What is the horse power in a stock 1991 Chevy C1500?

The horsepower of a stock 1991 Chevy C1500 varied depending on the engine. There wasn't a single horsepower figure. The most common engines and their approximate horsepower ratings were:

* 4.3L V6: Around 160 hp

* 5.0L V8: Around 170 hp

* 5.7L V8: Around 230 hp

To know the exact horsepower for a specific 1991 C1500, you'd need to check the vehicle's documentation or the engine's specifications.