How much horsepower does a Chevy 5.3 liter engine have?

The horsepower of a Chevy 5.3L engine varies significantly depending on the year of manufacture and the specific vehicle it's installed in. It's not a single number. Over the years, the 5.3L has been tuned differently for various applications, resulting in different power outputs. You'll need to specify the year and model of the vehicle to get a precise answer.