naveed Posted July 3, 2011 Share Posted July 3, 2011 can someone please tell me where is the On-Board Diagnostic plug in my 1991 Deville thanks Link to comment Share on other sites More sharing options...
farooqmasudi Posted July 4, 2011 Share Posted July 4, 2011 The Assembly Line Diagnostic Link (ALDL) Connector is located behind the center of Instrument Panel (I/P), below ashtray. Good Luck Link to comment Share on other sites More sharing options...
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