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Home >> GMC >> 2002 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel, Gauges & Console >> Diagnostic Information & Procedures >> DTC B1023: Switch Signal Circuit Is Low >> Circuit Description

Circuit Description

The DIC monitors the DIC internal switch signal circuits in order to perform various functions. The DIC detects a signal activation when the signal circuit is low.

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