GM Service Manual Online
For 1990-2009 cars only

Plug the scan tool into the Data Link Connector (DLC). The scan tool becomes part of the vehicle's electronic system. The scan tool performs the following functions:

    • Display ABS/TCS data
    • Display diagnostic trouble codes
    • Clear ABS/TCS diagnostic trouble codes
    • Control ABS/TCS components
    • Perform extensiveABS/TCS diagnosis
    • Provide diagnostic testing for intermittent ABS/TCS conditions
        Each test mode has specific diagnostic capabilities which depend upon various keystrokes.
        The keys on the scan tool perform the following functions:
       - Select operating modes
       - Perform functions within an operating mode
       - Enter DTC designations
       - Enter model year designations

Refer to Enhanced Diagnostics for more scan tool diagnostic information.