{"nhtsa_id":6089154,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-01-14","date":"1999-10-01","document_id":"990601020","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"SOME CUSTOMERS MAY COMMENT ABOUT A KNOCKING OR GRINDING NOISE WITH THE ENGINE RUNNING. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/6089154","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"S SERIES","year_from":1998,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"T SERIES","year_from":1998,"year_to":1999,"match":"exact","vehicle_ids":["1998_chevrolet_t-series","1999_chevrolet_t-series"]},{"make":"GMC","model":"S SERIES","year_from":1998,"year_to":1999,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"T SERIES","year_from":1998,"year_to":1999,"match":"exact","vehicle_ids":["1998_gmc_t-series","1999_gmc_t-series"]}],"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":[]}