{"nhtsa_id":10001867,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-07-23","date":"2003-03-25","document_id":"032503","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"ANTI-LOCK BRAKE SYSTEM (ABS) TELLTALE LIGHT BEING CONSTANTLY ILLUMINATED WITH A DIAGNOSTIC TROUBLE CODE C0550 BEING STORED. *TT *JB","document":null,"url":"https://open.wenmarpro.com/bulletins/10001867","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["C0550"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":2003,"year_to":2003,"match":"exact","vehicle_ids":["2003_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA","year_from":2003,"year_to":2003,"match":"exact","vehicle_ids":["2003_gmc_sierra"]}],"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":[]}