The fuel line is located on the drivers side on the top of the frame.
Two fuel lines, one supply and one return. The third line is a vent line.
There is no fuel pump reset button in that vehicle.
I just had to patch a cut fuel line on my 93 S10 4.3l V6 and used 3/8" compression fittings, so I would say 3/8" steel line.
With the engine running, remove the fuse or the relay for the fuel pump. The engine will stall soon and the fuel line won't have any pressure left.
the fuel filter is an in-line filter next to the frame under the driver side
Possibly a kinked, broken, or disconected fuel line.
just one, on the fuel line coming out of the tank under the cab of the truck
fuel filter is on drivers side on the line against the frame.
It doesn't have or need a line connected to it. The spider is inside the vacuum chamber.
While engine is running remove the fuel pump fuse. Engine will run out of fuel when pressure drops.
The S10's were notorious for having fuel line leaks under the plenim. Either the fuel line nut kit or the FPR fuel pressure regulator. That would be the first area to check. The side of the plenim that is clean, will be the side that is leaking. Of course it could be a sensor such as an EGR or IAC, but our S10's have the common problem of fuel leaking internally making them run rich and poorly, using too much fuel.