For which model years did Chevrolet offer the Trailblazer?

From 1999 to 2002, the Trailblazer and Envoy were trim packages for the Chevrolet Blazer and GMC Jimmy, respectively. The Chevrolet Trailblazer/GMC Envoy was a standalone vehicle for the 2002 - 2009 model years in North America, and from 2012 - present in Brazil and Indonesia.