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Retrieving Diagnostic Trouble Codes

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DTCs are retrieved using a Tech 2 scan tool, or other OBD-II compatible scan tool connected to OBD-II 16-pin Data Link Connector (DLC). See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS . See Fig 1. DLC is located below left side of dash.

Fig 1: Identifying OBD-II Data Link Connector (DLC)
G96D09865Courtesy of GENERAL MOTORS CORP.
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