AutoCodes – GMC – U007C 2014 GMC Sierra

U007C 2014 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus 2 Off

Quick Answer

The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted. 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: U007C 2014 GMC Sierra indicates Control Module Communication High Speed Extension CAN Bus 2 Off.
Common causes: Common causes include Check for more codes, Faulty Control Module, Control Module harness is open or shorted.
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 262

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 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U007C 2014 GMC Sierra Description

The devices connected to the object high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices when the ignition switch is in any position other than OFF. The object high-speed GMLAN serial data bus uses terminating resistors that are in parallel with the object high speed GMLAN (+) and (-) circuits. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U007C 2014 GMC Sierra - Control Module Communication High Speed Extension CAN Bus 2 Off - AutoCodes.com — U007C 2014 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus 2 Off

What does this mean?

What are the Possible Causes of the DTC U007C 2014 GMC Sierra?

Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U007C 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 U007C 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 U007C 2014 GMC Sierra code?

Need more information on how to fix the U007C 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U007C 2014 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 U007C 2014 GMC Sierra Code

What does the OBDII code U007C mean for my 2014 GMC Sierra?

The U007C code indicates a communication issue with the High-Speed Extension CAN Bus 2, which can affect various control modules in your vehicle.

What symptoms might I experience with the U007C code?

Common symptoms include warning lights on the dashboard, erratic behavior of electronic components, and issues with features like stability control or power steering.

What could cause the U007C code to appear?

Causes can include damaged wiring or connectors in the CAN bus system, faulty control modules, or problems with the vehicleâ€™s electrical system.

Can I drive my 2014 GMC Sierra with the U007C code?

While it may be possible to drive the vehicle, it is not recommended as communication issues can lead to loss of control over important systems.

How can I diagnose the U007C code?

You can start by using an OBDII scanner to confirm the code and check for any additional codes. Inspect the wiring and connectors related to the High-Speed Extension CAN Bus for damage or corrosion.

What are some repair tips for fixing the U007C code?

Inspect and repair any damaged wiring or connectors in the CAN bus system. If the wiring is intact, consider testing or replacing the affected control modules.

Is the U007C code serious?

Yes, it is considered serious because it indicates potential failures in communication between critical control modules, which can affect vehicle safety and performance.

How much might it cost to repair the U007C code?

Repair costs can vary widely, ranging from a few hundred dollars for wiring and connector repairs to over a thousand dollars if control modules need to be replaced.

Can a software update fix the U007C code?

In some cases, a software update to the vehicle's control modules may resolve communication issues. It's best to consult a dealership or qualified mechanic to determine if this is applicable.