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Re: 2002 astro van 4.3 x code p1637 Whats the deal?
Posted to Technical Discussion Forum on 3/14/2007

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OK, dig out your scan tool - in the PCM data list, what is the IGN 1 VOLTAGE? In the BCM data list, what is the BATTERY VOLTAGE and the IGNITION POWER MODE? In the IPC data list, what is the BATTERY V... Login to read more.