GM Service Manual Online
For 1990-2009 cars only

The scan tool, when plugged into the Data Link Connector (DLC), becomes part of the vehicle's electronic system. The scan tool can perform the following functions:

    • Display MAGNASTEER data.
    • Display and clear MAGNASTEER Diagnostic Trouble Codes (DTCs).
    • Control MAGNASTEER components.
    • Perform extensive MAGNASTEER diagnosis.
    • Provide diagnostic testing for intermittent MAGNASTEER conditions.

Each test mode has specific diagnostic capabilities which depend upon various keystrokes. The keys on the scan tool select operating modes, perform functions within an operating mode, or enter DTC or model year designations. For more scan tool diagnostic information, refer to the scan tool user's manual.