AutoCodes – GMC – U184C 2017 GMC Sierra

U184C 2017 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 2017 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 190

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 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 U184C 2017 GMC Sierra - Lost Communication with Instrument Cluster on Low Speed CAN Bus - AutoCodes.com — U184C 2017 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 2017 GMC Sierra?

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

How to Fix the DTC U184C 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 U184C 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 U184C 2017 GMC Sierra code?

Need more information on how to fix the U184C 2017 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 2017 GMC Sierra Code

1. What does the OBDII code U184C on a 2017 GMC Sierra mean?

The U184C code indicates a communication error with the instrument cluster on the low-speed CAN bus in your GMC Sierra.

2. What are some common symptoms of the U184C code in a 2017 GMC Sierra?

Common symptoms may include the instrument cluster not working properly, warning lights coming on, or gauges not functioning correctly.

3. What are some possible causes of the U184C code in a 2017 GMC Sierra?

Potential causes of the U184C code include loose or damaged wiring, a faulty instrument cluster module, or a problem with the CAN bus communication network.

4. How can I diagnose the U184C code in my 2017 GMC Sierra?

Diagnosis typically involves checking the wiring connections to the instrument cluster, inspecting for any visible damage, and using a diagnostic tool to scan the vehicle's computer for trouble codes.

5. Can I still drive my 2017 GMC Sierra with the U184C code?

It is not recommended to drive your vehicle with the U184C code present, as it can affect the proper functioning of critical systems like the instrument cluster and may lead to further issues.

6. How can I repair the U184C code in my 2017 GMC Sierra?

Repairing the U184C code may involve fixing any damaged wiring, replacing the instrument cluster module if necessary, or addressing any communication network issues with the help of a professional mechanic.

7. Is the U184C code a serious issue in a 2017 GMC Sierra?

While the U184C code itself may not be a serious issue, it can lead to other problems if left unaddressed, so it's important to diagnose and repair the underlying cause promptly.

8. Can I reset the U184C code in my 2017 GMC Sierra myself?

You can attempt to clear the code with an OBDII scanner, but it's important to first diagnose and address the root cause of the issue to prevent the code from reoccurring.

9. How much does it cost to fix the U184C code in a 2017 GMC Sierra?

The cost of fixing the U184C code can vary depending on the underlying cause and the specific repairs needed, so it's best to consult with a mechanic for an accurate estimate.

10. Will the U184C code cause my 2017 GMC Sierra to fail an emissions test?

The U184C code may cause your GMC Sierra to fail an emissions test, as it indicates a problem with the vehicle's communication system that can impact emissions-related functions. It's advisable to address the issue before undergoing an emissions test.