The 2008 Grand Prix is a 4-door, 5-passenger family sedan, or sports sedan, available in two trims, the Sedan and the GXP Sedan.

Upon introduction, the Sedan is equipped with a standard 3.8-liter, V6, 200-horsepower engine. The GXP Sedan is equipped with a standard 5.3-liter, V8, 303-horsepower engine. A 4-speed automatic transmission with overdrive is standard on both trims.

The 2008 Grand Prix is a carryover from 2007.