{"nhtsa_id":53653,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-03-30","date":"1997-11-01","document_id":"97110197061A","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"VEHICLES EQUIPPED WITH DIESEL ENGINES MAY EXHIBIT A CONDITION IN WHICH THE CLOSED SYSTEM DESIGN OF THE CURRENT PCV SYSTEM MAY ALLOW ENGINE OIL TO ENTER THE INTAKE SYSTEM. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/53653","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CHEVROLET","year_from":1995,"year_to":1997,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"GMC","year_from":1995,"year_to":1997,"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":[]}