The Chevrolet TrailBlazer is a mid-size sport utility vehicle that has been produced by Chevrolet since 2000. The TrailBlazer nameplate was introduced in 1999 as an upscale trim line of the Blazer. 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). Remote keyless entry is an available option on all models of the Chevrolet Trailblazer.