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Re: 2004 Cadillac CTS - Used PCM
Posted to Technical Discussion Forum on 12/4/2011 4 Replies

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We cannot communicate with the first (customer supplied) ECM. When it is installed, we cannot communicate with it, or gather data to perform a reflash. When we request data, we get an error message. ... Login to read more.

4 Replies Received (View Replies)