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Retrieving Diagnostic Trouble Codes

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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 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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