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Data Link Connector (DLC) Schematics

WARNING: This page is about a different car, the 2005 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, Data Link Connector, and SP205
GM1463234Courtesy of GENERAL MOTORS CORP.
Fig 2: SP206 and SP207
GM1463235Courtesy of GENERAL MOTORS CORP.