U0073 2015 GMC Sierra Code - Control Module Communication Bus OFF
Quick Answer
Modules connected to the high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Module/Device that is not communicating, Module/Device harness is open or shorted, Module/Device circuit poor electrical connection. 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
- U0073 2015 GMC Sierra indicates Control Module Communication Bus OFF.
- Common causes
- Common causes include Faulty Module/Device that is not communicating, Module/Device harness is open or shorted, Module/Device circuit poor electrical connection.
- 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 U0073 2015 GMC Sierra Description
What are the Possible Causes of the DTC U0073 2015 GMC Sierra?
- Faulty Module/Device that is not communicating
- Module/Device harness is open or shorted
- Module/Device circuit poor electrical connection
How to Fix the DTC U0073 2015 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 U0073 2015 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.
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Frequently Asked Questions about U0073 2015 GMC Sierra Code
1. What does the OBDII code U0073 mean on a 2015 GMC Sierra?
The U0073 code indicates a communication issue on the Controller Area Network (CAN) bus, meaning one or more modules are unable to communicate properly.
2. What are the common symptoms of the U0073 code in a 2015 GMC Sierra?
Symptoms may include a check engine light, erratic vehicle behavior, unresponsive systems like ABS or traction control, and intermittent starting issues.
3. What causes the U0073 code to appear on a 2015 GMC Sierra?
Common causes include a faulty control module, damaged wiring or connectors in the CAN bus, low battery voltage, or a malfunctioning CAN bus network.
4. Can a weak battery trigger the U0073 code on a 2015 GMC Sierra?
Yes, a weak or failing battery can cause insufficient voltage, disrupting communication between modules and triggering the U0073 code.
5. How do I diagnose the U0073 code on a 2015 GMC Sierra?
Start by checking the battery voltage and condition, inspect CAN bus wiring and connectors for damage, and use a scan tool to identify which module is not communicating.
6. Is it safe to drive a 2015 GMC Sierra with the U0073 code?
It depends on the severity of the issue. While the vehicle may still operate, compromised communication between modules can lead to erratic or unsafe vehicle behavior.
7. How can I fix the U0073 code on my 2015 GMC Sierra?
Repairs may include replacing a faulty control module, repairing damaged CAN bus wiring, cleaning or reconnecting loose connectors, or ensuring the battery is fully charged.
8. How much does it cost to repair the U0073 code on a 2015 GMC Sierra?
Repair costs vary based on the issue, ranging from $50 for simple wiring repairs to $500 or more for module replacement and reprogramming.
9. Can a software update resolve the U0073 code on a 2015 GMC Sierra?
In some cases, a software update for the control modules may fix communication issues, but this should be done after physical inspections.
10. What tools are needed to troubleshoot the U0073 code on a 2015 GMC Sierra?
You’ll need a multimeter to check wiring, a scan tool with CAN bus diagnostics, and potentially a battery tester to rule out voltage issues.
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