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Engine-Codes – GMC – U1528 GMC

U1528 GMC Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

Quick Answer

The U1528 GMC code indicates that there is a communication problem between the Driver/Passenger Seat Memory Control Module and the Driver/Passenger Seat Adjuster Switch on the LIN Bus. Common causes include Faulty Driver/Passenger Seat Memory Control Module, Damaged wiring or connectors in the LIN Bus circuit, Defective Driver/Passenger Seat Adjuster Switch. 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
U1528 GMC indicates Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus.
Common causes
Common causes include Faulty Driver/Passenger Seat Memory Control Module, Damaged wiring or connectors in the LIN Bus circuit, Defective Driver/Passenger Seat Adjuster Switch.
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 15, 2024
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Code U1528 GMC Description

The U1528 GMC code indicates that there is a communication problem between the Driver/Passenger Seat Memory Control Module and the Driver/Passenger Seat Adjuster Switch on the LIN Bus. The LIN Bus is a communication network in the vehicle that allows various modules to communicate with each other. When this communication is lost, it can lead to issues with the seat memory functions, such as storing and recalling seat positions.

OBDII Code U1528 GMC - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus
U1528 GMC Code - Driver/Passenger Seat Memory Control Module Lost Communication With Driver/Passenger Seat Adjuster Switch On LIN Bus

Common Causes of U1528 GMC

  1. Faulty Driver/Passenger Seat Memory Control Module
  2. Damaged wiring or connectors in the LIN Bus circuit
  3. Defective Driver/Passenger Seat Adjuster Switch
  4. Software glitch in the control module
  5. Water damage or corrosion in the control module or switch

Symptoms of U1528 GMC

  1. Inability to store or recall seat positions
  2. Seat moving to incorrect positions on its own
  3. Error message on the instrument cluster related to seat memory
  4. Illumination of the airbag warning light

How to Fix U1528 GMC

  1. Begin by conducting a thorough inspection of the wiring and connectors in the LIN Bus circuit to check for any damage or corrosion.
  2. Test the Driver/Passenger Seat Memory Control Module and the Adjuster Switch for proper functionality using a diagnostic scan tool.
  3. If a faulty component is identified, such as the control module or switch, replace it with a new or refurbished part.
  4. Clear the diagnostic trouble codes from the vehicle's memory using the scan tool.
  5. Perform a final test to ensure that the communication between the control module and switch has been restored and that the seat memory functions are working correctly.

Cost to Fix U1528 GMC

The typical repair costs for addressing the U1528 GMC code can range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to obtain quotes from local auto repair 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 U1528 GMC Code

1. What are the common symptoms of OBDII code U1528 on a GMC vehicle?

Common symptoms include non-functional driver/passenger seat memory settings, inability to adjust seat positions electronically, and warning lights on the dashboard related to the seat control system.

2. What are the possible causes of OBDII code U1528 on a GMC vehicle?

Possible causes include a faulty driver/passenger seat memory control module, a malfunctioning driver/passenger seat adjuster switch, damaged wiring or connectors in the LIN bus communication system, or a software issue within the vehicle's control modules.

3. How can I diagnose OBDII code U1528 on my GMC vehicle?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific code, checking for any associated codes or warning lights, inspecting the seat memory control module and adjuster switch for physical damage, and testing the LIN bus communication network for faults.

4. Is it safe to drive with OBDII code U1528 present on a GMC vehicle?

It is generally safe to drive with this code, as it primarily affects the driver/passenger seat memory control system and does not impact the vehicle's drivability or safety systems. However, it is recommended to address the issue promptly to restore full functionality.

5. Can I repair OBDII code U1528 on my GMC vehicle myself?

Depending on your level of automotive repair experience and access to tools, you may be able to address this code yourself. Common DIY repairs include checking and repairing damaged wiring, replacing the driver/passenger seat memory control module or adjuster switch, and resetting the system using diagnostic equipment.

6. What are some tips for fixing OBDII code U1528 on a GMC vehicle?

Some helpful tips include ensuring all connections in the LIN bus system are secure, checking for any blown fuses related to the seat control system, consulting the vehicle's service manual for specific troubleshooting steps, and seeking assistance from a professional mechanic if needed.

7. Does resetting the OBDII system clear code U1528 on a GMC vehicle?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code U1528 is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent future occurrences.

8. How much does it cost to repair OBDII code U1528 on a GMC vehicle?

The cost of repairing this code can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to obtain quotes from multiple mechanics or dealerships to compare prices.

9. Can OBDII code U1528 on a GMC vehicle cause further damage if left unrepaired?

While the immediate impact of this code is typically limited to the seat memory control system, leaving it unrepaired could potentially lead to further issues with the LIN bus communication network or other control modules in the vehicle. It is best to address the problem promptly to prevent additional damage.

10. Is OBDII code U1528 a common issue in GMC vehicles?

While not extremely common, OBDII code U1528 related to the driver/passenger seat memory control module lost communication can occur in GMC vehicles equipped with this feature. Proper maintenance and timely repairs can help prevent this code from appearing.

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