I HAVE A 2007 GMC YUKON XL WITH A PEGGED OUT OIL PRESSURE GAGE...I KNOW THE OIL PRESSURE SENDING UNIT IS PROBABLY IN A CLOSED SHORT....BUT WHERE ON THE MOTOR IS THE SENDING UNIT??????
GOT A PICTURE??? HOW DO YOU GET THE "VORTEC" TOP ENGINE PLASTIC OFF WITH OUT PULLING THE ENGINE?????GOT A PICTURE???
HOW DO YOU GET THE "VORTEC" TOP ENGINE PLASTIC OFF WITH OUT PULLING THE ENGINE?????
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Try unplugging it and see if the gauge drops to zero. If it does than replacing the oil pressure sending unit will most likely fix your problem.
It is not easy to see or get at but you can find it on the back side of the engine on the drivers side, kind of in between the valve cover and the intake plenum
Could be the Oil Pressure Sending Unit. I do recall GMC having issues with the instrument cluster on 2003's. Try slapping the dash when the gage reads zero.
Probably just the oil sending unit internally defective.Just have them install a pressure tester and make sure the pressure is good.I`m sure this will be the sending unit.Hope this helps.Good luck.
Problem may be with the level sending unit, which is part of the fuel pump assembly in the fuel tank. You can check this with a good code reader that will give you live data from this unit and compare it with what the gauge is saying. If they don't match, you can try a good quality fuel system cleaner to see if that solves the problem. If they do match, then the problem is probably still in your instrument panel (IP) or engine computer.
Well first the GM oil pressure sending units are notorious for false readings, so what you must do is remove the oil pressure sending unit and plug in a test mechanical gage to verify the engine has acceptable oil pressure, after you are certain the pressure is ok replace the sending unit, it requires a special socket to remove it, the socket is about $5.00 USD. There is a deep socket and a shallow, so check the sending unit for the correct socket fit.
it is probably the oil sending unit if you have access to a direct reading oil pressure gauge put it on and if oil pressure is reading normal replace sender
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