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GMC
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2018
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Acadia SL
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Repair and Diagnosis
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Brakes
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Mechanical - Hydraulic
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Hydraulic Brakes
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Diagnostic Information And Procedures
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DTC P0556, P0557, Or P0558: Brake Booster Pressure Sensor
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Conditions for Running the DTC
Conditions for Running the DTC
P0556
Engine Running.
P0557 or P0558
Ignition ON/Ignition ON/Vehicle in Service Mode.