay and Andriod Auto. New for 2016 was the addition of a standard locking tailgate and optional gooseneck/fifth-wheel trailering prep package. The GMC Sierra 3500HD is also well-decked in safety features, offering stability control, antilock disc brakes, and an array of airbags. Higher trims add more advanced safety equipment, such as front and rear parking sensors.