Where is the fuel pump relayon a 1996 s10 4.3?

The fuel pump relay location on a 1996 S10 with a 4.3L engine is in the underhood fuse/relay center. However, there isn't one single universally agreed upon location within that center. You'll need to consult your owner's manual or a wiring diagram specific to your truck's year and engine.

The owner's manual will have a diagram of the fuse and relay box showing which position corresponds to the fuel pump relay. A wiring diagram will show the relay's function and may offer alternative ways to diagnose the issue.

Without the manual or diagram, you'll have to check each relay carefully by comparing it to descriptions online (including pictures) or by using a multimeter to test each relay and find the one that controls the fuel pump circuit. Always disconnect the negative battery terminal before working with relays or fuses.