My engine seized on me, its a 94 sonoma 4.3L. Was running down the road, check gauges light came on, no oil pressure and before I could stop it, she died. There was no noise or fluids from it, it was

Oil light is rather important it goes out if oil pressure is good comes on if oil pressure is low when it comes on damage is expected with continued operation like wearing of main bearings and pistons and cylinders can lead to a engine rebuild

Flashing oil light indicates a loss of oil pressure. No oil pressure will cause the engine to seize up. Check the oil level, if full verify that the oil sending unit is connected correctly. Listen for unusual engine noise (Shut down immediately to avoid damage to the engine), connect an oil pressure gauge to the oil sending port (remove sending unit) and verify oil pressure. the issue could be a loose connection, broken connection or plugged sending unit, as well as loss of oil pressure.

Sounds like your oil pump may have seized.You'll need a gauge to verify this. The engine has a mechanism by which it automatically cut the engine off if there's a sudden drop in pressure. I would replace the pump. If you do make sure you prime it prior to tightening the oil pan down. A big question is why you were that low on oil. Good luck!

you probably have your finger on the problem. have oil pressure test .when engine hot minimum 12psi.and change the thermostat.Don't cost much

Both issues could be normal to a degree. The engine temp would go up some when the truck stops moving, and the oil pressure would go down some when the engine returns to idle.
Are the two gauges reading out of normal range ?

Low oil pressure is a serious problem and should be checked right away. Either the oil pressure sending unit is sending the wrong pressure, or the oil pressure is too low due to an engine problem. A shop will be able to verify the actual oil pressure with a mechanical gauge. If the pressure is really okay, they can then change the sender or look for a faulty oil pressure gauge. If the pressure is really low, meaning that the sender was correct, the cause for the low pressure must be dealt with before expensive engine damage occurs.

Possible causes for low oil pressure include: wrong grade or weight of oil used, clogged oil filter, clogged oil pick-up strainer, engine running too hot, oil pump worn or damaged, idle speed too low, and oil pressure gauge working improperly.

It is doubtful that the oil pressure and the speaker problems are related. Engine controls and indicators and body accessories are generally on completely separate electrical circuits.

assuming you have no gauge, remove the oil pressure switch and run a line to an actual gauge. check against engine specs at idle and running down the road.

First you must find the engine oil pressure sensor, remove the sensor and repalce it with a gauge. Run the engine until hot and record the reading if the reading is between12 and 25 PSI replace the sensor, if the pressure continually drops as the engine warms up then you have a major issue, meaning there is serious engine wear and a rebuild is nesassary.

hook up a mechanical gauge and verify the pressure at idle is correct, I suspect the sending unit is defective

i would check the the oil pressure sensor is not foul up this can happen sometimes, as there is vain in the sensor. this reads the pressure. and tell the ecu. and your display.