{"nhtsa_id":51302,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-06-27","date":"1997-03-01","document_id":"776001","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"KNOCK, RATTLE OR TAP NOISE FROM THE ENGINE BEFORE THE ENGINE HAS REACHED OPERATING TEMPERATURE OR UNDER LIGHT LOAD CONDITIONS AT OPERATING TEMPERATURE KNOCK, RATTLE OR TAP NOISE FROM THE ENGINE BEFORE THE ENGINE HAS REACHED OPERATING TEMPERATURE OR UNDER LIGHT LOAD CONDITIONS AT RATURE (REPLACE PISTON AND/OR ROD ASSEMBLIES). *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/51302","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BUICK","model":"CENTURY","year_from":1994,"year_to":1996,"match":"exact","vehicle_ids":["1994_buick_century","1995_buick_century","1996_buick_century"]},{"make":"CHEVROLET","model":"BERETTA","year_from":1994,"year_to":1996,"match":"exact","vehicle_ids":["1994_chevrolet_beretta","1995_chevrolet_beretta","1996_chevrolet_beretta"]},{"make":"CHEVROLET","model":"CAVALIER","year_from":1994,"year_to":1997,"match":"exact","vehicle_ids":["1994_chevrolet_cavalier","1995_chevrolet_cavalier","1996_chevrolet_cavalier","1997_chevrolet_cavalier"]},{"make":"CHEVROLET","model":"CORSICA","year_from":1994,"year_to":1996,"match":"exact","vehicle_ids":["1994_chevrolet_corsica","1995_chevrolet_corsica","1996_chevrolet_corsica"]},{"make":"CHEVROLET","model":"S10","year_from":1994,"year_to":1997,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SONOMA","year_from":1994,"year_to":1997,"match":"exact","vehicle_ids":["1994_gmc_sonoma","1995_gmc_sonoma","1996_gmc_sonoma","1997_gmc_sonoma"]},{"make":"OLDSMOBILE","model":"CIERA","year_from":1994,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"PONTIAC","model":"SUNFIRE","year_from":1995,"year_to":1995,"match":null,"vehicle_ids":[]},{"make":"PONTIAC","model":"SUNFIRE","year_from":1996,"year_to":1996,"match":"exact","vehicle_ids":["1996_pontiac_sunfire"]}],"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":[]}