One problem related to service brakes has been reported for the 1998 Oldsmobile Bravada. The most recently reported issues are listed below.
My vehicle had a complete loss of power while driving. It happened more than once prior to taking it in to the dealership. No dash board lighting, no power steering, no acceleration and braking was very difficult. If I tapped on the steering column the power would sometimes come back on. I do have the paperwork from 2001 when the ignition switch was replaced at the dealership. I believe the ignition problem goes back further that gm knows.