AutoCodes – GMC – P064C 2014 GMC Sierra

P064C 2014 GMC Sierra Code - Glow Plug Control Module

Quick Answer

The Glow Plug Control Module has the ability to perform internal self-test diagnostics. Common causes include Faulty Glow Plug Control Module, Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection. 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: P064C 2014 GMC Sierra indicates Glow Plug Control Module.
Common causes: Common causes include Faulty Glow Plug Control Module, Glow Plug Control Module harness is open or shorted, Glow Plug Control Module circuit poor electrical connection.
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 273

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 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P064C 2014 GMC Sierra Description

The Glow Plug Control Module has the ability to perform internal self-test diagnostics. If the Glow Plug Control Module detects a failure in any of the internal self-tests it will send a message to the Engine Control Module (ECM) to set this Diagnostic Trouble Code (DTC).

OBDII Code P064C 2014 GMC Sierra - Glow Plug Control Module - AutoCodes.com — P064C 2014 GMC Sierra Code - Glow Plug Control Module

What does this mean?

What are the Possible Causes of the DTC P064C 2014 GMC Sierra?

Faulty Glow Plug Control Module
Glow Plug Control Module harness is open or shorted
Glow Plug Control Module circuit poor electrical connection

How to Fix the DTC P064C 2014 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P064C 2014 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 P064C 2014 GMC Sierra code?

Need more information on how to fix the P064C 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P064C 2014 GMC Sierra Code

1. What does the OBDII code P064C mean on a 2014 GMC Sierra?

The P064C code indicates a malfunction in the Glow Plug Control Module, which is responsible for managing the glow plugs used to help start the engine in cold conditions.

2. What are the common symptoms of the P064C code in a GMC Sierra?

Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and the illumination of the check engine light.

3. What causes the P064C code to appear on a 2014 GMC Sierra?

Common causes include a faulty Glow Plug Control Module, damaged wiring or connectors, blown fuses, or issues with the powertrain control module (PCM).

4. Can I drive my 2014 GMC Sierra with a P064C code?

While the vehicle may still be drivable, you could experience cold-start issues, and ignoring the code can lead to further damage over time.

5. How do you diagnose the P064C code in a GMC Sierra?

Diagnosis involves scanning for codes, inspecting the wiring and connectors for damage, testing the Glow Plug Control Module, and verifying the voltage supply and ground connections.

6. How do you fix the P064C code on a 2014 GMC Sierra?

Repairs may include replacing the Glow Plug Control Module, repairing damaged wiring or connectors, replacing blown fuses, or reprogramming/updating the PCM if needed.

7. How much does it cost to repair the P064C code on a GMC Sierra?

Repair costs can vary but typically range from $200 to $600 depending on whether the Glow Plug Control Module needs replacement or if the issue is related to wiring.

8. Can a bad glow plug cause the P064C code?

No, the P064C code specifically relates to the Glow Plug Control Module malfunction, not individual glow plugs, though related issues may coexist.

9. Do I need to replace the Glow Plug Control Module to clear the P064C code?

Not always. Sometimes, the issue can be resolved by repairing damaged wiring, replacing a fuse, or addressing a software issue.

10. Will clearing the code with a scan tool fix the P064C problem?

No, clearing the code will only reset the check engine light temporarily. The underlying issue must be diagnosed and repaired to prevent the code from returning.