How much horepower and torque did a stock 2003 Chevy 5.3L engine put out?
The stock 2003 Chevy 5.3L engine, depending on the specific application (truck, SUV, etc.), produced between 285 and 300 horsepower and between 325 and 335 lb-ft of torque. There wasn't a single, universal output across all vehicles using that engine. You'll need to specify the exact vehicle model to get the precise figures.
