The 1999 GMC Sierra 2500 was a part of the truck's first generation. It was available as a regular, extended, and crew cab, with both long and short bed configurations. The Sierra 2500 came with two engine options: a 5.3-liter V8 generating 270 horsepower, and a 6.0-liter V8 pumping out an impressive 300 horsepower. These engines were paired with a smooth four-speed automatic transmission and the truck was available in both RWD and 4WD configurations. The vehicle was well-regarded for its robust build, comfortable ride quality, and powerful performance. Key safety features included ABS brakes and dual front airbags. Though the infotainment features were basic by today's standards, the Sierra offered an AM/FM Radio and a cassette player with an option for a CD player.