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Home >> Chevrolet >> 2020 >> Impala Premier >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Diagnostic Information and Procedures >> DTC C027B >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Vacuum Pump Relay B+ 1 1 - -
Vacuum Pump Relay Control C027B 02 C027B 5A C027B 01 -
Vacuum Pump Relay Ground - 1 - -
1. Brake Booster Pump Motor Always OFF
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