Under the hood, on the firewall, far to the drivers side. If you have ac there may be two relays there, the other one is for the ac compressor.
Need to know what year S10.
fuel pump relay
The fuel pump relay on a 1995 Chevrolet S10 pickup is located underneath the hood. The fuel relay will be inside the fuse box.
Need to know what year S10 you have to tell you where the fuel pump relay is.
In the fuse/relay center under the hood.
There is no fuel pump relay on a 85 s10 because it is carberated.
The fuel pump is fused and also has a relay either could be your problem, also check along the frame for brocken wires.
That other relay should be the AC compressor relay.
The 99 Chevy S10 does not have a fuel pump reset button. The pump is controlled by the relay unit.
1995 to 1998 S10 fuel pump relay is located in the glove compartment behind the door marked "relays". It is the first relay on the left.
In the under hood fuse and relay center.
Under the hood in the fuse/relay center.