AutoCodes – GMC – U184D 2015 GMC Sierra

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

Quick Answer

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Common causes include Faulty Radio, Radio harness is open or shorted, Radio 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: U184D 2015 GMC Sierra indicates Lost Communication with Radio on Low Speed CAN Bus.
Common causes: Common causes include Faulty Radio, Radio harness is open or shorted, Radio 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.

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Code Popularity 214

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 Jul 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U184D 2015 GMC Sierra Description

The serial data circuit is the means by which the devices in the vehicle communicate with each other. Once the scan tool is connected to the serial data circuit through the Data Link Connector (DLC), the scan tool can be used to monitor each device for diagnostic purposes and to check for Diagnostic Trouble Codes (DTC). When the vehicle is ON, each device communicating on the serial data circuit sends a state of health message to ensure that the device is operating properly. When a device stops communicating on the serial data circuit, for example, if the device loses power or ground, the state of health message it normally sends on the serial data circuit disappears. Other devices on the serial data circuit, which expect to receive that state of health message, detect its absence; those devices in turn set a DTC associated with the loss of state of health of the non-communicating device. A loss of serial data communications DTC does not represent a failure of the devices that contain the stored DTC.

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

What does this mean?

What are the Possible Causes of the DTC U184D 2015 GMC Sierra?

Faulty Radio
Radio harness is open or shorted
Radio circuit poor electrical connection

How to Fix the DTC U184D 2015 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 U184D 2015 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 U184D 2015 GMC Sierra code?

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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.