New or Significantly Altered Models
- 2004 Buick Rainier
- Buick adds a version of the Trailblazer/Envoy called the Rainier. Buick looks for extra quiet ride and a standard 5.3L V-8 to differentiate the Rainier from other offerings.
Updated Models
- 2004 Buick Rendezvous
- An Ultra trim-level appears for the Rendezvous equipped with a 245hp V6.