New filter and pump but no fuel through my injectors?

A buddy and I had tried to test my alternator
to see if it was getting weak it passed the
test but in putting it back on the wire that
charges the battery touched some metal
and art out. when the alternator was all the
way back installed the truck wouldn't start
due to no fuel going through the delivery
system I've replace the filter and the pump
and still no fuel comes through my
injectorsI'm not too familiar with all of the
sensors that go on the little 4.3 Vortec but
I'm told there are a few different ones that
would cause the same thing. could
someone maybe list a couple things I
should check and how I would do so that
would be awesome thanks for the time