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How much horsepower does a stock 2003 Chevy Trailblazer have?

The 2003 Chevy Trailblazer came with a few different engine options, so the horsepower varies:

* 4.2L Inline 6-cylinder: This engine produced approximately 275 horsepower.

* 5.3L V8: This engine produced approximately 290 horsepower.

To know the exact horsepower of a specific 2003 Trailblazer, you'd need to check the vehicle's documentation or the sticker on the driver's side doorjamb (which usually lists engine details).