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Low oil pressure


Junior01991

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Posted

Hello and thanks in advance. I have a 2004 GMC Sierra 1500 5.3 with 157k. I just changed the knock sensors and harness and also the intake gasket. Now the oil pressure holds around 20 and when braking and it gets under 1200 rpm it drops and gets little to zero oil pressure and the alarm goes off. Not sure what direction I need to go to get this figured out. Any help is appreciated 

 

Posted
3 hours ago, silveradosid said:

replace the oil pressure sending unit and the screen filter under neith it

No screen on '04. Screen is for AFM engines.

 

OP maybe you banged up the pressure sensor while fiddling with the intake. All was fine prior to intake work?

Posted

Just be sure your oil pressure is actually in specification. You need to get a mechanical gauge on it and get reading at operating temperature. Get them at idle, 1000, 2000 and 3000 RPM’s. Post back


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