AutoCodes – GMC – U184D 2014 GMC Sierra

U184D 2014 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 2014 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 191

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 2014 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 2014 GMC Sierra - Lost Communication with Radio on Low Speed CAN Bus - AutoCodes.com — U184D 2014 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 2014 GMC Sierra?

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

How to Fix the DTC U184D 2014 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 2014 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 2014 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 2014 GMC Sierra Code

1. What does the OBDII code U184D on a 2014 GMC Sierra mean?

The code U184D indicates a "Lost Communication with Radio on Low Speed CAN Bus" error in the vehicle's onboard diagnostics system.

2. What are some common symptoms of the U184D code in a 2014 GMC Sierra?

Common symptoms include the radio not working, issues with other vehicle systems that rely on communication with the radio, and potentially a check engine light being illuminated.

3. What are possible causes of the U184D code in a 2014 GMC Sierra?

Possible causes include a faulty radio unit, damaged wiring or connectors in the CAN Bus network, a software glitch, or a communication breakdown between the radio and other modules in the vehicle.

4. How can I diagnose the U184D code in my 2014 GMC Sierra?

Diagnosing the U184D code typically involves checking the connections and wiring related to the radio and CAN Bus network, testing the radio unit itself, and using a diagnostic tool to scan for communication errors between modules.

5. Can I still drive my 2014 GMC Sierra with the U184D code present?

In most cases, it is safe to drive the vehicle with the U184D code, especially if there are no other noticeable issues affecting the vehicle's performance. However, it is recommended to address the underlying problem as soon as possible.

6. How can I repair the U184D code in my 2014 GMC Sierra?

Repairing the U184D code may involve repairing or replacing the radio unit, fixing any damaged wiring or connectors, updating software if needed, or resetting the communication network between modules.

7. Is it possible to reset the U184D code in a 2014 GMC Sierra without fixing the underlying issue?

While clearing the error code temporarily with an OBDII scanner is possible, the code will likely reappear until the root cause of the communication problem is addressed.

8. Are there any recalls or technical service bulletins related to the U184D code in a 2014 GMC Sierra?

It is recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or technical service bulletins related to the U184D code in your specific vehicle.

9. Can extreme weather conditions or battery issues trigger the U184D code in a 2014 GMC Sierra?

Extreme weather conditions or battery issues can potentially cause communication problems that trigger the U184D code. It is essential to check the vehicle's electrical system and connections in such situations.

10. How can I prevent the U184D code from reoccurring in my 2014 GMC Sierra?

Regular maintenance, checking the vehicle's electrical connections, avoiding water damage to the radio unit, and keeping the software up to date can help prevent the U184D code from reoccurring in your 2014 GMC Sierra.