System: brakes; hydraulic; power assist; booster. Vehicle description: passenger vehicles. Owner notification: owner notification IS expected to begin in july 1996. Note: owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact chevrolet at 1-800-222-1020. Also contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.