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Code P0521. Changes the oil pressure switch with an

original. Still getting the same...
Code P0521. Changes the oil pressure switch with an original. Still getting the same code
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Answered in 6 minutes by:
3/28/2018
Ron
Ron, ASE Certified Technician
Category: Chevy
Satisfied Customers: 37,765
Experience: 35 years experience with ASE Certs
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Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

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Alan,

Gm has released a service bulletin dealing with the fault code P0521 that you are getting that deals with cleaning the baffle in the left valve cover and installing a new upgraded GM oil filter. I have enclosed the bulletin in the link below for your review as it very likely applies to the problem you are having.

https://www.dropbox.com/s/yolt4tbzvvbolty/oil%20pressure%20Mar%2028.pdf?dl=0

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Customer reply replied 24 days ago
God bless GM. Thank you I will get back to you

Your very welcome and thank you as well.

Ron
Ron, ASE Certified Technician
Category: Chevy
Satisfied Customers: 37,765
Experience: 35 years experience with ASE Certs
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Ron and 87 other Chevy Specialists are ready to help you
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Customer reply replied 23 days ago
Back to square one. I have done everything prescribed and after a day its the same. Oil pump?

That is possible, have you installed a manual gauge and read the actual oil pressure to see if it's dropping?

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Customer reply replied 23 days ago
Fluctuates between 5.2 to 7.9 at idle. When driving 22

Your presssure reading are on the low side. the factory specs call for

24 psi at 1,000 engine RPM

35 psi at 2,000 engine RPM

38 psi at 3,000 engine RPM

I would suspect that you have something going on with the oil pump and or the pickup tube.

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Customer reply replied 23 days ago
I thought so thanks

You're very welcome.

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Customer reply replied 23 days ago
My last question is if oil pump, and I think it is, should I go with standard or high volume pump. The car has 88,000 miles always used Mobile 1

You would be fine with either one, it's your call.

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