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U1000 Diagnostic Trouble Code Discussion for June 2006

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2003 Chevrolet Malibu LS 3.1L No Start VIN: 1G1NE52J13
U1000: Class 2 Communication Malfunction. ... injector pulse. The security light was on when it cam in and we replaced the ignition switch and lock cylinder. After relearn, now the security light is out but we still don't have injector pulse and we still have a code U1000. The code seems to be coming ...
June 05, 2006