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U0073 2017 GMC Sierra Code - Control Module Communication Bus OFF

Quick Answer

The U0073 code for a 2017 GMC Sierra indicates a Control Module Communication Bus OFF error. Common causes include Faulty wiring or connections in the communication bus system, Corrosion or damage to the control module connectors, Software glitches or bugs in the control modules. 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
U0073 2017 GMC Sierra indicates Control Module Communication Bus OFF.
Common causes
Common causes include Faulty wiring or connections in the communication bus system, Corrosion or damage to the control module connectors, Software glitches or bugs in the control modules.
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 19, 2024
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Code U0073 2017 GMC Sierra Description

The U0073 code for a 2017 GMC Sierra indicates a Control Module Communication Bus OFF error. This means that there is a communication issue between the various control modules in the vehicle. The control modules in modern vehicles are responsible for managing and coordinating various functions such as engine performance, transmission shifting, ABS braking, airbag deployment, and more. When the communication bus is offline, it can lead to a range of issues affecting the vehicle's performance and safety.

OBDII Code U0073 2017 GMC Sierra - Control Module Communication Bus OFF
U0073 2017 GMC Sierra Code - Control Module Communication Bus OFF

Common Causes of U0073 2017 GMC Sierra

  1. Faulty wiring or connections in the communication bus system.
  2. Corrosion or damage to the control module connectors.
  3. Software glitches or bugs in the control modules.
  4. Electrical issues such as a short circuit or power surge.
  5. Water damage or exposure to moisture affecting the control modules.

Symptoms of U0073 2017 GMC Sierra

  1. Check engine light illuminated on the dashboard.
  2. Loss of communication with certain control modules (e.g., ABS, airbag, transmission).
  3. Erratic behavior in vehicle systems (e.g., sudden changes in engine performance, shifting issues).
  4. Inability to access certain features or functions controlled by the affected modules.
  5. Vehicle may go into limp mode, limiting performance and speed.

How to Fix U0073 2017 GMC Sierra

  1. Perform a thorough inspection of the wiring harness and connectors in the communication bus system.
  2. Check for any signs of corrosion or damage to the control module connectors.
  3. Use diagnostic tools to scan for software errors and update control module software if necessary.
  4. Test the electrical system for any shorts or power irregularities.
  5. Address any water damage by drying out affected areas and sealing vulnerable components.

Cost to Fix U0073 2017 GMC Sierra

The typical repair costs for addressing a Control Module Communication Bus OFF error can vary depending on the specific cause and extent of the issue. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly. Rates typically range between $80 and $150 per hour, with higher rates in metropolitan areas or at dealerships and lower rates at independent shops. To get a more accurate estimate, it's recommended to consult with local auto repair shops.

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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 U0073 2017 GMC Sierra Code

1. What does the OBDII code U0073 for a 2017 GMC Sierra mean?

When you see the U0073 code, it indicates a Control Module Communication Bus OFF error.

2. What are the common symptoms of the U0073 code in a 2017 GMC Sierra?

Common symptoms include multiple warning lights illuminated on the dashboard, loss of communication with various control modules, and potential drivability issues.

3. What are the possible causes of the U0073 code in a 2017 GMC Sierra?

Potential causes of the U0073 code include faulty wiring or connectors, a defective control module, a communication bus malfunction, or software issues.

4. How can I diagnose the U0073 code in my 2017 GMC Sierra?

Diagnosing the U0073 code typically involves checking the wiring and connectors for damage, testing the control modules for proper function, and using a diagnostic scanner to assess communication on the bus network.

5. Can I still drive my 2017 GMC Sierra with the U0073 code present?

It is not recommended to drive your vehicle with the U0073 code active, as it can lead to further issues and potential safety risks. It's best to address the problem promptly.

6. How can I repair the U0073 code in my 2017 GMC Sierra?

Repairing the U0073 code may involve repairing or replacing damaged wiring or connectors, reprogramming control modules, resetting the communication bus, or seeking assistance from a professional technician.

7. Will resetting the U0073 code make it go away permanently?

Resetting the code may clear it temporarily, but if the underlying issue causing the U0073 code is not addressed, it is likely to reoccur. It's important to diagnose and repair the root cause of the problem.

8. Can a DIY enthusiast fix the U0073 code in a 2017 GMC Sierra?

While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the U0073 code may require specialized tools and expertise. It's best to consult a professional technician for proper diagnosis and repair.

9. Is the U0073 code specific to the 2017 GMC Sierra?

The U0073 code is a generic communication error code that can appear in various vehicle makes and models, not exclusive to the 2017 GMC Sierra.

10. How much does it typically cost to repair the U0073 code in a 2017 GMC Sierra?

The cost of repairing the U0073 code can vary depending on the extent of the issue, the parts needed for repair, and the labor rates of the repair shop. It is advisable to obtain a diagnosis and repair estimate from a qualified technician.

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