How much horse power does a Chevy 5.3 have?

The horsepower of a Chevy 5.3L engine varies depending on the year and specific model of the vehicle it's in. It's not a single, fixed number. You'll need to specify the year and model to get an accurate horsepower rating. Over the years, the 5.3L has ranged from roughly 285 to 355 horsepower.