To be certain, you should:
* Consult your owner's manual: This is the most reliable source of information for your specific truck.
* Look at a repair manual: A Chilton's or Haynes repair manual for your year and model will have diagrams showing the fuel filter's location.
* Search online: Use a search engine like Google and include the specifics (e.g., "1994 Chevy 1500 fuel filter location 5.7L"). You may find photos or videos showing the location on a similar truck.
Important Safety Note: Working with fuel systems involves flammable materials. Always take necessary precautions, such as disconnecting the battery's negative terminal before working near the fuel system.