AutoCodes – Chevrolet – U1026 2015 Chevrolet Silverado

U1026 2015 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 2015 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 268

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 2015 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 2015 Chevrolet Silverado - Lost Communication with Transfer Case Control Module - AutoCodes.com — U1026 2015 Chevrolet Silverado Code - Lost Communication with Transfer Case Control Module

What does this mean?

What are the Possible Causes of the DTC U1026 2015 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 2015 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 2015 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 2015 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 2015 Chevrolet Silverado Code

1. What does the OBDII code U1026 mean for a 2015 Chevrolet Silverado?

The U1026 code indicates a communication problem between the vehicle's onboard diagnostic system and the Transfer Case Control Module (TCCM).

2. What are the common symptoms associated with the U1026 code in a 2015 Chevrolet Silverado?

Common symptoms include the illumination of the Check Engine Light, issues with the vehicle's 4-wheel drive system, and difficulty shifting gears.

3. What are the possible causes of the U1026 code in a 2015 Chevrolet Silverado?

Potential causes of the U1026 code include faulty wiring or connectors, a malfunctioning TCCM, a blown fuse, water damage, or a software glitch.

4. How can I diagnose the U1026 code in my 2015 Chevrolet Silverado?

Diagnosing the U1026 code typically involves using an OBDII scanner to retrieve the code, checking the TCCM for any visible damage, inspecting wiring and connectors for signs of wear or corrosion, and performing a reset of the TCCM.

5. How can I repair the U1026 code in my 2015 Chevrolet Silverado?

Repairing the U1026 code may involve repairing or replacing damaged wiring or connectors, replacing the TCCM if it is faulty, checking and replacing any blown fuses, and ensuring all connections are secure.

6. Can I continue to drive my 2015 Chevrolet Silverado with the U1026 code?

It is not recommended to drive the vehicle with the U1026 code present, as it may lead to further damage or safety concerns, especially if the 4-wheel drive system is affected.

7. How much does it typically cost to repair the U1026 code in a 2015 Chevrolet Silverado?

The cost of repairing the U1026 code can vary depending on the exact cause of the issue and whether any parts need to be replaced. It is advisable to consult a mechanic for an accurate estimate.

8. Is the U1026 code a common issue in 2015 Chevrolet Silverado vehicles?

While not extremely common, the U1026 code can occur in 2015 Chevrolet Silverado trucks, particularly in models that have experienced issues with the transfer case control module or wiring.

9. Can I reset the U1026 code in my 2015 Chevrolet Silverado myself?

You may be able to clear the U1026 code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

10. How can I prevent the U1026 code from appearing in my 2015 Chevrolet Silverado in the future?

Regularly inspecting and maintaining the transfer case control module, checking wiring and connectors for damage, and avoiding water exposure can help prevent the U1026 code from appearing in the future.