Result:

p0563

Generic
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    System Voltage High

GM
Type:
    Powertrain - Vehicle Speed, Idle Control, and Auxiliary Inputs - ISO/SAE Controlled
Description:
    System Voltage High Conditions
Cause:
    Engine running, then the PCM detected that the system voltage was more than 17 volts for 3 seconds Note This code can set if the vehicle is used to jump-start another vehicle

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