To be certain, it's best to:
* Consult your owner's manual: This is the most reliable source for your specific vehicle.
* Use a repair manual: A Haynes or Chilton repair manual for your year and model S10 will have diagrams and detailed instructions.
* Search online: Use a search engine like Google or Bing, searching for "2003 Chevy S10 fuel filter location" along with your engine type (e.g., "2003 Chevy S10 4.3L fuel filter location"). Many forums and websites contain pictures and descriptions from other S10 owners.
Remember safety first. When working near fuel lines, always disconnect the battery's negative terminal to prevent sparks. Fuel is flammable, so work in a well-ventilated area.