AutoCodes – GMC – U184C 2016 GMC Sierra

U184C 2016 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 2016 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.

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Code Popularity 196

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 U184C 2016 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 2016 GMC Sierra - Lost Communication with Instrument Cluster on Low Speed CAN Bus - AutoCodes.com — U184C 2016 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 2016 GMC Sierra?

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

How to Fix the DTC U184C 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the U184C 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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 U184C 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code U184C in a 2016 GMC Sierra?

- Common symptoms include loss of communication with the instrument cluster, malfunctioning gauges, warning lights on the dashboard, and issues with vehicle information display.

2. What does the OBDII code U184C indicate in a 2016 GMC Sierra?

- The code U184C indicates a communication error on the Low Speed Controller Area Network (CAN) bus with the instrument cluster module.

3. What are the possible causes of the U184C code in a 2016 GMC Sierra?

- Possible causes include a faulty instrument cluster module, damaged wiring or connectors in the CAN bus circuit, software issues, or a problem with the power or ground supply to the instrument cluster.

4. How can I diagnose the U184C code in my 2016 GMC Sierra?

- Diagnosis involves checking the wiring and connectors for damage, testing the instrument cluster module, inspecting the power and ground connections, and using a scan tool to communicate with the module.

5. Can a DIY enthusiast repair the U184C code in a 2016 GMC Sierra?

- DIY repairs are possible if you have the necessary tools and knowledge. However, diagnosing and fixing communication issues in the CAN bus system may require advanced troubleshooting skills.

6. Is it safe to drive my 2016 GMC Sierra with the U184C code present?

- It is not recommended to drive the vehicle with the U184C code active, as it can lead to inaccurate instrument readings, potential safety hazards, and further damage to the vehicle's systems.

7. How much does it typically cost to repair the U184C code in a 2016 GMC Sierra?

- The cost of repair can vary depending on the underlying cause. It may involve replacing the instrument cluster module, repairing damaged wiring, or addressing other issues, with costs ranging from a few hundred to over a thousand dollars.

8. Can resetting the OBDII code U184C in a 2016 GMC Sierra fix the issue temporarily?

- Resetting the code may temporarily clear the warning lights, but it will not fix the underlying problem causing the communication issue with the instrument cluster module.

9. Will the U184C code in a 2016 GMC Sierra cause the vehicle to fail an emissions test?

- The U184C code itself may not directly cause the vehicle to fail an emissions test, but it indicates a problem that needs to be addressed to ensure the vehicle's systems are functioning properly.

10. How long does it typically take to repair the U184C code in a 2016 GMC Sierra?

- The repair time can vary based on the specific cause of the code and the complexity of the issue. Simple fixes may take a few hours, while more involved repairs could require a day or more.