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Engine-Codes – GMC – U007C 2015 GMC Sierra

U007C 2015 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus 2 Off

Quick Answer

The U007C diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Control Module Communication High Speed Extension CAN Bus 2. Common causes include Faulty control module on the high-speed CAN Bus 2, Wiring or connection issues in the CAN network, Corrosion or damage to the CAN Bus connectors. 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
U007C 2015 GMC Sierra indicates Control Module Communication High Speed Extension CAN Bus 2 Off.
Common causes
Common causes include Faulty control module on the high-speed CAN Bus 2, Wiring or connection issues in the CAN network, Corrosion or damage to the CAN Bus connectors.
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 15, 2024
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Code U007C 2015 GMC Sierra Description

The U007C diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Control Module Communication High Speed Extension CAN Bus 2. This code specifically points to a communication issue within the vehicle's network, particularly on the high-speed CAN Bus 2. The Controller Area Network (CAN) system is a critical communication network in modern vehicles that allows various control modules to communicate with each other. The high-speed CAN Bus 2 is responsible for transmitting data between specific modules in the vehicle.

OBDII Code U007C 2015 GMC Sierra - Control Module Communication High Speed Extension CAN Bus 2 Off
U007C 2015 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus 2 Off

Common Causes of U007C 2015 GMC Sierra

  1. Faulty control module on the high-speed CAN Bus 2
  2. Wiring or connection issues in the CAN network
  3. Corrosion or damage to the CAN Bus connectors
  4. Software glitches or programming errors in the control modules
  5. Electrical interference from aftermarket accessories or modifications

Symptoms of U007C 2015 GMC Sierra

  1. Illumination of the check engine light
  2. Erratic behavior of electronic components (e.g., radio, HVAC controls)
  3. Loss of communication with certain control modules
  4. Vehicle stalling or hesitation during acceleration
  5. Inability to access certain features or functions through the vehicle's interface

How to Fix U007C 2015 GMC Sierra

  1. Begin by conducting a thorough inspection of the high-speed CAN Bus 2 system, checking for any visible damage to the wiring, connectors, or control modules.
  2. Use a diagnostic scan tool to retrieve the specific trouble codes and identify the exact location of the communication fault.
  3. Test the continuity and resistance of the CAN Bus circuits to pinpoint the source of the issue.
  4. Replace any faulty control modules, repair damaged wiring or connectors, and ensure all connections are secure and free of corrosion.
  5. Clear the DTCs from the vehicle's memory and perform a test drive to confirm that the communication issue has been resolved.

Cost to Fix U007C 2015 GMC Sierra

The typical repair costs for addressing a U007C code on a 2015 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on various factors, so it's advisable to obtain quotes from local shops for a more accurate estimate. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing.

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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.

Frequently Asked Questions about U007C 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code U007C in a 2015 GMC Sierra?

The common symptoms of OBDII code U007C in a 2015 GMC Sierra include issues with the vehicle's communication network, such as difficulty starting the engine, misfiring, and dashboard warning lights.

2. What does the OBDII code U007C indicate in a 2015 GMC Sierra?

The OBDII code U007C in a 2015 GMC Sierra indicates a problem with the Control Module Communication High Speed Extension CAN Bus 2 Off, meaning there is a communication error in the high-speed network of the vehicle.

3. What are the possible causes of OBDII code U007C in a 2015 GMC Sierra?

Possible causes of OBDII code U007C in a 2015 GMC Sierra include faulty wiring or connections in the CAN Bus system, a defective control module, software issues, or a malfunctioning communication network component.

4. How can I diagnose OBDII code U007C in a 2015 GMC Sierra?

Diagnosing OBDII code U007C in a 2015 GMC Sierra involves using a diagnostic scanner to retrieve the code, checking the wiring and connections in the CAN Bus system, testing the control modules, and inspecting for any software-related issues.

5. Can I continue driving my 2015 GMC Sierra with OBDII code U007C?

It is not recommended to continue driving a 2015 GMC Sierra with OBDII code U007C, as unresolved communication issues can lead to further vehicle performance problems and potential safety risks.

6. How can I repair OBDII code U007C in a 2015 GMC Sierra?

Repairing OBDII code U007C in a 2015 GMC Sierra may involve fixing faulty wiring or connections, replacing a defective control module, updating software, or repairing/replacing any malfunctioning communication network components.

7. Is it necessary to reset the OBDII code U007C after repairs in a 2015 GMC Sierra?

Yes, it is important to reset the OBDII code U007C after completing repairs in a 2015 GMC Sierra. This will clear the code from the vehicle's memory and allow you to monitor if the issue has been successfully resolved.

8. Can a DIY enthusiast fix OBDII code U007C in a 2015 GMC Sierra?

While some aspects of diagnosing and repairing OBDII code U007C in a 2015 GMC Sierra may be tackled by a knowledgeable DIY enthusiast, complex electrical and communication system issues may require professional expertise.

9. How much does it cost to repair OBDII code U007C in a 2015 GMC Sierra?

The cost to repair OBDII code U007C in a 2015 GMC Sierra can vary depending on the root cause of the issue, the extent of the repairs needed, and whether you choose to address the problem yourself or seek assistance from a professional mechanic.

10. Are there any recalls related to OBDII code U007C in a 2015 GMC Sierra?

It is advisable to check with the manufacturer or authorized dealerships for any recalls related to OBDII code U007C in a 2015 GMC Sierra, as some vehicle issues may be covered under warranty or recall programs.

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