AutoCodes – GMC – U026C GMC

U026C GMC Code - Lost Communication With Right Rear Short Range Radar Sensor Module

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 Right Rear Short Range Radar Sensor Module, Right Rear Short Range Radar Sensor Module harness is open or shorted, Right Rear Short Range Radar Sensor 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: U026C GMC indicates Lost Communication With Right Rear Short Range Radar Sensor Module.
Common causes: Common causes include Faulty Right Rear Short Range Radar Sensor Module, Right Rear Short Range Radar Sensor Module harness is open or shorted, Right Rear Short Range Radar Sensor 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 494

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 Apr 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U026C GMC 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 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 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) sets when a periodic message from the Right Rear Short Range Radar Sensor Module has not been received.

OBDII Code U026C GMC - Lost Communication With Right Rear Short Range Radar Sensor Module - AutoCodes.com — U026C GMC Code - Lost Communication With Right Rear Short Range Radar Sensor Module

What does this mean?

What are the Possible Causes of the DTC U026C GMC?

Faulty Right Rear Short Range Radar Sensor Module
Right Rear Short Range Radar Sensor Module harness is open or shorted
Right Rear Short Range Radar Sensor Module circuit poor electrical connection

How to Fix the DTC U026C GMC?

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 U026C GMC 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.

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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 U026C GMC Code

1. What are the common symptoms of OBDII code U026C GMC?

- Common symptoms include malfunctioning right rear short range radar sensor, loss of communication with the sensor module, and potential issues with blind spot monitoring systems.

2. What could cause the OBDII code U026C GMC to appear?

- The code can be triggered by a faulty right rear short range radar sensor module, damaged wiring or connectors, a software glitch, or a communication network issue.

3. How can I diagnose the cause of the lost communication with the right rear radar sensor module?

- Diagnosis typically involves checking the sensor module for physical damage, inspecting the wiring and connectors for any issues, and using a diagnostic scanner to communicate with the module and identify faults.

4. Can I still drive my vehicle with the U026C code present?

- It is generally safe to drive the vehicle with this code, but you may experience a loss of certain safety features like blind spot monitoring until the issue is resolved.

5. What are the potential repair options for resolving the U026C GMC trouble code?

- Repair options may include replacing the right rear short range radar sensor module, repairing damaged wiring or connectors, updating software, or resetting the communication network.

6. How much does it typically cost to fix the U026C code on a GMC vehicle?

- The cost of repairs can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Can I reset the U026C trouble code myself, or do I need a professional to do it?

- You can attempt to reset the code using an OBDII scanner, but it is recommended to address the underlying issue first to prevent the code from reappearing.

8. Is the U026C GMC trouble code specific to certain GMC models or is it common across various vehicles?

- The U026C code is specific to GMC vehicles and is related to the right rear short range radar sensor module used in certain models equipped with advanced driver assistance systems.

9. How urgent is it to address the U026C trouble code once it appears?

- While it is not an emergency, it is advisable to address the U026C code promptly to ensure the proper functioning of safety features and to prevent potential issues with the vehicle's systems.

10. Are there any preventive measures to avoid encountering the U026C GMC trouble code in the future?

- Regular maintenance checks, avoiding physical damage to sensors and wiring, and keeping software up to date can help prevent the recurrence of the U026C trouble code.