AutoCodes – GMC – U184D 2017 GMC Sierra

U184D 2017 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 2017 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 298

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 2017 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 2017 GMC Sierra - Lost Communication with Radio on Low Speed CAN Bus - AutoCodes.com — U184D 2017 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 2017 GMC Sierra?

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

How to Fix the DTC U184D 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What does the OBDII code U184D mean on a 2017 GMC Sierra?

The U184D code indicates a loss of communication with the radio on the Low-Speed CAN Bus network, typically due to a fault in the communication system.

2. What are common symptoms of the U184D code?

Symptoms may include the radio not functioning, loss of infotainment features, warning lights on the dashboard, or other electrical issues.

3. What causes the U184D code to appear?

The code can be caused by faulty wiring, a loose or corroded connection, a malfunctioning radio module, or issues with the Low-Speed CAN Bus network.

4. Can a weak battery cause the U184D code?

Yes, a weak or failing battery can lead to communication errors on the CAN Bus, potentially triggering the U184D code.

5. How can I diagnose the U184D code?

Start by inspecting the wiring and connectors related to the radio and CAN Bus network for damage or corrosion. A diagnostic scan tool can also help identify communication faults.

6. Can driving with the U184D code cause further damage?

While it may not directly harm the vehicle, ignoring the code could lead to loss of infotainment functions or mask other communication-related issues.

7. How do I fix the U184D code on my GMC Sierra?

Repairs may involve checking and repairing wiring or connectors, resetting the radio module, or replacing the radio unit if itâ€™s faulty.

8. Is it safe to reset the U184D code without fixing the issue?

Clearing the code without addressing the root cause will likely result in the code returning and may not resolve the underlying problem.

9. How much does it cost to repair the U184D code?

Repair costs can vary depending on the issue, ranging from minor fixes like wiring repairs to more expensive replacements of the radio module or CAN Bus components.

10. Can software updates fix the U184D code?

In some cases, a software update for the radio or vehicleâ€™s control modules may resolve communication issues and clear the U184D code.