AutoCodes – Chevrolet – U0020 2014 Chevrolet Silverado

U0020 2014 Chevrolet Silverado Code - Low Speed CAN Bus

Quick Answer

Devices connected to the General Motors Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include If other codes are present, diagnose other codes first, Faulty Control Module, Control Module harness is open or shorted. 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: U0020 2014 Chevrolet Silverado indicates Low Speed CAN Bus.
Common causes: Common causes include If other codes are present, diagnose other codes first, Faulty Control Module, Control Module harness is open or shorted.
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 482

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0020 2014 Chevrolet Silverado Description

Devices connected to the General Motors Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages need to be exchanged on the serial data circuits. The messages are also supervised, and some periodic messages are used by the receiver device as an availability indication of the transmitter device. The Diagnostic Trouble Code (DTC) will be set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0020 2014 Chevrolet Silverado - Low Speed CAN Bus - AutoCodes.com — U0020 2014 Chevrolet Silverado Code - Low Speed CAN Bus

What does this mean?

What are the Possible Causes of the DTC U0020 2014 Chevrolet Silverado?

If other codes are present, diagnose other codes first
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0020 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 does this mean?

Code Tech Notes

Controller Area Network (CAN)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0020 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 U0020 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 U0020 2014 Chevrolet Silverado Code

1. What is the meaning of OBDII code U0020 in a 2014 Chevrolet Silverado?

The code U0020 in a 2014 Chevrolet Silverado indicates a communication problem in the Low Speed Controller Area Network (CAN) Bus.

2. What are the common symptoms of a U0020 code in a 2014 Chevrolet Silverado?

Common symptoms of a U0020 code may include issues with the operation of various control modules, warning lights on the dashboard, and potential loss of communication between vehicle systems.

3. What are the possible causes of a U0020 code in a 2014 Chevrolet Silverado?

Potential causes of a U0020 code include wiring or connection issues in the Low Speed CAN Bus system, faulty control modules, water damage, or a damaged CAN Bus network.

4. How can I diagnose a U0020 code in my 2014 Chevrolet Silverado?

Diagnosing a U0020 code typically involves using a diagnostic scanner to retrieve the fault codes, checking the wiring and connections in the Low Speed CAN Bus system, and testing the control modules for proper functionality.

5. Can I drive my 2014 Chevrolet Silverado with a U0020 code?

It is not recommended to drive your vehicle with an unresolved U0020 code, as it may lead to further communication issues between critical vehicle systems.

6. How can I repair a U0020 code in my 2014 Chevrolet Silverado?

Repairing a U0020 code may involve fixing wiring or connection issues, replacing faulty control modules, ensuring proper grounding, or addressing any water damage in the CAN Bus network.

7. Is it possible to reset a U0020 code in a 2014 Chevrolet Silverado without repairs?

While clearing the fault code temporarily may be possible, it is essential to address the underlying issue causing the U0020 code to prevent it from reoccurring.

8. Are there any recalls related to the U0020 code in a 2014 Chevrolet Silverado?

It is advisable to check with the manufacturer or a dealership to inquire about any recalls or service bulletins related to the U0020 code in your specific Chevrolet Silverado model.

9. Can a DIY enthusiast repair a U0020 code in a 2014 Chevrolet Silverado?

Depending on your level of automotive expertise, some DIY enthusiasts may be able to address simple causes of a U0020 code, such as checking and repairing wiring connections. However, complex issues may require professional assistance.

10. How much does it typically cost to repair a U0020 code in a 2014 Chevrolet Silverado?

The cost of repairing a U0020 code can vary depending on the underlying cause, parts needed for replacement, labor costs, and whether the repair is done at a dealership or an independent repair shop. It is recommended to obtain quotes from different service providers for an accurate estimate.