{"nhtsa_id":10011129,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2005-01-03","date":"2004-01-01","document_id":"040605001","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"SERVICE ENGINE SOON (SES) LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE P0420 SET. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10011129","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P0420"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"S10","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SONOMA","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_gmc_sonoma"]}],"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":[]}