U007C 2017 GMC Sierra Code - Control Module Communication High Speed Extension CAN Bus 2 Off
Quick Answer
The U007C diagnostic trouble code for a 2017 GMC Sierra indicates a problem with the Control Module Communication High Speed Extension CAN Bus 2. Common causes include Faulty control module, Wiring harness issues, Software glitches. 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 2017 GMC Sierra indicates Control Module Communication High Speed Extension CAN Bus 2 Off.
- Common causes
- Common causes include Faulty control module, Wiring harness issues, Software glitches.
- 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 U007C 2017 GMC Sierra Description
The U007C diagnostic trouble code for a 2017 GMC Sierra indicates a problem with the Control Module Communication High Speed Extension CAN Bus 2. This code suggests that there is a communication issue within the vehicle's network, specifically on the high-speed CAN Bus 2. The CAN (Controller Area Network) Bus is a communication protocol used in modern vehicles for various modules and control units to exchange information.
Common Causes of U007C 2017 GMC Sierra
- Faulty control module
- Wiring harness issues
- Software glitches
- Malfunctioning CAN Bus network
- Water damage or corrosion in connectors
Symptoms of U007C 2017 GMC Sierra
- Check engine light illuminated
- Loss of communication with certain control modules
- Erratic behavior of electronic systems
- Poor engine performance
- Transmission shifting issues
How to Fix U007C 2017 GMC Sierra
- Diagnose the specific cause of the communication issue using a scan tool.
- Check the wiring harness for any damage or loose connections.
- Inspect the control modules connected to the CAN Bus 2 for faults.
- Update software or firmware in the affected modules if necessary.
- Clear the code and perform a test drive to ensure the issue has been resolved.
Cost to Fix U007C 2017 GMC Sierra
The typical repair costs for addressing the Control Module Communication High Speed Extension CAN Bus 2 Off code can vary depending on the specific cause of the issue. On average, you can expect to pay between $200 and $500 for parts and labor. However, it's important to note that diagnostic time and labor rates can vary between auto repair shops, so it's advisable to check local rates for a more accurate estimate.
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Frequently Asked Questions about U007C 2017 GMC Sierra Code
1. What does the OBDII code U007C mean on a 2017 GMC Sierra?
The U007C code indicates a communication issue on the high-speed CAN Bus 2 network, specifically that the communication is off or disrupted.
2. What are the common symptoms of code U007C on a GMC Sierra?
Symptoms may include warning lights on the dashboard, loss of communication with certain modules, intermittent electrical issues, or even failure of certain vehicle systems like ABS or traction control.
3. What causes the U007C code to appear?
Common causes include damaged wiring or connectors in the CAN Bus 2 network, a malfunctioning control module, a short or open circuit, or a failed communication module.
4. Can the U007C code cause drivability issues?
Yes, depending on the affected systems, it may lead to reduced functionality or complete failure of safety or performance features such as ABS, stability control, or powertrain management.
5. How do I diagnose the U007C code on my 2017 GMC Sierra?
Start by scanning all modules for additional codes, visually inspecting CAN Bus wiring and connectors, and testing for continuity and resistance in the CAN Bus 2 circuit.
6. Is it safe to drive with the U007C code active?
It may not be safe, as the code can impact critical vehicle systems. Addressing the issue promptly is recommended to avoid further problems.
7. How can I fix the U007C code on my GMC Sierra?
Repairs may include cleaning or reconnecting wiring harnesses, repairing damaged wires, replacing faulty connectors, or replacing a malfunctioning control module.
8. Which modules are typically affected by the U007C code?
Modules such as the Engine Control Module (ECM), Transmission Control Module (TCM), or Body Control Module (BCM) may lose communication on the CAN Bus 2 network.
9. Can a low battery cause the U007C code on a 2017 GMC Sierra?
Yes, a weak or low battery can cause voltage fluctuations that disrupt communication on the CAN Bus network, triggering the U007C code.
10. Do I need a professional mechanic to fix the U007C code?
While some basic checks like inspecting wiring can be done at home, diagnosing and repairing CAN Bus issues often require specialized tools and expertise, so consulting a professional is advisable.
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