{"nhtsa_id":10003652,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2003-10-28","date":"2003-05-19","document_id":"051903","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"2003 MODEL YEAR CK TRUCKS AND G-VANS WITH GREATER THAN 8600 GVW AND MANUAL HVAC CONTROLS MAY SET A DIAGNOSTIC TROUBLE CODE C0550 AND TURN ON THE ANTI-LOCK BRAKE SYSTEM (ABS) TELLTALE LAMP ON THE INSTRUMENT PANEL. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10003652","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["C0550"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CHEVROLET","year_from":2003,"year_to":2003,"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":[]}