How to fix PO521 Error Code?

Asked by Curtis Apr 29, 2021 at 02:09 PM about the 2011 Chevrolet Silverado 1500 LT Crew Cab 4WD

Question type: Maintenance & Repair

If Ip replaced oil pressure sensor, screen and oil
pump why do i still have a PO521 Error Code?

1 Answer

RusseyG answered 3 years ago

Having the same issue in a 2013 Silverado 1500 5.3l after replacing oil pump, sending unit, and screen. Let me know if you find a fix.

Mark helpful

Your Answer:

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