{"nhtsa_id":601868,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1998-08-28","date":"1998-04-01","document_id":"97061A","mfr_campaign":null,"replaces":"97061","component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"EXHIBITING 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/601868","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"W4","year_from":1995,"year_to":1997,"match":"exact","vehicle_ids":["1995_chevrolet_w4","1996_chevrolet_w4","1997_chevrolet_w4"]},{"make":"GMC","model":"W4","year_from":1995,"year_to":1997,"match":"exact","vehicle_ids":["1995_gmc_w4","1996_gmc_w4","1997_gmc_w4"]}],"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":[]}