AutoCodes – Chevrolet – U1026 2014 Chevrolet Silverado

U1026 2014 Chevrolet Silverado Code - Lost Communication with Transfer Case Control Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Transfer Case Control Module, Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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: U1026 2014 Chevrolet Silverado indicates Lost Communication with Transfer Case Control Module.
Common causes: Common causes include Faulty Transfer Case Control Module, Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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 251

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 21, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1026 2014 Chevrolet Silverado Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed 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 device as an availability indication of the transmitter device. Each message contains the identification number 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 U1026 2014 Chevrolet Silverado - Lost Communication with Transfer Case Control Module - AutoCodes.com — U1026 2014 Chevrolet Silverado Code - Lost Communication with Transfer Case Control Module

What does this mean?

What are the Possible Causes of the DTC U1026 2014 Chevrolet Silverado?

Faulty Transfer Case Control Module
Transfer Case Control Module harness is open or shorted
Transfer Case Control Module circuit poor electrical connection

How to Fix the DTC U1026 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

This is typically an electrical wiring connection issue at one of the controllers being monitored by the manufacturer.
It can occur if:
Someone changes a battery while the ignition switch is left on, that is, left in the Run position.
Someone flashes/upgrades their engine controller - other modules unable to communicate with PCM during this process - this will set U1026 at a multitude of controllers on the vehicle - all false codes. Erase and carry on.
May need to disconnect both battery cables and touch them together for 15 seconds. Reattach battery cables, positive first, then negative and see if a soft reset helps.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1026 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 U1026 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 U1026 2014 Chevrolet Silverado Code

1. What does OBDII code U1026 for a 2014 Chevrolet Silverado mean?

The U1026 code indicates that there is a communication problem between the vehicle's onboard computer system and the transfer case control module.

2. What are the common symptoms of a U1026 code in a Chevrolet Silverado?

Common symptoms of a U1026 code include the Service 4WD light being illuminated on the dashboard, difficulty shifting gears, and loss of control over the transfer case functions.

3. What are some possible causes of a U1026 code in a 2014 Chevrolet Silverado?

Potential causes of a U1026 code include a faulty transfer case control module, wiring issues, a malfunctioning CAN bus communication system, or a software glitch in the vehicle's computer system.

4. How can I diagnose a U1026 code in my Chevrolet Silverado?

Diagnosing a U1026 code typically involves using a diagnostic scanner to read the trouble codes, checking the transfer case control module for proper function, inspecting the wiring for any damage, and testing the communication system between modules.

5. How can I repair a U1026 code in my 2014 Chevrolet Silverado?

Repairing a U1026 code may involve resetting the trouble codes, replacing a faulty transfer case control module, repairing damaged wiring, updating software, or addressing any communication system issues.

6. Can I continue driving my Chevrolet Silverado with a U1026 code?

It is not recommended to continue driving your vehicle with a U1026 code, as it can lead to further damage and safety issues. It is best to address the underlying problem as soon as possible.

7. Will a U1026 code cause my Chevrolet Silverado to fail an emissions test?

A U1026 code may cause your vehicle to fail an emissions test, as it indicates a problem with the transfer case control module that can affect the vehicle's overall performance and emissions.

8. How much does it typically cost to repair a U1026 code in a Chevrolet Silverado?

The cost of repairing a U1026 code can vary depending on the specific cause of the issue. Costs may include parts replacement, labor charges, and diagnostic fees, so it is recommended to consult with a professional mechanic for an accurate estimate.

9. Can I reset a U1026 code in my Chevrolet Silverado without fixing the underlying issue?

While you can reset the trouble codes to temporarily clear the U1026 code, it is important to address the underlying problem to prevent it from recurring and potentially causing further issues with your vehicle.

10. Is a U1026 code a common problem in 2014 Chevrolet Silverado vehicles?

The U1026 code "Lost Communication with Transfer Case Control Module" is a known issue in some 2014 Chevrolet Silverado trucks, especially in models with electronic 4WD systems.