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P06C7 2017 GMC Sierra Code - Cylinder 3 Glow Plug Incorrect

Quick Answer

The P06C7 diagnostic trouble code (DTC) specifically pertains to the glow plug system of a diesel engine, indicating that there is an issue with the glow plug associated with cylinder 3. Common causes include Faulty glow plug for cylinder 3, Damaged or corroded wiring or connectors associated with the glow plug, Malfunctioning glow plug relay or 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 2017 GMC Sierra indicates Cylinder 3 Glow Plug Incorrect.
Common causes
Common causes include Faulty glow plug for cylinder 3, Damaged or corroded wiring or connectors associated with the glow plug, Malfunctioning glow plug relay or 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.
What is this?
Table of contents Created and updated by William Orellana on Oct 17, 2024
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Code P06C7 2017 GMC Sierra Description

The P06C7 diagnostic trouble code (DTC) specifically pertains to the glow plug system of a diesel engine, indicating that there is an issue with the glow plug associated with cylinder 3. Glow plugs are critical components in diesel engines, as they preheat the combustion chamber to facilitate cold starts and improve engine performance during low-temperature conditions. When the Engine Control Module (ECM) detects that the glow plug for cylinder 3 is either malfunctioning or not functioning as expected, it triggers this code.

OBDII Code P06C7 2017 GMC Sierra - Cylinder 3 Glow Plug Incorrect
P06C7 2017 GMC Sierra Code - Cylinder 3 Glow Plug Incorrect

Common Causes of P06C7 2017 GMC Sierra

  1. Faulty glow plug for cylinder 3.
  2. Damaged or corroded wiring or connectors associated with the glow plug.
  3. Malfunctioning glow plug relay or control module.
  4. ECM software issues or programming errors.
  5. Physical damage to the glow plug due to overheating or wear.

Symptoms of P06C7 2017 GMC Sierra

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough idling or misfiring during engine operation.
  3. Increased exhaust smoke, particularly white or black smoke.
  4. Decreased fuel efficiency and overall engine performance.
  5. Activation of the check engine light on the dashboard.

How to Fix P06C7 2017 GMC Sierra

  1. Diagnostic Verification: Begin by using an OBD-II scanner to confirm the P06C7 code and check for any additional codes that may indicate related issues.
  2. Visual Inspection: Inspect the wiring and connectors leading to the glow plug for signs of damage, corrosion, or loose connections.
  3. Test the Glow Plug: Remove the glow plug and test it for continuity using a multimeter. Replace it if it is found to be faulty.
  4. Check the Relay and ECM: Test the glow plug relay and ensure the ECM is functioning correctly. Update or replace the relay if necessary.
  5. Clear Codes and Test Drive: After repairs, clear the DTCs and take the vehicle for a test drive to ensure the issue is resolved and the check engine light does not reappear.

Cost to Fix P06C7 2017 GMC Sierra

The typical repair costs for resolving a P06C7 code can vary significantly based on the specific repairs needed. Generally, the cost for parts such as glow plugs can range from $20 to $100 each, while labor costs can add an additional $100 to $300, depending on the complexity of the repair and the shop's labor rates. Overall, the total repair cost could range from $150 to $500.

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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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