The Buick Regal has available contoured leather-appointed interior and the power in the Regal GS is a 240 horsepower supercharged V6. The GS is available with performance features like Buick's Gran Touring suspension a four-wheel anti-lock brake system and power rack-and-pinion steering. The 2004 2005 Regal has an optional luxury package like the automatic dual-zone climate control, a power-sliding moonroof, and illuminated steering wheel controls.