{"vehicle":{"id":"1999_gmc_sierra","year":1999,"make":"GMC","model":"Sierra"},"code":"P0300","generic":true,"description":null,"bulletins":{"as_of":"2026-10-19","count":7,"bulletins":[{"nhtsa_id":10112697,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-15","date":"2012-12-27","document_id":"PIP4138L","mfr_campaign":null,"component":"EQUIPMENT:MECHANICAL; POWER TRAIN","summary":"This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2012/MC-10112697-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2012/MC-10112697-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10112697"},{"nhtsa_id":10010375,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-11-17","date":null,"document_id":"3081","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","summary":"SERVICE ENGINE SOON LIGHT AND P0300 WHEN TOWING, CRUISING UPHILL OR ON HARD ACCELERATION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10010375"},{"nhtsa_id":10010364,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-11-17","date":null,"document_id":"3056","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","summary":"CHECK ENGINE LIGHT WITH A P0300 DUE TO 2-4 CYLINDERS MISFIRING ON THE SAME BANK OF THE ENGINE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10010364"},{"nhtsa_id":10009666,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-10-14","date":"2004-01-01","document_id":"3055","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","summary":"SERVICE ENGINE SOON LIGHT WITH A P0300 MISFIRE DUE TO MISFIRES MAINLY ON CYLINDER 7. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10009666"},{"nhtsa_id":10005439,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-02-27","date":"2004-01-01","document_id":"00149D","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"MALFUNCTION INDICATOR LAMP ON WITH A P0300 SET AND A MISFIRE. VARIOUS MODELS INCLUDING 1996 - 1999 P32 MODELS. SIT BULLETIN 1416475. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10005439"},{"nhtsa_id":10004223,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-11-22","date":"2003-11-18","document_id":"00149C","mfr_campaign":null,"component":"ELECTRICAL SYSTEM","summary":"MALFUNCTION INDICATOR LAMP ON WITH A P0300 SET AND A MISFIRE. VARIOUS MODELS INCLUDING THE 1996-1999 P32 AND THE 1996-2002 GMC C/K TRUCK. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10004223"},{"nhtsa_id":614354,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-10-11","date":"2000-06-01","document_id":"000604024","mfr_campaign":null,"component":"UNKNOWN OR OTHER","summary":"SOME DRIVERS MAY COMMENT ABOUT THE SERVICE ENGINE SOON LAMP ILLUMINATING. THE POWERTRAIN CONTROL MODULE MAY HAVE STORED A DIAGNOSTIC TROUBLE CODE P0300, ENGINE MISFIRE DETECTED. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/614354"}],"url":"https://open.wenmarpro.com/makes/gmc/sierra/1999/bulletins?code=P0300"},"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/gmc/sierra/1999/codes/P0300","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."]}