{"nhtsa_id":603613,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-02-26","date":"1998-10-01","document_id":"98054","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"SOME VEHICLES MAY DEVELOP A FAILURE OF THE CYLINDER HEAD GASKET LEADING TO EXTERNAL COOLANT LEAKS FROM THE CYLINDER HEAD GASKET TO ENGINE BLOCK JOINT. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/603613","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CAVALIER","year_from":1995,"year_to":1995,"match":"exact","vehicle_ids":["1995_chevrolet_cavalier"]},{"make":"PONTIAC","model":"SUNFIRE","year_from":1995,"year_to":1995,"match":null,"vehicle_ids":[]}],"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":[]}