GM Service Manual Online
For 1990-2009 cars only

A DTC may be cleared from the memory of the electronic climate control (ECC) module by performing one of the following procedures:

    • Disconnect the battery.
    • Disconnect the electronic climate control module electrical connector.
    • Use the scan tool.
    • Create 100 concurrent ignition cycles without the fault reoccurring.

Clearing DTC(s) from the electronic climate control module memory is necessary after a repair or to test if a malfunction will occur again. If the fault still exists the DTC will re-set after clearing the DTC(s).