{"nhtsa_id":618180,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-04-06","date":"2001-01-19","document_id":"190101","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP","mfr_system":null,"summary":"SUBJECT REGARDING A GEL LIKE SUBSTANCE FOUND IN THE MASTER CYLINDER ON 1997 THROUGH 2001 MEDIUM DUTY TRUCKS EQUIPPED WITH ABS BENDIX BRAKE SYSTEMS. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/618180","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"abs","name":"Anti-lock brakes","parent":"brakes"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"CHEVROLET TRUCK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"GMC TRUCK","year_from":null,"year_to":null,"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":[]}