The 1999 Buick Regal is a midsize sedan that belongs to the fifth generation of the model. It comes in GS and LS trims, both powered by a 3.8L V6 engine. The LS trim produces 200 horsepower, while the supercharged engine in the GS trim beefs up the output to 240 horsepower. Both engines are mated to a four-speed automatic transmission. The Regal is offered with front-wheel drive only. Key safety features include dual front airbags and ABS. Inside, you'll find a cabin that is appreciated for its comfort and roominess. Standard features include cloth upholstery, power accessories, and air conditioning. The GS upgrades include leather upholstery and automatic climate control. One of the notable changes for the 1999 Regal was the addition of standard traction control to the base LS model.