AutoCodes – GMC – U184C 2015 GMC Sierra

U184C 2015 GMC Sierra Code - Lost Communication with Instrument Cluster 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 Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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: U184C 2015 GMC Sierra indicates Lost Communication with Instrument Cluster on Low Speed CAN Bus.
Common causes: Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 249

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U184C 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 U184C 2015 GMC Sierra - Lost Communication with Instrument Cluster on Low Speed CAN Bus - AutoCodes.com — U184C 2015 GMC Sierra Code - Lost Communication with Instrument Cluster on Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U184C 2015 GMC Sierra?

Faulty Instrument Cluster
Instrument Cluster harness is open or shorted
Instrument Cluster circuit poor electrical connection

How to Fix the DTC U184C 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 U184C 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 U184C 2015 GMC Sierra code?

Need more information on how to fix the U184C 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U184C 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 U184C 2015 GMC Sierra Code

1. What are common symptoms of OBDII code U184C in a 2015 GMC Sierra?

The common symptoms of code U184C include loss of communication with the instrument cluster on the low-speed Controller Area Network (CAN) bus, resulting in malfunctioning gauges, warning lights, and other instrument cluster functions.

2. What can cause the OBDII code U184C in a 2015 GMC Sierra?

The U184C code in a 2015 GMC Sierra is typically triggered by a fault in the low-speed CAN bus communication network, which may be caused by issues such as wiring faults, loose connections, or a malfunctioning instrument cluster module.

3. How can I diagnose the OBDII code U184C in my 2015 GMC Sierra?

Diagnosing code U184C involves using an OBDII scanner to retrieve the code and then performing a thorough inspection of the low-speed CAN bus network, checking for any wiring faults, loose connections, or issues with the instrument cluster module.

4. What are some repair tips for fixing the U184C code in a 2015 GMC Sierra?

Repairing the U184C code may involve repairing or replacing damaged wiring, ensuring all connections are secure, and checking the instrument cluster module for any issues. Clearing the code after the repairs are made is essential to see if the issue has been resolved.

5. Can I drive my 2015 GMC Sierra with the U184C trouble code?

It is not recommended to drive your GMC Sierra with an active U184C trouble code, as it indicates a loss of communication with the instrument cluster, which can affect important vehicle functions and safety systems. Prompt diagnosis and repair are advised.

6. How much does it cost to fix the U184C code in a 2015 GMC Sierra?

The cost of fixing the U184C code in a 2015 GMC Sierra can vary depending on the underlying cause of the issue. It may range from a simple repair of wiring or connections to replacing the instrument cluster module, so it's best to consult a professional for an accurate estimate.

7. Is the U184C code in a 2015 GMC Sierra a common issue?

While the U184C code specifically related to "Lost Communication with Instrument Cluster on Low Speed CAN Bus" may not be extremely common, communication network issues in vehicles, in general, can occur due to various factors, making it important to address them promptly.

8. Can a DIY enthusiast fix the U184C code in a 2015 GMC Sierra?

Depending on the DIYer's skill level and access to tools, diagnosing and repairing the U184C code may be possible. However, due to the complexity of CAN bus networks and instrument cluster systems, it's recommended to seek professional assistance for an accurate and effective repair.

9. Will disconnecting the battery reset the U184C trouble code in a 2015 GMC Sierra?

Disconnecting the battery may reset the trouble code temporarily, but if the underlying issue causing the U184C code is not addressed and repaired, the code is likely to reappear after driving the vehicle for a certain period of time.

10. How can I prevent the U184C trouble code from appearing in my 2015 GMC Sierra in the future?

Regular maintenance and inspections of the vehicle's communication networks, including the CAN bus system and instrument cluster, can help prevent issues like the U184C trouble code. Ensuring proper wiring connections and addressing any warning signs promptly can also help prevent future occurrences.