* Under the hood in the fuse box: This is the most common location. The fuse box is typically located near the battery. The relay itself might be labeled, or you might need to consult your owner's manual or a wiring diagram to identify it. Look for a box with multiple relays and fuses.
* Inside the passenger compartment fuse box (rare): Less common, but some S10 models might have the fuel pump relay located inside the passenger compartment fuse box, usually under the dashboard.
To be certain:
1. Consult your owner's manual: This is the best resource. It will have a diagram of the fuse box(es) and clearly identify the fuel pump relay.
2. Use a wiring diagram: A wiring diagram specific to your year and model S10 will show you exactly where the relay is located and its associated circuits. You can find these online (often for a fee) or at an auto parts store.
3. Check online forums: Search for "1999 Chevy S10 fuel pump relay location" on forums like ChevyTalk or S10forum. Other owners may have posted pictures or descriptions of their location.
Without your owner's manual or a wiring diagram, it's difficult to give a precise location. Always be careful when working around electrical components.
