AutoCodes – GMC – U007B 2016 GMC Sierra

U007B 2016 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus 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: U007B 2016 GMC Sierra indicates Control Module Communication High Speed Extension CAN Bus 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 166

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 U007B 2016 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 U007B 2016 GMC Sierra - Control Module Communication High Speed Extension CAN Bus Off - AutoCodes.com — U007B 2016 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U007B 2016 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 U007B 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 U007B 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 U007B 2016 GMC Sierra code?

Need more information on how to fix the U007B 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U007B 2016 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 U007B 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code U007B in a 2016 GMC Sierra?

The common symptoms include issues with the vehicle's communication system, such as intermittent or complete loss of communication with various control modules.

2. What does the OBDII code U007B mean for a 2016 GMC Sierra?

The code U007B indicates a problem with the Control Module Communication High Speed Extension CAN Bus Off in the vehicle.

3. What are the possible causes of OBDII code U007B in a 2016 GMC Sierra?

Possible causes include faulty wiring or connections in the high-speed CAN bus network, issues with control modules, or a malfunction in the vehicle's communication system.

4. How can I diagnose the OBDII code U007B in my 2016 GMC Sierra?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault codes, checking the wiring and connections in the high-speed CAN bus network, and inspecting the control modules for any signs of damage.

5. Can I drive my 2016 GMC Sierra with the OBDII code U007B present?

It is not recommended to drive the vehicle with this code present, as it can lead to communication errors between critical control modules, potentially affecting the vehicle's performance and safety.

6. How can I repair OBDII code U007B in my 2016 GMC Sierra?

Repairing this code may involve fixing any wiring or connection issues in the high-speed CAN bus network, replacing faulty control modules, or reprogramming the vehicle's communication system as needed.

7. Is it safe to clear the OBDII code U007B in my 2016 GMC Sierra with a scanner?

Clearing the code with a scanner is safe after conducting the necessary repairs to address the underlying issue causing the code. However, if the problem persists, the code may reappear.

8. Can a DIY enthusiast fix OBDII code U007B in a 2016 GMC Sierra?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing this code may require specialized tools and expertise, so it is recommended to consult a professional technician.

9. How much does it cost to repair OBDII code U007B in a 2016 GMC Sierra?

The cost of repair can vary depending on the root cause of the issue, the need for replacement parts, and labor charges. It is advisable to get a diagnostic from a qualified mechanic for an accurate estimate.

10. Will OBDII code U007B in a 2016 GMC Sierra affect the vehicle's fuel efficiency?

In some cases, the code U007B can lead to communication errors that may impact the vehicle's performance, potentially affecting fuel efficiency. It's essential to address the issue promptly to avoid any adverse effects on fuel economy.