AutoCodes – Chevrolet – U2100 2017 Chevrolet Silverado

U2100 2017 Chevrolet Silverado Code - CAN Bus Communication

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: U2100 2017 Chevrolet Silverado indicates CAN Bus Communication.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 262

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
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U2100 2017 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 U2100 2017 Chevrolet Silverado - CAN Bus Communication - AutoCodes.com — U2100 2017 Chevrolet Silverado Code - CAN Bus Communication

What does this mean?

What are the Possible Causes of the DTC U2100 2017 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 U2100 2017 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 U2100 2017 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 U2100 2017 Chevrolet Silverado code?

Need more information on how to fix the U2100 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2100 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 U2100 2017 Chevrolet Silverado Code

1. What is OBDII code U2100 in a 2017 Chevrolet Silverado?

Code U2100 indicates a communication error on the Controller Area Network (CAN) bus system in the vehicle.

2. What are the common symptoms of OBDII code U2100 in a 2017 Chevrolet Silverado?

Common symptoms include issues with the vehicle's transmission, ABS system, instrument cluster, or other electronic control modules.

3. What are the possible causes of OBDII code U2100 in a 2017 Chevrolet Silverado?

Possible causes include faulty wiring or connections in the CAN bus system, a malfunctioning control module, water damage, or a software issue.

4. How can I diagnose OBDII code U2100 in a 2017 Chevrolet Silverado?

Diagnosis typically involves using a diagnostic scanner to check for other related trouble codes, inspecting the wiring and connections in the CAN bus system, and testing the control modules for proper communication.

5. Can OBDII code U2100 in a 2017 Chevrolet Silverado be fixed by resetting the system?

While resetting the system may temporarily clear the code, it is important to identify and address the root cause of the communication error to prevent the code from reoccurring.

6. Is it safe to continue driving with OBDII code U2100 in a 2017 Chevrolet Silverado?

It is not recommended to drive the vehicle with unresolved CAN bus communication issues, as it can lead to further malfunctions and potential safety hazards.

7. How much does it typically cost to repair OBDII code U2100 in a 2017 Chevrolet Silverado?

The cost of repair can vary depending on the specific cause of the communication error, but it may involve replacing faulty wiring, repairing control modules, or addressing software issues.

8. Are there any DIY repair tips for OBDII code U2100 in a 2017 Chevrolet Silverado?

Unless you have experience and proper diagnostic tools, it is best to leave the diagnosis and repair of CAN bus communication issues to a qualified mechanic or dealership.

9. Can extreme weather conditions contribute to triggering OBDII code U2100 in a 2017 Chevrolet Silverado?

Yes, extreme weather conditions such as heavy rain or extreme temperatures can potentially lead to water damage or electrical issues that may trigger the U2100 code.

10. Will OBDII code U2100 in a 2017 Chevrolet Silverado cause the vehicle to fail an emissions test?

If left unresolved, the U2100 code may affect the vehicle's emissions control system, potentially causing it to fail an emissions test. It is important to address the issue promptly.