Engine-CodesGMC – P06C7 2015 GMC Sierra

P06C7 2015 GMC Sierra Code - Cylinder 3 Glow Plug Incorrect

Quick Answer

The diagnostic trouble code P06C7 for a 2015 GMC Sierra indicates that there is an issue with the glow plug in cylinder 3 of the engine. Common causes include Faulty glow plug in cylinder 3, Wiring issues, Bad glow plug control module. 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
P06C7 2015 GMC Sierra indicates Cylinder 3 Glow Plug Incorrect.
Common causes
Common causes include Faulty glow plug in cylinder 3, Wiring issues, Bad glow plug control module.
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.
Table of contents Created and updated by William Orellana on Sep 23, 2024
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Code P06C7 2015 GMC Sierra Description

The diagnostic trouble code P06C7 for a 2015 GMC Sierra indicates that there is an issue with the glow plug in cylinder 3 of the engine. Glow plugs are essential components in diesel engines, as they help to heat the combustion chamber for easier cold starting. When the glow plug in cylinder 3 is not functioning correctly, it can lead to difficulties starting the engine, reduced fuel efficiency, and potential engine misfires.

OBDII Code P06C7 2015 GMC Sierra - Cylinder 3 Glow Plug Incorrect
P06C7 2015 GMC Sierra Code - Cylinder 3 Glow Plug Incorrect

Common Causes of P06C7 2015 GMC Sierra

  1. Faulty glow plug in cylinder 3
  2. Wiring issues
  3. Bad glow plug control module
  4. Engine computer system malfunction
  5. Corrosion or carbon buildup on the glow plug

Symptoms of P06C7 2015 GMC Sierra

  1. Rough idling
  2. Hard starting, especially in cold weather
  3. Reduced power output
  4. Increased emissions
  5. Illumination of the check engine light

How to Fix P06C7 2015 GMC Sierra

  1. Diagnose the specific cause of the issue using a diagnostic scanner to pinpoint the faulty component.
  2. Test the glow plug in cylinder 3 to determine if it is functioning correctly.
  3. Inspect the wiring harness and connections for any damage or corrosion.
  4. Replace the faulty glow plug, wiring, or control module as needed.
  5. Clear the diagnostic trouble code and test the vehicle to ensure the issue has been resolved.

Cost to Fix P06C7 2015 GMC Sierra

The typical repair costs for addressing a cylinder 3 glow plug incorrect code can range from $150 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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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.

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