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GM C3 question..is Diagnostic Mode hardwired in ECM?
Posted to Technical Discussion Forum on 5/16/2003 13 Replies

Hello All,

I've got this problem car which I've posted to Techmail,

[...]

but one of the symptoms has me really curious.

My problem child has NO activity on the M/C solenoid (I mean zero..nothing) unless you go into Diag Mode and then the M/C solenoid ... Login to read more.

13 Replies Received (View Replies)