AutoCodes – Chevrolet – U1026 2016 Chevrolet Silverado

U1026 2016 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 2016 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 394

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 2016 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 2016 Chevrolet Silverado - Lost Communication with Transfer Case Control Module - AutoCodes.com — U1026 2016 Chevrolet Silverado Code - Lost Communication with Transfer Case Control Module

What does this mean?

What are the Possible Causes of the DTC U1026 2016 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 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 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 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 U1026 2016 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 2016 Chevrolet Silverado Code

1. What does the OBDII code U1026 on a 2016 Chevrolet Silverado indicate?

The U1026 code signifies a communication problem between the vehicle's engine control module (ECM) and the transfer case control module.

2. What are common symptoms of U1026 in a 2016 Chevrolet Silverado?

Common symptoms include the inability to shift the transfer case, a stuck transfer case in a single mode, and warning lights illuminated on the dashboard.

3. What are the potential causes of the U1026 code in a 2016 Chevrolet Silverado?

Possible causes include damaged wiring or connectors, a faulty transfer case control module, a malfunctioning ECM, or a communication network issue.

4. How can I diagnose the U1026 code on my 2016 Chevrolet Silverado?

Diagnosis typically involves inspecting the wiring and connectors for damage, checking the transfer case control module for proper functioning, and using a diagnostic scanner to identify communication faults.

5. Can I still drive my 2016 Chevrolet Silverado with the U1026 code present?

While the vehicle may still be operable, it is recommended to address the U1026 code promptly to prevent potential transfer case issues and ensure the vehicle's safety and performance.

6. How can I repair the U1026 code on my 2016 Chevrolet Silverado?

Repair options may involve repairing or replacing damaged wiring, connectors, or modules, addressing any communication network issues, and clearing the code with a diagnostic tool.

7. Is it safe to reset the U1026 code on a 2016 Chevrolet Silverado without addressing the underlying issue?

It is not advisable to simply clear the code without addressing the root cause, as the problem may persist and potentially lead to further issues with the transfer case control module.

8. Can a DIY enthusiast fix the U1026 code on a 2016 Chevrolet Silverado?

While some basic troubleshooting like checking connections can be done by a DIY enthusiast, diagnosing and repairing communication issues may require specialized tools and expertise best handled by a professional mechanic.

9. How much does it typically cost to repair the U1026 code on a 2016 Chevrolet Silverado?

Repair costs can vary depending on the specific issue causing the U1026 code, but expenses may include parts replacement, labor costs, and diagnostic fees from a mechanic.

10. How can I prevent the U1026 code from reoccurring on my 2016 Chevrolet Silverado?

To prevent the U1026 code from coming back, it's essential to address any underlying issues promptly, perform regular vehicle maintenance, and ensure proper care of the transfer case control system.