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P0675 GMC Code - Cylinder 5 Glow Plug Circuit Fault

Quick Answer

The P0675 diagnostic trouble code for GMC vehicles indicates a fault in the cylinder 5 glow plug circuit. Common causes include Faulty glow plug, Damaged wiring or connectors in the glow plug circuit, Corrosion or poor connection at the glow plug. 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
P0675 GMC indicates Cylinder 5 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug, Damaged wiring or connectors in the glow plug circuit, Corrosion or poor connection at the glow plug.
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 Sep 06, 2024
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Code P0675 GMC Description

The P0675 diagnostic trouble code for GMC vehicles indicates a fault in the cylinder 5 glow plug circuit. Glow plugs are essential for diesel engines as they heat the combustion chamber to aid in cold starting. When this circuit malfunctions, it can lead to difficulties in starting the engine, especially in cold weather conditions. If left unresolved, it can cause issues with engine performance, fuel efficiency, and emissions.

OBDII Code P0675 GMC - Cylinder 5 Glow Plug Circuit Fault
P0675 GMC Code - Cylinder 5 Glow Plug Circuit Fault

Common Causes of P0675 GMC

  1. Faulty glow plug
  2. Damaged wiring or connectors in the glow plug circuit
  3. Corrosion or poor connection at the glow plug
  4. Issues with the glow plug control module
  5. Engine control module (ECM) failure

Symptoms of P0675 GMC

  1. Hard starting or extended cranking time
  2. Engine misfires or rough idling
  3. Reduced fuel efficiency
  4. Illuminated check engine light
  5. Increased smoke from the exhaust

How to Fix P0675 GMC

  1. Perform a visual inspection of the glow plug and its wiring for any signs of damage or corrosion.
  2. Test the glow plug using a multimeter to check for continuity and proper resistance.
  3. Replace the faulty glow plug if necessary.
  4. Inspect and repair any damaged wiring or connectors in the glow plug circuit.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue is resolved.

Cost to Fix P0675 GMC

The typical cost to repair a cylinder 5 glow plug circuit fault can range from $100 to $300, including parts and labor. However, the final cost may vary depending on the specific diagnosis time, labor rates, and the price of replacement parts at the auto repair shop. It's advisable to consult with a professional mechanic to get an accurate estimate based on your vehicle's make and model.

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Tech Notes for P0675 GMC





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Information for Specific GMC Models

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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