Using Scan Tool
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Trouble Codes (DTC) can also be retrieved using scan tool. Connect scan tool to Data Link Connector (DLC) located under driver's side of instrument panel. Turn ignition switch to ON position. Select appropriate module on scan tool display to retrieve current and history DTCs. After retrieving and recording current and history DTCs, see DIAGNOSTIC TROUBLE CODE INDEX table. Perform appropriate diagnostic and repair procedures as directed.