{"nhtsa_id":601892,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-28","date":"1998-06-01","document_id":"98022","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"VEHICLES EQUIPPED WITH 5.7L (LS1) ENGINES MAY HAVE AN EXHAUST GAS LEAK BETWEEN THE SPARK PLUG(S) AND THE CYLINGER HEAD. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/601892","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CAMARO","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_chevrolet_camaro"]},{"make":"CHEVROLET","model":"CORVETTE","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_chevrolet_corvette"]},{"make":"PONTIAC","model":"FIREBIRD","year_from":1998,"year_to":1998,"match":"exact","vehicle_ids":["1998_pontiac_firebird"]}],"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":[]}