AutoCodes – Chevrolet – U0077 2016 Chevrolet Silverado

U0077 2016 Chevrolet Silverado Code - Control Module Communication Chassis Expansion CAN Bus

Quick Answer

The devices connected to the chassis high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Check for more codes, 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: U0077 2016 Chevrolet Silverado indicates Control Module Communication Chassis Expansion CAN Bus.
Common causes: Common causes include Check for more codes, 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 657

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 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0077 2016 Chevrolet Silverado Description

The devices connected to the chassis 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 devices when the ignition switch is in any position other than OFF. The chassis high speed GMLAN serial data bus uses terminating resistors that are in parallel with the chassis high speed GMLAN (+) and (-) circuits. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0077 2016 Chevrolet Silverado - Control Module Communication Chassis Expansion CAN Bus - AutoCodes.com — U0077 2016 Chevrolet Silverado Code - Control Module Communication Chassis Expansion CAN Bus

What does this mean?

What are the Possible Causes of the DTC U0077 2016 Chevrolet Silverado?

Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0077 2016 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 U0077 2016 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 U0077 2016 Chevrolet Silverado code?

Need more information on how to fix the U0077 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the 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 U0077 2016 Chevrolet Silverado Code

1. What does the OBDII code U0077 for a 2016 Chevrolet Silverado indicate?

The U0077 code on a 2016 Chevrolet Silverado refers to a Control Module Communication Chassis Expansion CAN Bus error.

2. What are the common symptoms of a U0077 trouble code in a 2016 Chevrolet Silverado?

Common symptoms of a U0077 code in a 2016 Chevrolet Silverado may include issues with the vehicle's ABS system, traction control system, or other chassis-related electronic components.

3. What are the possible causes of the U0077 code in a 2016 Chevrolet Silverado?

Possible causes of the U0077 code in a 2016 Chevrolet Silverado may include faulty wiring or connectors in the chassis CAN bus system, a malfunctioning control module, or a communication network issue.

4. How can I diagnose a U0077 trouble code in my 2016 Chevrolet Silverado?

Diagnosing a U0077 code in a 2016 Chevrolet Silverado involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the chassis CAN bus wiring and connectors, and testing the control modules for proper communication.

5. How can I repair a U0077 code in my 2016 Chevrolet Silverado?

Repairing a U0077 code in a 2016 Chevrolet Silverado may involve repairing or replacing damaged wiring or connectors in the CAN bus system, reprogramming or replacing faulty control modules, and ensuring proper communication between components.

6. Can a U0077 code in a 2016 Chevrolet Silverado cause the vehicle to fail an emissions test?

Yes, a U0077 code in a 2016 Chevrolet Silverado can potentially cause the vehicle to fail an emissions test if it affects the proper functioning of emissions-related components controlled by the chassis CAN bus system.

7. Is it safe to drive with a U0077 trouble code present in a 2016 Chevrolet Silverado?

It is generally not recommended to drive with a U0077 trouble code present in a 2016 Chevrolet Silverado, as it can affect the vehicle's stability control systems and overall safety.

8. How much does it typically cost to repair a U0077 code in a 2016 Chevrolet Silverado?

The cost to repair a U0077 code in a 2016 Chevrolet Silverado can vary depending on the specific underlying issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix a U0077 code in a 2016 Chevrolet Silverado?

While some aspects of diagnosing and repairing a U0077 code in a 2016 Chevrolet Silverado may be tackled by a knowledgeable DIY enthusiast, complex electrical issues and control module replacements may require professional expertise.

10. How often does the U0077 code occur in a 2016 Chevrolet Silverado?

The U0077 code in a 2016 Chevrolet Silverado is relatively rare but can occur due to specific electrical or communication system failures within the vehicle.