AutoCodes – Chevrolet – U0073 2014 Chevrolet Silverado

U0073 2014 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 2014 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 560

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 2014 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 2014 Chevrolet Silverado - Control Module Communication Bus OFF - AutoCodes.com — U0073 2014 Chevrolet Silverado Code - Control Module Communication Bus OFF

What does this mean?

What are the Possible Causes of the DTC U0073 2014 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 2014 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 2014 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 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado Code

1. What does the OBDII code U0073 mean on a 2014 Chevrolet Silverado?

U0073 indicates a problem with the Control Module Communication Bus, meaning the vehicle's modules are unable to communicate properly over the CAN (Controller Area Network) bus.

2. What are the common symptoms of code U0073 in a 2014 Chevy Silverado?

Common symptoms include the check engine light or other warning lights turning on, issues with starting the vehicle, unresponsive systems like ABS or traction control, and possible engine performance problems.

3. What causes the U0073 code to appear in a 2014 Chevrolet Silverado?

The code can be caused by a faulty control module, damaged or corroded wiring, a poor ground connection, or a malfunctioning CAN bus harness.

4. Can a dead battery cause the U0073 code in a 2014 Silverado?

Yes, a weak or dead battery can cause voltage drops that disrupt communication between modules, triggering the U0073 code.

5. How do I diagnose the U0073 code on a 2014 Chevrolet Silverado?

Start by checking the battery and charging system, inspecting the CAN bus wiring for damage or corrosion, and ensuring all module ground connections are secure.

6. Is it safe to drive with the U0073 code on a 2014 Chevy Silverado?

Driving may be unsafe depending on the systems affected. For example, if safety-critical systems like ABS or traction control are impaired, immediate repair is recommended.

7. How do I fix the U0073 code on my 2014 Chevrolet Silverado?

Repairs may include replacing damaged wiring, cleaning corroded connectors, securing ground connections, or reprogramming or replacing a faulty module.

8. Can a U0073 code clear itself on a 2014 Chevrolet Silverado?

In rare cases, the code may clear if the issue is intermittent, such as loose wiring. However, diagnosing the root cause is recommended to prevent recurrence.

9. How much does it cost to repair the U0073 code in a 2014 Chevy Silverado?

Repair costs vary depending on the issue, ranging from $100 for basic wiring repairs to $1,000 or more if a module needs replacement and reprogramming.

10. Can an aftermarket accessory cause the U0073 code in my Silverado?

Yes, improperly installed aftermarket accessories, such as alarms or stereos, can interfere with the CAN bus system and trigger the U0073 code.