P06C7 2014 GMC Sierra Code - Cylinder 3 Glow Plug Incorrect
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 glow plug 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
- P06C7 2014 GMC Sierra indicates Cylinder 3 Glow Plug Incorrect.
- Common causes
- Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 glow plug 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.
Code P06C7 2014 GMC Sierra Description
Control of the glow plugs is accomplished by the glow plug control module. The nominal voltage for the glow plugs is 5.4 volts. When the ignition is turned On, the glow plug control module applies 7.2 V for 2.2 s, then 5.7 V for 0.8 s, and then 5.4 V until 1200°C (2192°F) is reached. The maximum voltage of the system is 10 V. While the engine is running the voltage will vary between 4.7 - 10 V when in closed loop control to maintain a glow plug temperature that ranges from 1150° - 1180°C (2102° - 2156°F). The temperature and the power consumption are controlled between the Engine Control Module (ECM) and the glow plug control module within a wide range to suit the engine's pre-heating requirements. Each glow plug is energized individually. This capability yields more optimum heat times for the glow plugs, thus pre - glow times can be kept to a minimum for a short wait to crank times and maximum glow plug durability. A Diagnostic Trouble Code (DTC) will be set if the Glow Plug resistance is not within a calibrated range.
What are the Possible Causes of the DTC P06C7 2014 GMC Sierra?
- Faulty cylinder #1 glow plug
- Cylinder #1 glow plug harness is open or shorted
- Cylinder #1 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P06C7 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 P06C7 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 P06C7 2014 GMC Sierra code?
Need more information on how to fix the P06C7 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P06C7 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P06C7 2014 GMC Sierra Code
What does the OBDII code P06C7 mean for a 2014 GMC Sierra?
P06C7 indicates "Cylinder 3 Glow Plug Incorrect," meaning there is an issue with the glow plug in cylinder 3, such as malfunction, incorrect type, or improper operation.
What are the symptoms of code P06C7 in a 2014 GMC Sierra?
Common symptoms include difficulty starting in cold weather, rough idle, reduced engine performance, and the illumination of the check engine light.
What causes the P06C7 code to appear in a 2014 GMC Sierra?
The code can be caused by a faulty glow plug, incorrect installation of the plug, damaged wiring or connectors, or an issue with the glow plug control module.
Can I drive my 2014 GMC Sierra with the P06C7 code?
While the truck may still run, driving with this code could lead to poor cold-weather starts, reduced performance, or further engine damage if not addressed.
How do I diagnose the P06C7 code in a 2014 GMC Sierra?
Begin by checking the glow plug in cylinder 3 for proper function, inspecting the wiring and connectors for damage, and testing the glow plug control module.
How do I fix the P06C7 code on a 2014 GMC Sierra?
Repairs may include replacing the faulty glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if it's defective.
How much does it cost to fix the P06C7 code on a 2014 GMC Sierra?
The cost can vary, but replacing a glow plug typically costs $100–$300 depending on labor rates and parts pricing.
Can a faulty glow plug in cylinder 3 damage the engine?
While a faulty glow plug itself may not directly damage the engine, it can cause hard starts and incomplete combustion, potentially leading to long-term issues if left unresolved.
Do I need to replace all the glow plugs if one is faulty?
It’s not always necessary, but replacing all glow plugs at the same time can ensure consistent performance and prevent future failures.
Can a P06C7 code trigger other codes in my 2014 GMC Sierra?
Yes, related codes like P0673 (Cylinder 3 Glow Plug Circuit) or codes related to the glow plug control module may also appear.
Discuss the causes and fixes for P06C7 2014 GMC Sierra OBDII Code
Code P06C7 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
