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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Engine Control System - Self-Diagnostics) >> Self-Diagnostic System >> Retrieving Diagnostic Trouble Codes
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Retrieving Diagnostic Trouble Codes

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

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 Fig 1. The DLC is located under the instrument panel to the left of the steering column. The DLC is used to connect to a scan tool. Some common uses of the scan tool are identifying stored DTCs, clearing the DTCs, performing output control tests and reading the serial data. Follow the instructions supplied by the scan tool manufacturer to read DTCs accurately. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS .

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