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2002
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Sierra 1500 HD, RWD
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DTC B1023: Switch Signal Circuit Is Low
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Conditions for Clearing the DTC
Conditions for Clearing the DTC
The DTC becomes history when the fault is no longer present.
A history DTC cleans after 100 malfunction free ignition cycles.
The DIC receives a clear code command from the scan tool.
Fig 1: DTC B1023 Diagnosis
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.