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Diagnostic Fault Information

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Instrument Panel Dimmer Switch B+ B257B 03, B1405 03, B1529 03, B3623 08 B257B 03, B3623 08 - -
Instrument Panel Dimmer Switch Signal B257B 03 B257B 03 B257B 07 -
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