GM Service Manual Online
For 1990-2009 cars only

Use the following procedure in order to clear DTCs stored in PBCM memory.

  1. Turn ON the ignition.
  2. Remove the PARK BRAKE circuit breaker.
  3. Wait 5 seconds.
  4. Reinstall the PARK BRAKE circuit breaker.
  5. Use a flat blade screwdriver in order to short together the 2 terminals located in the diagnostic port of the PBCM.
  6. Observe the diagnostic display on the side of the PBCM, ensuring "00" is displayed. A "00" display indicates that all DTCs have been successfully cleared.