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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
Vacuum Pump Relay B+ - - - -
Vacuum Pump Relay Control C027B 00 C027B 00 C027B 00 -
Vacuum Pump Relay Ground - - - -
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