{"nhtsa_id":623509,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-10-29","date":"2001-06-29","document_id":"01005","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, HYDRAULIC:POWER ASSIST","mfr_system":null,"summary":"SOME VEHICLES EQUIPPED WITH VACUUM POWER BRAKE ASSIST AND EBC4 ABS BRAKE MODULES MAY COMMENT THAT THEIR VEHICLES EXHIBIT POOR BRAKE SYSTEM PERFORMANCE, THIS MAY BE ATTRIBUTED TO BRAKE PEDAL FEEL. *SLC","document":null,"url":"https://open.wenmarpro.com/bulletins/623509","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SUBURBAN","year_from":1992,"year_to":1994,"match":"exact","vehicle_ids":["1992_chevrolet_suburban","1993_chevrolet_suburban","1994_chevrolet_suburban"]},{"make":"GMC","model":"SUBURBAN","year_from":1992,"year_to":1994,"match":"exact","vehicle_ids":["1992_gmc_suburban","1993_gmc_suburban","1994_gmc_suburban"]}],"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":[]}