P0563 2017 GMC Sierra Code - System Voltage High
Quick Answer
The Powertrain Control Module (PCM) continuously monitors the system voltage. Common causes include Battery defective, Loose or missing alternator drive belt, Faulty alternator. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0563 2017 GMC Sierra indicates System Voltage High.
- Common causes
- Common causes include Battery defective, Loose or missing alternator drive belt, Faulty alternator.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0563 2017 GMC Sierra Description
What are the Possible Causes of the DTC P0563 2017 GMC Sierra?
- Battery defective
- Loose or missing alternator drive belt
- Faulty alternator
- Open or short system voltage circuit
How to Fix the DTC P0563 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0563 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0563 2017 GMC Sierra code?
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Frequently Asked Questions about P0563 2017 GMC Sierra Code
1. What does the OBDII code P0563 mean on a 2017 GMC Sierra?
P0563 indicates that the vehicle's powertrain control module (PCM) has detected excessively high system voltage, typically above 16 volts.
2. What are the common symptoms of code P0563 in a 2017 GMC Sierra?
Symptoms may include the battery warning light illuminating, dimming or flickering headlights, erratic electrical system behavior, or difficulty starting the engine.
3. What causes the P0563 code to appear in a 2017 GMC Sierra?
Common causes include a faulty alternator, defective voltage regulator, loose or corroded battery connections, or a damaged PCM.
4. Can I drive my 2017 GMC Sierra with a P0563 code?
Driving with this code is not recommended because high voltage can damage sensitive electrical components and lead to further issues.
5. How do I diagnose the P0563 code in my 2017 GMC Sierra?
Start by checking the battery voltage with a multimeter, inspect battery terminals for corrosion, test the alternator output, and verify the voltage regulator operation.
6. How can I fix the P0563 code on my 2017 GMC Sierra?
Repairs might include replacing a faulty alternator or voltage regulator, cleaning or tightening battery connections, or replacing a damaged PCM.
7. Can a bad alternator cause the P0563 code?
Yes, a malfunctioning alternator that overcharges the electrical system can trigger the P0563 code.
8. Will clearing the P0563 code fix the problem on my 2017 GMC Sierra?
Clearing the code without addressing the root cause will not resolve the issue, and the code will likely return.
9. Is the P0563 code related to the battery in my 2017 GMC Sierra?
It can be related if the battery is overcharged due to a defective alternator or voltage regulator, or if there are poor battery connections.
10. How much does it cost to fix the P0563 code on a 2017 GMC Sierra?
Repair costs depend on the cause but can range from $100 to $500, with alternator replacement typically being the most expensive fix.
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