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Re: 1995 K2500 code 56 won't go away
Posted to HD/Fleet Forum on 10/30/2003 1 Reply

Hi Bob. When the Fuel Solenoid Driver (FSD) module was replaced, the calibration resistor was probably not transferred from the connector cavity of the old FSD to the replacement. If that's the case and the original is gone, try a #5 resistor.

The PCM isn't ... Login to read more.

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