{"nhtsa_id":10004377,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-12-04","date":"2005-02-01","document_id":"030604041","mfr_campaign":null,"replaces":"030604041A","component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"POOR ENGINE PERFORMANCE - MISFIRE, ROUGH IDLE, SERVICE ENGINE SOON/CHECK ENGINE LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE (DTC) P0300 SET. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10004377","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P0300"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"ASTRO","year_from":2001,"year_to":2003,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"BLAZER","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_chevrolet_blazer","2002_chevrolet_blazer","2003_chevrolet_blazer"]},{"make":"CHEVROLET","model":"EXPRESS","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_chevrolet_express","2002_chevrolet_express","2003_chevrolet_express"]},{"make":"CHEVROLET","model":"S10","year_from":2001,"year_to":2003,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_chevrolet_silverado","2002_chevrolet_silverado","2003_chevrolet_silverado"]},{"make":"GMC","model":"JIMMY","year_from":2001,"year_to":2003,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SAFARI","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_gmc_safari","2002_gmc_safari","2003_gmc_safari"]},{"make":"GMC","model":"SAVANA","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_gmc_savana","2002_gmc_savana","2003_gmc_savana"]},{"make":"GMC","model":"SIERRA","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_gmc_sierra","2002_gmc_sierra","2003_gmc_sierra"]},{"make":"GMC","model":"SONOMA","year_from":2001,"year_to":2003,"match":"exact","vehicle_ids":["2001_gmc_sonoma","2002_gmc_sonoma","2003_gmc_sonoma"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":2001,"year_to":2001,"match":"exact","vehicle_ids":["2001_oldsmobile_bravada"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}