The relay might be located in:
* The underhood fuse box: This is the most common location.
* The passenger compartment fuse box (inside the vehicle): Less common, but possible on some models.
* A separate relay center: Some models may have a dedicated relay center, often near the battery.
Without knowing the year of your S10, it's impossible to give a precise answer. Using a search engine with "20XX Chevrolet S10 fuel pump relay location" (replace 20XX with your truck's year) will likely yield better results.
