AutoCodes – GMC – U0106 GMC

U0106 GMC Code - Lost Communication With Glow Plug Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. 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: U0106 GMC indicates Lost Communication With 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,364

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 Mar 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U0106 GMC Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Glow Plug Control Module has not been received.

OBDII Code U0106 GMC - Lost Communication With Glow Plug Control Module - AutoCodes.com — U0106 GMC Code - Lost Communication With Glow Plug Control Module

What does this mean?

What are the Possible Causes of the DTC U0106 GMC?

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 U0106 GMC?

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 U0106 GMC 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 U0106 GMC code?

Need more information on how to fix the U0106 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0106 GMC code diagnosed by a professional: Find a repair shop in your area

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 U0106 GMC Code

1. What are the common symptoms of OBDII code U0106 in a GMC related to the Glow Plug Control Module?

- Common symptoms include hard starting, rough idling, decreased engine performance, and the illumination of the check engine light.

2. What are the possible causes of the U0106 code indicating a lost communication with the Glow Plug Control Module in a GMC?

- The code U0106 can be triggered by issues such as a faulty Glow Plug Control Module, damaged wiring or connectors, or a communication network problem.

3. How can I diagnose the U0106 code in my GMC to determine if the Glow Plug Control Module is the culprit?

- To diagnose the issue, you can use an OBDII scanner to read the trouble codes, inspect the wiring and connectors for any visible damage, and perform a communication network test.

4. Are there any specific repair tips for addressing the U0106 code related to the Glow Plug Control Module in a GMC?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the Glow Plug Control Module if necessary, and resetting the trouble codes with the OBDII scanner.

5. Can a DIY enthusiast with basic automotive knowledge fix the U0106 code indicating a lost communication with the Glow Plug Control Module in a GMC?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing complex electrical issues like this code may require professional expertise.

6. Is it safe to continue driving my GMC with the U0106 code related to the Glow Plug Control Module issue?

- It is not recommended to continue driving the vehicle with the U0106 code present, as it can lead to further damage to the engine components and may result in poor performance and fuel efficiency.

7. How much can I expect to pay for repairing the U0106 code associated with the Glow Plug Control Module in a GMC?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can weather conditions or extreme temperatures cause the U0106 code to appear in a GMC's diagnostic system?

- Extreme temperatures or weather conditions can potentially affect the performance of the Glow Plug Control Module and lead to communication issues triggering the U0106 code.

9. Are there any preventive measures I can take to avoid encountering the U0106 code related to the Glow Plug Control Module in my GMC?

- Regular maintenance checks, ensuring proper wiring connections, and timely replacement of faulty components can help prevent issues like the U0106 code from occurring.

10. Will resetting the trouble codes using an OBDII scanner make the U0106 code disappear permanently if the underlying issue is not fixed?

- Resetting the trouble codes may temporarily clear the U0106 code, but it will reappear if the root cause, such as a malfunctioning Glow Plug Control Module, is not addressed.