well what kind of truck and what engine?
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.
The oil sending unit is located on the top of the turbo on the 94 turbo diesel 7.3
above oil filter.
HUH???????????????????????????
The oill sending unit is almost always on the back of the motor by the fire wall.
With a 4.3L engine, the oil pressure sending unit is in the back of the engine just to the drivers side of the distributor.
call a professional
its located at the front of the engine just under the alternator
It is right behind the distributor, It is hard to get to.
On top of the oil filter housing
Oil sending unit is by the left side of the distibutor cap if you are faceing the truck you will have to take a light and look down beside the cap but you will be able to see it