{"vehicle":{"id":"2020_chevrolet_express","year":2020,"make":"Chevrolet","model":"Express"},"code":"P0521","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":10178334,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2020-08-10","date":"2020-06-17","document_id":"PIP5630D","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING","summary":"This Preliminary information communicates A vehicle may have a concern of no oil pressure and/or P0521 set. the releif valve in the pump is sticking or the number 1 main bearing is damaged. Drop oil pan and confirm #1 main is spun or not. If bearings are OK Then change oil pump.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10178334-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2020/MC-10178334-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10178334"}],"url":"https://open.wenmarpro.com/makes/chevrolet/express/2020/bulletins?code=P0521"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/chevrolet/express/2020/codes/P0521","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}