Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
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The DTC will set when the BCM detects the ambient light sensor signal is below 0.196 V.
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The DTC will set when the BCM detects the ambient light sensor signal is above 4.9 V.