How much horsepower does a 2002 Chevy silverado z71 have?

The horsepower of a 2002 Chevy Silverado Z71 depends on the engine it came with. There were several engine options available that year. To know the exact horsepower, you'll need to know the engine size (e.g., 4.3L, 4.8L, 5.3L, 6.0L, or 8.1L). Each engine had a different horsepower rating.