GM Service Manual Online
For 1990-2009 cars only

Disconnecting the battery or module connector will not clear a UTD DTC. A DTC can only be cleared in one of the following three ways:

    • Using the IPC Clearing feature.
    • Using a scan tool.
    • A system may also automatically clear a DTC if the malfunction has not occurred within certain number of ignition cycles. Refer to the appropriate system diagnosis for specific clearing DTC features.

Most all information in diagnostic tables will refer to the scan tool for diagnostic support. For details on using the on-board diagnostic feature to access and/or clear DTCs. Refer to On-Board Diagnostics in Instrument Panel, Gauges and Console.

Clear any history DTC after a system malfunction is corrected in order to prevent future misdiagnosis.