AutoCodes – GMC – P0560 GMC

P0560 GMC Code - System Voltage Malfunction

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: P0560 GMC indicates System Voltage Malfunction.
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.

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Code Popularity 1,708

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 04, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0560 GMC Description

The Powertrain Control Module (PCM) continuously monitors the system voltage. The system voltage information is taken from the PCM's ignition feed circuits. Voltages below 8.0 volts or above 17.1 volts cause improper system operation and/or component damage. If the system voltage is low the PCM raises the idle speed in order to increase the generator output. The PCM disables most outputs to protect the hardware if the system voltage is high. A scan tool may not display data if system voltage is outside this range.

OBDII Code P0560 GMC - System Voltage Malfunction - AutoCodes.com — P0560 GMC Code - System Voltage Malfunction

What does this mean?

What are the Possible Causes of the DTC P0560 GMC?

Battery defective
Loose or missing alternator drive belt
Faulty alternator
Open or short system voltage circuit

How to Fix the DTC P0560 GMC?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0560 GMC 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 P0560 GMC code?

Need more information on how to fix the P0560 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0560 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0560 2014 GMC Sierra — System Voltage Malfunction
P0560 2015 GMC Sierra — System Voltage Malfunction
P0560 2016 GMC Sierra — System Voltage Malfunction
P0560 2017 GMC Sierra — System Voltage Malfunction
P0560 2018 GMC Sierra — System Voltage Malfunction

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0560 GMC Code

1. What does OBDII code P0560 GMC indicate?

The P0560 code in GMC vehicles signifies a System Voltage Malfunction, indicating an issue with the vehicle's electrical system.

2. What are the common symptoms of a P0560 fault code?

Common symptoms of a P0560 code may include dimming or flickering lights, problems with starting the vehicle, erratic dashboard gauge behavior, and potential issues with the vehicle's electrical components.

3. What are the possible causes of a P0560 fault code in a GMC vehicle?

Potential causes of a P0560 code include a faulty alternator, a weak or dead battery, corroded or loose battery terminals, damaged wiring in the electrical system, or a malfunctioning voltage regulator.

4. How can I diagnose a P0560 fault code in my GMC vehicle?

Diagnosing a P0560 code typically involves checking the battery voltage, inspecting the alternator output, testing the battery terminals for corrosion or looseness, and examining the wiring and connections in the vehicle's electrical system.

5. Can I drive my GMC vehicle with a P0560 fault code?

It is not recommended to drive your GMC vehicle with a P0560 fault code, as it indicates a potential issue with the electrical system that could lead to further damage or safety hazards.

6. How can I repair a P0560 fault code in my GMC vehicle?

Repairing a P0560 fault code may involve replacing a faulty alternator, installing a new battery, cleaning or tightening battery terminals, repairing damaged wiring, or replacing a malfunctioning voltage regulator.

7. Will resetting the fault code make the issue go away?

Resetting the fault code may temporarily clear the warning light, but it will not fix the underlying issue causing the P0560 code. It is essential to diagnose and repair the problem to prevent further complications.

8. Is it safe to continue driving if the P0560 fault code appears intermittently?

Driving with an intermittent P0560 fault code is not recommended, as the issue may worsen over time and potentially lead to a complete electrical system failure while driving.

9. How much does it typically cost to repair a P0560 fault code in a GMC vehicle?

The cost of repairing a P0560 fault code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a DIY enthusiast fix a P0560 fault code, or is professional help necessary?

While some experienced DIY enthusiasts may be able to diagnose and repair a P0560 fault code, it is recommended to seek professional help, especially for complex electrical system issues, to ensure proper diagnosis and repair.