Chevrolet first used the "TrailBlazer" nameplate on the 1999 Blazer, to denote the upscale trim level of the aging midsize SUV. In 2002, Chevy applied the "TrailBlazer" name to an all-new model that took the place of four-door Blazer models, but two-door Blazer models continued on. The 2003 TrailBlazer had a pair of engines available: a base six-cylinder and an optional V-8.
Six-Cylinder Engine Output
The standard engine in the 2003 Chevrolet TrailBlazer was the Vortec 4200, in-line six-cylinder. This engine produced 275 horsepower at 6,000 rpm -- a five-horsepower bump from the 2002 model year -- and 275 foot-pounds of torque at 3,600 rpm.