{"nhtsa_id":637257,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-11-22","date":"2002-06-21","document_id":"210602","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"ON SOME VEHICLES WITH THE COMPRESSED NATURAL GAS OPTION, THE POTENTIAL EXISTS FOR THE ENGINE HARNESS TO MAKE CONTACT WITH THE COOLING FAN, OVER TIME THIS CONTACT MAY LEAD TO VARIOUS CODES AND SERVICE ENGINE SOON LAMP ACTIVATION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/637257","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CAVALIER","year_from":null,"year_to":null,"match":"exact","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":[]}