oil light going on and off.

That’s really scary especially on an Impala, install an analog gauge for the oil pressure and drive it so you can see what the actual oil pressure is. If the gauge shows oil pressure drop then you either have an oil pump going out or engine bearings are worn. If the oil pressure stays up then the oil pressure sender is most likely the problem.

Answer not posting

Replace the oil pressure sending unit

.I suspected it being the oil sending unit but needed to make sure of the possibilities of it being anything other then the oil sending unit because of the light going off and on and not staying on permanently so I can pick up the code with my tester to make sure. Thank You GA and beatupchevy for your answers.

Had this problem, the oil filter housing gasket had a leak and would cause oil pressure Senor to go bad everytime I solely fix that. I would advise to make sure that the filter isn’t leaking, if not just change the oil pressure sensor