Yes, it can leak at the sending unit.
The oil sending unit only provides a reading of the oil pressure to the gauge. It has nothing to do with actually sending oil.
Yes,if the sending unit is the source of the leak.
well what kind of truck and what engine?
Yes it can
The 3 top areas on this model are: valve cover gaskets, oil sending unit,oil cooler lines.
It developed an leak and then for whatever reason sealed itself. Replace the oil pressure sending unit.
Yes, and when it does it must be replaced as it is defective.
The oill sending unit is almost always on the back of the motor by the fire wall.
All oil senders can leak. Make and model makes no difference.
Ground the wire that goes to the temperature sending unit and if the gauge goes up then the sending unit is defective.
Usually the sending unit (on the pump, in the tank) has failed.Usually the sending unit (on the pump, in the tank) has failed.
Most likely cause is a failed sending unit in the tank.