P0563 GMC System Voltage High
Possible causes
– Battery defective
– Loose or missing alternator drive belt
– Faulty alternator
– Open or short system voltage circuit
– Loose or missing alternator drive belt
– Faulty alternator
– Open or short system voltage circuit
Tech description
Higher than expected voltage problems are most Possible Causesd by bad voltage regulator. The voltage regulator is part of the alternator.
What about the obd code?
The P0563 GMC code is detected when the battery voltage detected by the ECM is more than a calibrated value
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0563 GMC Description
The battery supplies electricity to the Engine Control Module (ECM) even when the ignition switch is OFF. This electricity allows the ECM to store data such as Detected Trouble Code (DTC) history, freeze frame data, fuel trim values and other data. If the battery voltage falls below a minimum level, the ECM will conclude that there is a fault in the power supply circuit. The next time the engine starts, the ECM will turn on the Malfunction Indicator Light (MIL) and a DTC will be set.
GMC Vehicle:GMC Acadia,GMC Canyon,GMC Envoy,GMC Savana 1500,GMC Savana 2500,GMC Savana 3500,GMC Sierra 1500,GMC Sierra 2500 HD,GMC Sierra 3500 HD,GMC Terrain,GMC Yukon,GMC Yukon XL 1500,GMC Yukon XL 2500,