The stock horsepower of a 5.3L Chevy Silverado varies depending on the year and specific model. There's no single answer. You'll need to specify the year of the truck to get an accurate answer. Even within a single year, different trim levels might have slightly different outputs.
To find the exact horsepower for your specific truck, check your owner's manual or look up the specifications for your year and model on a website like Edmunds, Kelley Blue Book, or the official Chevrolet website.
