AutoCodes – Chevrolet – U0073 2015 Chevrolet Silverado

U0073 2015 Chevrolet Silverado 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 Chevrolet Silverado 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 741

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado - Control Module Communication Bus OFF - AutoCodes.com — U0073 2015 Chevrolet Silverado Code - Control Module Communication Bus OFF

What does this mean?

What are the Possible Causes of the DTC U0073 2015 Chevrolet Silverado?

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 Chevrolet Silverado?

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 Chevrolet Silverado 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 2015 Chevrolet Silverado code?

Need more information on how to fix the U0073 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2015 Chevrolet Silverado Code

1. What does the OBDII code U0073 on a 2015 Chevrolet Silverado mean?

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

2. What are the common symptoms of the U0073 code in a 2015 Chevrolet Silverado?

Common symptoms include intermittent or total loss of communication between various control modules, resulting in issues like loss of power steering, malfunctioning gauges, and warning lights on the dashboard.

3. What are the possible causes of the U0073 code on a 2015 Chevrolet Silverado?

Potential causes of the U0073 code include faulty wiring or connectors, a defective control module, a blown fuse, or a software glitch in the vehicle's electronic control system.

4. How can I diagnose the U0073 code on my 2015 Chevrolet Silverado?

Diagnosing the U0073 code typically involves using a diagnostic scanner to retrieve the specific control module that is not communicating, checking the wiring and connectors for damage, and testing the control modules for proper operation.

5. How can I repair the U0073 code on my 2015 Chevrolet Silverado?

Repairing the U0073 code may involve repairing or replacing damaged wiring or connectors, replacing the faulty control module, resetting the affected module, or updating the vehicle's software with the latest manufacturer updates.

6. Is it safe to drive my 2015 Chevrolet Silverado with the U0073 code present?

It is not recommended to drive your vehicle with the U0073 code present, as it can lead to unpredictable behavior and potential safety hazards due to communication issues between critical control modules.

7. Can the U0073 code on a 2015 Chevrolet Silverado be cleared/reset?

Yes, the U0073 code can be cleared/reset using a diagnostic scanner after the underlying issue has been diagnosed and repaired.

8. Will the U0073 code on a 2015 Chevrolet Silverado cause the vehicle to fail an emissions test?

Yes, the U0073 code can cause the vehicle to fail an emissions test due to the malfunctioning control module communication, which can impact the vehicle's emissions control system.

9. How much does it typically cost to repair the U0073 code on a 2015 Chevrolet Silverado?

The cost of repairing the U0073 code can vary depending on the underlying cause and the extent of the repairs needed, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can I prevent the U0073 code from appearing on my 2015 Chevrolet Silverado in the future?

Regular vehicle maintenance, including checking the wiring and connectors for signs of wear, updating control module software as recommended by the manufacturer, and addressing any warning lights promptly, can help prevent the U0073 code from reoccurring.