Most 1991 sending units on a 1991 Le Sabre screw in. The exact location for the sending unit will depend on which one needs changing.
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.
Back of the engine, next to the distributor.
it's inside the fuel tank ,electric pump and sending unit!
the fuel pump and fuel level sending unit are combined and are in the gas tank
Do you mean the Temp sending unit, oil pressure sending unit, or fuel level sending unit?
location of oil level sending unit 6.6 disel
Yes, it can leak at the sending unit.
The fuel pump is inside the gas tank with the sending unit for your fuel gauge
The oil sending unit only provides a reading of the oil pressure to the gauge. It has nothing to do with actually sending oil.
well what kind of truck and what engine?
Assuming you are asking for the location of the fuel level sending unit, it's inside the fuel tank.