The Park Avenue has long been the flagship of Buick's line. It is a traditional luxury offering with lots of features and a soft cushy ride. Although the interior is roomy, it is not roomy enough to warrant the overall size of the car. While the 3.8 litre (205 hp ) V6 provides adequate power for a car of this size, the supercharged Ultra version adds 35 hp for improved performance. The Park Avenue is on the way out to be replaced by a new premium offering.

The fender portholes are standard on all Park Avenues. This is the final model year for the Park Avenue. Buick will introduce a new premium sedan in Fall of 2005. The final 3000 models will be badged as Special Edition.