AutoCodes – GMC – U0073 2016 GMC Sierra

U0073 2016 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 2016 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.

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Code Popularity 405

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 19, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0073 2016 GMC Sierra Description

Modules connected to the 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 modules. The modules have prerecorded information about what messages need to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) will be set when the device setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 s.

OBDII Code U0073 2016 GMC Sierra - Control Module Communication Bus OFF - AutoCodes.com — U0073 2016 GMC Sierra Code - Control Module Communication Bus OFF

What does this mean?

What are the Possible Causes of the DTC U0073 2016 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 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 U0073 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 U0073 2016 GMC Sierra 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 U0073 2016 GMC Sierra Code

1. What does the OBDII code U0073 for a 2016 GMC Sierra mean?

The code U0073 indicates a communication bus off error related to the control module in the vehicle.

2. What are the common symptoms of U0073 in a 2016 GMC Sierra?

Common symptoms include issues with the vehicle's communication systems, such as the loss of communication between various control modules.

3. What are the possible causes of the U0073 code in a 2016 GMC Sierra?

Possible causes may include faulty wiring or connections, a defective control module, a software glitch, or problems with the vehicle's network communication.

4. How can I diagnose the U0073 code in a 2016 GMC Sierra?

Diagnosing the U0073 code typically involves using a diagnostic scanner to retrieve the code, checking the network communication of the control modules, and inspecting the wiring and connections for any issues.

5. Can I drive my 2016 GMC Sierra with the U0073 code present?

It is not recommended to drive the vehicle with the U0073 code present, as it may lead to further communication issues between control modules and potentially affect the vehicle's performance.

6. How can I repair the U0073 code in a 2016 GMC Sierra?

Repairing the U0073 code may involve checking and repairing any faulty wiring or connections, replacing the defective control module, updating software if necessary, and ensuring proper communication between control modules.

7. Can a DIY enthusiast fix the U0073 code in a 2016 GMC Sierra?

While some simple checks like inspecting wiring connections can be done by a DIY enthusiast, diagnosing and repairing the U0073 code may require professional help due to the complexity of the vehicle's communication systems.

8. Are there any recalls related to the U0073 code in a 2016 GMC Sierra?

Recalls related to the U0073 code in a 2016 GMC Sierra can vary, so it's recommended to check with the manufacturer or a dealership to see if there are any relevant recalls for your specific vehicle.

9. Will resetting the OBDII system clear the U0073 code in a 2016 GMC Sierra?

Resetting the OBDII system may temporarily clear the U0073 code, but if the underlying issue causing the code is not addressed, it is likely to reappear after driving the vehicle for some time.

10. How much does it cost to repair the U0073 code in a 2016 GMC Sierra?

The cost of repairing the U0073 code can vary depending on the specific underlying issue. It is recommended to get a diagnostic from a qualified mechanic to determine the exact repair cost for your vehicle.