GM Service Manual Online
For 1990-2009 cars only

The Enhanced DTC functions (under the Diagnostic Trouble Code (DTC) menu of the scan tool) is designed to provide the service technician with specific malfunction occurrence information for the very last DTCs stored. The following SNAP SHOT data is stored to identify the last DTC set:

    • Wheel speed data
    • The ABS status
    • The stoplamp switch status