To be certain, you should:
* Consult your owner's manual: This is the best resource for the exact location.
* Check online repair manuals: Sites like Chilton or Haynes provide detailed diagrams and instructions specific to your year and model. Search for "[Year] Chevrolet S10 fuel filter replacement."
* Look under the truck: Start near the fuel tank and follow the fuel lines. The filter is often a cylindrical canister with fuel lines entering and exiting.
Important Note: Be aware that working with fuel lines and the fuel system can be dangerous. If you're not comfortable working on your vehicle yourself, take it to a qualified mechanic.