Using Scan Tool
WARNING: This page is about a different car, the 2003 Buick Regal, 2003 Buick Century, 2002 Buick Regal, and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
DTCs are retrieved using a Tech 2(R) scan tool or other OBD-II compatible scan tool connected to OBD-II 16-pin Data Link Connector (DLC). DLC is located below left side of dash. If no DTC's exist, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS.