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Engine-Codes – GMC – U1517 GMC

U1517 GMC Code - Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus

Quick Answer

The U1517 GMC diagnostic trouble code indicates that the Body Control Module (BCM) has lost communication with the Sunroof Sunshade Motor Module on the Local Interconnect Network (LIN) bus. Common causes include Faulty sunroof sunshade motor module, Wiring or connection issues in the LIN bus network, BCM software or hardware malfunction. 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
U1517 GMC indicates Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus.
Common causes
Common causes include Faulty sunroof sunshade motor module, Wiring or connection issues in the LIN bus network, BCM software or hardware malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code U1517 GMC Description

The U1517 GMC diagnostic trouble code indicates that the Body Control Module (BCM) has lost communication with the Sunroof Sunshade Motor Module on the Local Interconnect Network (LIN) bus. The LIN bus is a communication network used in modern vehicles to allow various modules to communicate with each other. In this case, the BCM is unable to establish communication with the sunroof sunshade motor module, which can lead to issues with the operation of the sunroof and sunshade.

OBDII Code U1517 GMC - Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus
U1517 GMC Code - Body Control Module Lost Communication With Sunroof Sunshade Motor Module On LIN Bus

Common Causes of U1517 GMC

  1. Faulty sunroof sunshade motor module
  2. Wiring or connection issues in the LIN bus network
  3. BCM software or hardware malfunction
  4. Water intrusion causing corrosion in electrical connections
  5. Physical damage to the sunroof or sunshade components

Symptoms of U1517 GMC

  1. Sunroof not opening or closing properly
  2. Sunshade not retracting or extending as expected
  3. Sunroof getting stuck in a specific position
  4. Interior lighting issues related to sunroof controls

How to Fix U1517 GMC

  1. Begin by conducting a thorough inspection of the sunroof sunshade motor module, checking for any visible damage or signs of malfunction.
  2. Inspect the wiring and connections in the LIN bus network to ensure there are no loose connections or damaged wires.
  3. Use a diagnostic scan tool to attempt to establish communication between the BCM and the sunroof sunshade motor module. If communication cannot be established, further troubleshooting may be required.
  4. If necessary, replace the sunroof sunshade motor module or repair any damaged wiring or connections in the LIN bus network.
  5. Clear the diagnostic trouble codes from the vehicle's memory and test the sunroof and sunshade operation to ensure proper functionality.

Cost to Fix U1517 GMC

The cost of repairing a U1517 GMC code can vary depending on the specific cause of the issue. In general, replacing a faulty sunroof sunshade motor module can cost between $200 and $500, including parts and labor. If the issue is related to wiring or connection problems, the cost may be lower, ranging from $100 to $300. However, if the BCM itself needs to be replaced, the cost can be higher, potentially exceeding $500. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

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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 U1517 GMC Code

1. What are the common symptoms of OBDII code U1517 GMC related to the Body Control Module losing communication with the Sunroof Sunshade Motor Module on the LIN bus?

- Common symptoms include the sunroof or sunshade not operating correctly, malfunction indicator lights illuminating on the dashboard, and potential issues with other electrical components.

2. What are some possible causes of OBDII code U1517 GMC being triggered?

- Possible causes include a faulty Body Control Module, a malfunctioning Sunroof Sunshade Motor Module, damaged wiring or connectors in the LIN bus communication network, or software issues.

3. How can I diagnose the source of the communication loss between the Body Control Module and the Sunroof Sunshade Motor Module?

- A diagnostic scan tool capable of reading manufacturer-specific codes like U1517 GMC can help pinpoint the exact cause by checking for communication errors and monitoring data from the modules involved.

4. Are there any DIY repair tips for addressing OBDII code U1517 GMC?

- While some wiring or connector issues can be visually inspected and repaired by DIY enthusiasts, it is recommended to consult with a professional technician to accurately diagnose and fix the problem.

5. Can driving with OBDII code U1517 GMC present any risks?

- Driving with this code may not pose immediate safety risks, but it is important to address the underlying communication issue promptly to prevent potential malfunctions in the sunroof system or other related components.

6. Is it necessary to replace the Body Control Module or Sunroof Sunshade Motor Module if OBDII code U1517 GMC is detected?

- Not necessarily. Sometimes, the issue may be related to wiring problems or loose connections, which can be repaired without replacing the modules. A thorough diagnosis is crucial to determine the appropriate course of action.

7. How much can I expect to pay for professional repairs related to OBDII code U1517 GMC?

- Repair costs can vary depending on the specific cause of the communication loss and the labor rates of the service provider. It is advisable to obtain estimates from reputable mechanics or dealerships.

8. Can resetting the OBDII system clear the U1517 GMC code temporarily?

- Resetting the system may temporarily clear the code, but if the underlying issue causing the communication loss persists, the code is likely to reappear once the system detects the fault again.

9. Are there any recalls or technical service bulletins related to OBDII code U1517 GMC for GMC vehicles?

- It is recommended to check with a GMC dealership or the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or remedies available.

10. How can I prevent OBDII code U1517 GMC from recurring in the future?

- Regular maintenance checks, timely repairs of any electrical issues, and avoiding water damage to the sunroof system can help prevent the recurrence of U1517 GMC and similar communication errors.

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