What is the horsepower in a 4.3 liter Chevy s10 pickup motor?

The horsepower of a 4.3L Chevy S10 engine varies depending on the year of manufacture and the specific engine configuration (e.g., whether it's a TBI, Vortec, etc.). There's no single horsepower number. You'll need to specify the year of your S10 to get a more accurate answer. However, generally, expect to see horsepower ratings ranging from roughly 160 to 190 hp.