350 3/4 ton starter issue

I have a 93' 3/4 ton Silverado 4x4 with 182k miles on it, that won't
start, won't even turn-over.  Its a 350 engine with standard trans.
Put a new starter in 6 months ago so I don't think that is the issue.
All dash lights come on when I turn on the key, horn and radio are
working find.  Charged the battery overnight have 100% charge and
still have the same same issue.  Checked all the connections, seem
tight.  I did see one post on this group that said check the switch
under the clutch and adjust it if needed.  The truck has been acting
up a bit, won't do anything but click when I hit the ignition until I
pump the clutch and ****ft it through a couple of gears.  I think the
switch under the clutch would be the next place to look but the truck
is broke down over at a friends house so I thought I would pose this
question here hoping for any other trouble shooting thoughts.  Any
ideas?