The TrailBlazer nameplate was introduced in 1999 as an upscale trim line of the . In 2002, the TrailBlazer turned into a separate model. Production of the Blazer overlapped with the TrailBlazer until 2005, when the 2-door was sold at dealers while the 4-door was fleet only (until the 2004 model year).
Chevrolet discontinues the four-door Blazer in 2005 and now only offers the two-door version. The option groups are revamped to give dedicated Blazer owners what they want most, in addition to giving them a lower price. Another 2005 addition is the cigarette package, which includes an ashtray and lighter.