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The 2005 Bonneville is a 4-door, up to 6-passenger family sedan, or sports sedan, available in 3 trims, ranging from the SE Sedan to the GXP Sedan.
Upon introduction, the SE Sedan is equipped with a standard 3.8-liter, V6, 205-horsepower engine that achieves 20-mpg in the city and 29-mpg on the highway. The GXP Sedan is equipped with a standard 4.6-liter, V8, 275-horsepower engine that achieves 17-mpg in the city and 24-mpg on the highway. A 4-speed automatic transmission with overdrive is standard on both trims.
The 2005 Bonneville is a carryover from 2004.