GM Service Manual Online
For 1990-2009 cars only

Use one of these two methods for clearing Diagnostic Trouble Codes (DTCs) in the instrument cluster memory:

    • The scan tool (Tech 2) method.
    • The ignition cycle default method.

These methods will not clear instrument cluster DTCs:

    •  Unplugging the instrument cluster electrical connector by removing the instrument cluster.
    • Disconnecting the battery cables.
    • Turning the ignition switch off (except on an ignition cycle default).

Important: Check for proper instrument cluster operation and the absence of DTCs after completing the clearing procedure.

Scan Tool Method

Refer to the scan tool (Tech 2) user's manual for menu navigation instructions.

Ignition Cycle Default

The instrument cluster clears a Diagnostic Trouble Code (DTC) automatically when the malfunction that set the DTC does not occur for 100 ignition cycles.