One problem related to brake grinding noise has been reported for the 1998 Chevrolet Monte Carlo. The most recently reported issues are listed below.
Hard pedal with brake fade when stopping from highway speeds - due to warped rotors. Since dealer turned rotors, brakes make klunking, clicking grinding noise during low speed application, but squealing noise at highway speeds with no application. Abs activates prematurely over the slight bumps and won't return control to driver, but no error lamp. Service manager advised gm feels this is normal operation.