AutoCodes – Chevrolet – U007C 2014 Chevrolet Silverado

U007C 2014 Chevrolet Silverado 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 Chevrolet Silverado 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 195

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 Chevrolet Silverado 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 Chevrolet Silverado - Control Module Communication High Speed Extension CAN Bus 2 Off - AutoCodes.com — U007C 2014 Chevrolet Silverado 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 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 Chevrolet Silverado code?

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

Need Help with the Code?

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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 U007C 2014 Chevrolet Silverado Code

1. What does the OBDII code U007C mean on a 2014 Chevrolet Silverado?

U007C indicates a communication issue on the High-Speed CAN Bus 2, where a control module is unable to communicate properly.

2. What are common symptoms of code U007C on a 2014 Chevy Silverado?

Symptoms may include warning lights on the dashboard (e.g., check engine light), erratic transmission behavior, loss of communication with certain modules, or vehicle performance issues.

3. What causes the U007C code to appear?

Common causes include damaged wiring, loose or corroded CAN Bus connections, a malfunctioning control module, or a blown fuse related to the CAN Bus system.

4. How do I diagnose the U007C code on my Silverado?

Start by inspecting the wiring and connectors for damage or corrosion, checking for blown fuses, and using a scan tool to identify any additional related codes.

5. Can a weak battery cause the U007C code?

Yes, a weak or failing battery can disrupt communication between control modules and trigger the U007C code.

6. How do I fix the U007C code on my 2014 Chevrolet Silverado?

Repairs may include fixing or replacing damaged wiring, cleaning or securing loose connections, replacing a blown fuse, or reprogramming or replacing a faulty control module.

7. Is it safe to drive with the U007C code active?

It depends on the severity of the issue. If the communication failure affects critical systems like the transmission or braking, it may not be safe to drive.

8. Which control modules are affected by the U007C code?

The specific modules affected will vary, but it typically involves those connected to the High-Speed CAN Bus 2, such as the Engine Control Module (ECM) or Transmission Control Module (TCM).

9. How much does it cost to fix the U007C code?

Repair costs vary depending on the issue. Simple fixes like repairing wiring or replacing a fuse could cost under $100, while replacing a control module may cost several hundred dollars or more.

10. Can a DIYer fix the U007C code on a 2014 Silverado?

If the issue is minor, such as a loose connection or blown fuse, a DIYer with basic tools and knowledge may be able to fix it. For complex issues like module replacement or reprogramming, professional assistance is recommended.