{"nhtsa_id":634223,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-09-28","date":"2002-08-01","document_id":"02035","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:DIESEL","mfr_system":null,"summary":"CUSTOMER SATISFACTION PROGRAM REGARDING ENGINE OIL CONTAMINATION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/634223","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":2003,"year_to":2003,"match":"exact","vehicle_ids":["2003_chevrolet_silverado"]}],"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":[]}