U007B GMC 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 GMC 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.
Code U007B GMC Description
What are the Possible Causes of the DTC U007B GMC?
- 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 GMC?
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 GMC 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.
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Information for Specific GMC Models
- U007B 2014 GMC Sierra — Control Module Communication High Speed Extension CAN Bus Off
- U007B 2015 GMC Sierra — Control Module Communication High Speed Extension CAN Bus Off
- U007B 2016 GMC Sierra — Control Module Communication High Speed Extension CAN Bus Off
- U007B 2017 GMC Sierra — Control Module Communication High Speed Extension CAN Bus Off
- U007B 2018 GMC Sierra — Control Module Communication High Speed Extension CAN Bus Off
Frequently Asked Questions about U007B GMC Code
1. What are the common symptoms of OBDII code U007B in a GMC vehicle?
The common symptoms of OBDII code U007B include issues with the vehicle's communication system, such as intermittent or complete loss of communication with various control modules.
2. What can cause the OBDII code U007B in a GMC vehicle?
The OBDII code U007B in a GMC vehicle is usually caused by a high-speed communication bus fault, which can be due to issues with wiring, connectors, control modules, or the network itself.
3. How can I diagnose the OBDII code U007B in my GMC vehicle?
Diagnosing the OBDII code U007B typically involves using a professional diagnostic scanner to check for communication faults and inspecting the wiring and connectors for any signs of damage or corrosion.
4. Can I drive my GMC vehicle with the OBDII code U007B present?
It is not recommended to drive your GMC vehicle with the OBDII code U007B present, as it can lead to further communication issues between control modules and potentially affect the vehicle's performance and safety.
5. How can I repair the OBDII code U007B in my GMC vehicle?
Repairing the OBDII code U007B in a GMC vehicle may involve repairing or replacing damaged wiring, connectors, or control modules related to the high-speed communication bus to restore proper communication.
6. Are there any DIY tips for fixing the OBDII code U007B in a GMC vehicle?
While some basic inspections and connector cleanings can be done by DIY enthusiasts, diagnosing and repairing the OBDII code U007B usually requires professional diagnostic equipment and expertise.
7. Is the OBDII code U007B in a GMC vehicle a serious issue?
The OBDII code U007B in a GMC vehicle should be addressed promptly, as it indicates a fault in the communication system that can affect the vehicle's operation and potentially lead to more severe issues if left unresolved.
8. Can a faulty battery or alternator cause the OBDII code U007B in a GMC vehicle?
A faulty battery or alternator can sometimes cause communication issues in a vehicle, but they are less likely to trigger the specific OBDII code U007B related to high-speed communication bus faults.
9. How long does it take to repair the OBDII code U007B in a GMC vehicle?
The time required to repair the OBDII code U007B in a GMC vehicle can vary depending on the extent of the issue and the availability of parts, but it typically takes a few hours to a full day at a professional repair shop.
10. Is it necessary to reset the OBDII code U007B after repairing the issue in a GMC vehicle?
After repairing the issue causing the OBDII code U007B in a GMC vehicle, it is recommended to clear the code using a diagnostic scanner to reset the system and ensure that the repair was successful.
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