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U184D 2015 GMC Sierra Code - Lost Communication with Radio on Low Speed CAN Bus

Quick Answer

The diagnostic trouble code U184D for a 2015 GMC Sierra indicates that there is a communication issue with the radio on the Low Speed Controller Area Network (CAN) bus. Common causes include Faulty radio module, Loose or corroded wiring connections in the CAN bus network, Software issues in the radio module. 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
U184D 2015 GMC Sierra indicates Lost Communication with Radio on Low Speed CAN Bus.
Common causes
Common causes include Faulty radio module, Loose or corroded wiring connections in the CAN bus network, Software issues in the radio module.
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 16, 2024
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Code U184D 2015 GMC Sierra Description

The diagnostic trouble code U184D for a 2015 GMC Sierra indicates that there is a communication issue with the radio on the Low Speed Controller Area Network (CAN) bus. The CAN bus is a network that allows various modules in the vehicle to communicate with each other. In this case, the radio module is not communicating properly with other modules on the network. This can lead to a variety of issues with the vehicle's systems and potentially affect its overall performance.

OBDII Code U184D 2015 GMC Sierra - Lost Communication with Radio on Low Speed CAN Bus
U184D 2015 GMC Sierra Code - Lost Communication with Radio on Low Speed CAN Bus

Common Causes of U184D 2015 GMC Sierra

  1. Faulty radio module
  2. Loose or corroded wiring connections in the CAN bus network
  3. Software issues in the radio module
  4. Faulty CAN bus network
  5. Electrical interference affecting communication on the CAN bus

Symptoms of U184D 2015 GMC Sierra

  1. Check engine light illuminated on the dashboard
  2. Radio not functioning properly or completely unresponsive
  3. Loss of audio output from the radio
  4. Inability to control certain features through the radio interface
  5. Other systems relying on radio information may malfunction

How to Fix U184D 2015 GMC Sierra

  1. Perform a diagnostic scan to confirm the U184D code and identify the specific communication issue.
  2. Inspect wiring connections in the CAN bus network for any loose or corroded connections.
  3. Check for any software updates for the radio module and perform the update if necessary.
  4. Test the radio module for proper functionality and replace if deemed faulty.
  5. Clear the trouble code and test the vehicle to ensure proper communication between the radio and other modules on the CAN bus network.

Cost to Fix U184D 2015 GMC Sierra

The cost of repairing a communication issue with the radio on the Low Speed CAN bus can vary depending on the specific cause of the problem. In general, the cost of parts for a radio module replacement can range from $200 to $600, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may fall between $300 and $900. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is advisable to check with local shops for a more accurate estimate.

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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 U184D 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code U184D in a 2015 GMC Sierra related to lost communication with the radio on the low-speed CAN bus?

- Common symptoms include the radio not working, loss of sound, issues with steering wheel controls, and potential display malfunctions.

2. What are the possible causes of OBDII code U184D in a 2015 GMC Sierra indicating lost communication with the radio on the low-speed CAN bus?

- Possible causes can include a faulty radio unit, damaged wiring or connectors, a problem with the low-speed CAN bus network, or issues with the body control module.

3. How can I diagnose the issue causing OBDII code U184D in my 2015 GMC Sierra?

- It is recommended to use a diagnostic scanner to check for the code, inspect the wiring and connectors related to the radio and CAN bus, and perform a thorough system check to identify the root cause.

4. What are some repair tips for fixing the lost communication with the radio on the low-speed CAN bus issue in a 2015 GMC Sierra?

- Repair tips may include checking and repairing any damaged wiring, replacing a malfunctioning radio unit, ensuring proper connections, and reprogramming the body control module if necessary.

5. Can OBDII code U184D in a 2015 GMC Sierra be reset without fixing the underlying issue?

- While you can clear the code using a diagnostic scanner, it is not recommended to reset the code without addressing the underlying problem, as it may lead to recurring issues and potential safety hazards.

6. Is it safe to continue driving my 2015 GMC Sierra with OBDII code U184D related to lost communication with the radio on the low-speed CAN bus?

- It is generally not recommended to drive the vehicle with unresolved communication issues, as it may affect other systems connected to the CAN bus network and compromise the overall functionality of the vehicle.

7. How much does it typically cost to repair OBDII code U184D in a 2015 GMC Sierra?

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

8. Are there any recalls or technical service bulletins related to OBDII code U184D in a 2015 GMC Sierra?

- It is advisable to check with your local GMC dealership or online resources to see if there are any relevant recalls or technical service bulletins addressing the specific issue of lost communication with the radio on the low-speed CAN bus.

9. Can a DIY enthusiast fix OBDII code U184D in a 2015 GMC Sierra, or is it recommended to seek professional help?

- Depending on your automotive skills and knowledge, you may be able to address simple wiring or connector issues yourself. However, complex problems or electronic repairs may require professional assistance to ensure proper diagnosis and repair.

10. How can I prevent OBDII code U184D from occurring again in my 2015 GMC Sierra after I have repaired the issue?

- To prevent the code from reoccurring, it is important to perform regular maintenance checks, ensure proper installation and connections, and address any related issues promptly to maintain the optimal functionality of the radio and CAN bus system.

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