AutoCodes – GMC – U007D 2018 GMC Sierra

U007D 2018 GMC Sierra Code - Control Module Communication Low 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: U007D 2018 GMC Sierra indicates Control Module Communication Low 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 187

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 U007D 2018 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 U007D 2018 GMC Sierra - Control Module Communication Low Speed Extension CAN Bus Off - AutoCodes.com — U007D 2018 GMC Sierra Code - Control Module Communication Low Speed Extension CAN Bus Off

What does this mean?

What are the Possible Causes of the DTC U007D 2018 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 U007D 2018 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 U007D 2018 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 U007D 2018 GMC Sierra code?

Need more information on how to fix the U007D 2018 GMC Sierra 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 U007D 2018 GMC Sierra Code

1. What does the OBDII code U007D mean on a 2018 GMC Sierra?

The U007D code indicates a communication issue on the Low-Speed CAN bus, where a control module has gone "bus off" and is unable to communicate with other modules.

2. What are the symptoms of the U007D code in a 2018 GMC Sierra?

Common symptoms include warning lights on the dashboard, such as the check engine light, malfunctioning electronic features, or intermittent or complete loss of communication with certain vehicle systems.

3. What causes the U007D code on a 2018 GMC Sierra?

Potential causes include damaged or corroded wiring, a faulty control module, a poor connection in the CAN bus network, or a short circuit in the communication lines.

4. Can I drive my 2018 GMC Sierra with the U007D code active?

It depends on the severity of the issue. If critical systems like braking or steering are affected, itâ€™s unsafe to drive. Otherwise, the vehicle may still operate but with limited functionality.

5. How do I diagnose the U007D code on a 2018 GMC Sierra?

Start by inspecting the wiring and connectors for damage or corrosion. Use a scan tool to check for additional codes and verify communication between control modules.

6. Can a low battery cause the U007D code in a 2018 GMC Sierra?

Yes, a weak or discharged battery can lead to communication issues on the CAN bus, potentially triggering the U007D code.

7. What repairs are typically needed for the U007D code on a 2018 GMC Sierra?

Repairs may include fixing or replacing damaged wiring, cleaning corroded connectors, reprogramming or replacing a faulty module, or addressing electrical shorts.

8. How much does it cost to fix the U007D code on a 2018 GMC Sierra?

Repair costs vary depending on the root cause but can range from $100 for minor wiring repairs to $1,000 or more if a control module needs replacement.

9. Can the U007D code on a 2018 GMC Sierra clear itself?

The code may clear temporarily if the issue is intermittent, but it will likely return unless the underlying problem is repaired.

10. What tools are needed to troubleshoot the U007D code on a 2018 GMC Sierra?

A professional-grade OBDII scanner capable of reading CAN bus data, a multimeter for checking voltage and continuity, and wiring diagrams for the vehicle are essential tools.