AutoCodes – GMC – U184C 2014 GMC Sierra

U184C 2014 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 2014 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 243

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 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 U184C 2014 GMC Sierra - Lost Communication with Instrument Cluster on Low Speed CAN Bus - AutoCodes.com — U184C 2014 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 2014 GMC Sierra?

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

How to Fix the DTC U184C 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 U184C 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 U184C 2014 GMC Sierra code?

Need more information on how to fix the U184C 2014 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 2014 GMC Sierra Code

1. What does the OBDII code U184C mean on a 2014 GMC Sierra?

The U184C code indicates a lost communication with the instrument cluster on the low-speed CAN bus.

2. What are the common symptoms of a U184C code in a 2014 GMC Sierra?

Common symptoms include issues with the instrument cluster display, warning lights illuminating unexpectedly, and potential loss of certain vehicle functions.

3. What are some possible causes of the U184C code in a 2014 GMC Sierra?

Potential causes may include a faulty instrument cluster, damaged wiring or connectors in the CAN bus system, a malfunctioning control module, or software issues.

4. How can I diagnose the U184C code on my 2014 GMC Sierra?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific error code, checking the instrument cluster connections, inspecting the wiring for damage, and testing the control modules involved.

5. Can I drive my 2014 GMC Sierra with a U184C trouble code?

It is generally not recommended to drive the vehicle with unresolved communication issues between the instrument cluster and the CAN bus system, as it may lead to safety concerns or further damage.

6. How can I repair a U184C code on my 2014 GMC Sierra?

Repair steps may involve repairing or replacing damaged wiring, ensuring proper connections in the CAN bus system, resetting or reprogramming control modules, or replacing the instrument cluster if necessary.

7. Is it possible to reset the U184C code on a 2014 GMC Sierra without repairs?

While clearing the error code may temporarily turn off the warning light, it is essential to address the root cause of the communication issue to prevent the code from reappearing.

8. Can a DIY enthusiast fix the U184C code in a 2014 GMC Sierra?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair simple wiring issues related to the U184C code. However, complex repairs may require professional assistance.

9. Are there any recalls or technical service bulletins related to the U184C code in a 2014 GMC Sierra?

It is advisable to check with a GMC dealership or refer to the manufacturer's website for any relevant recalls or technical service bulletins addressing the U184C trouble code in the 2014 Sierra model.

10. How can I prevent the U184C code from appearing again on my 2014 GMC Sierra?

Regular maintenance, avoiding electrical system modifications, and promptly addressing any warning lights or unusual vehicle behaviors can help prevent issues like the U184C code from occurring in the future.