AutoCodes – GMC – U1526 GMC

U1526 GMC Code - Body Control Module Lost Communication With Rear Seat Heating Control Module On LIN Bus

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Rear Seat Heating Control Module, Rear Seat Heating Control Module harness is open or shorted, Rear Seat Heating 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: U1526 GMC indicates Body Control Module Lost Communication With Rear Seat Heating Control Module On LIN Bus.
Common causes: Common causes include Faulty Rear Seat Heating Control Module, Rear Seat Heating Control Module harness is open or shorted, Rear Seat Heating 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 3,876

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1526 GMC Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to the Body Control Module (BCM) from the Rear Seat Heating Control Module has not been received.

OBDII Code U1526 GMC - Body Control Module Lost Communication With Rear Seat Heating Control Module On LIN Bus - AutoCodes.com — U1526 GMC Code - Body Control Module Lost Communication With Rear Seat Heating Control Module On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1526 GMC?

Faulty Rear Seat Heating Control Module
Rear Seat Heating Control Module harness is open or shorted
Rear Seat Heating Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1526 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 U1526 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.

Need more information about the U1526 GMC code?

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Need Help with the 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 U1526 GMC Code

1. What are the common symptoms of OBDII code U1526 GMC?

- Common symptoms include rear seat heating system not working, illuminated warning lights on the dashboard, and issues with other electronic components in the vehicle.

2. What can cause the U1526 GMC code to appear?

- The code U1526 typically appears when there is a communication error between the Body Control Module (BCM) and the Rear Seat Heating Control Module over the Local Interconnect Network (LIN) bus.

3. How can I diagnose the U1526 GMC code?

- Diagnosing the U1526 code involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connections between the BCM and the Rear Seat Heating Control Module, and performing a communication test.

4. Are there any simple repairs I can try for the U1526 code?

- Simple repairs for the U1526 code may include checking and repairing any damaged wiring or connectors, resetting the system by disconnecting the battery, and reprogramming the modules using a factory scan tool.

5. Is it safe to drive with the U1526 GMC code illuminated?

- It is generally safe to drive with the U1526 code illuminated, but it is recommended to address the issue promptly to prevent any further damage or malfunction in the vehicle's electronic systems.

6. Can I reset the U1526 GMC code without fixing the underlying issue?

- While you can clear the U1526 code with a diagnostic scanner, it is not recommended to reset the code without fixing the communication issue between the BCM and the Rear Seat Heating Control Module, as the problem may persist.

7. How much does it typically cost to repair the U1526 GMC code?

- The cost of repairing the U1526 code can vary depending on the underlying cause. Simple fixes like repairing wiring may be relatively inexpensive, while more complex issues could involve module replacement and be more costly.

8. Will the U1526 code cause my vehicle to fail an emissions test?

- The U1526 code itself is not directly related to emissions, so it should not cause your vehicle to fail an emissions test. However, it is still important to address the issue to ensure proper functioning of the vehicle's systems.

9. Can a DIY enthusiast fix the U1526 GMC code at home?

- DIY enthusiasts with knowledge of automotive electronics may be able to diagnose and repair the U1526 code at home. However, complex issues may require specialized tools and expertise, so professional assistance may be needed.

10. How long does it take to repair the U1526 GMC code?

- The repair time for the U1526 code can vary depending on the exact cause of the communication error. Simple fixes may take a few hours, while more involved repairs could require additional time for diagnostics and part replacement.