AutoCodes – GMC – B3527 GMC

B3527 GMC Code - Window Lockout Switch Circuit Low

Quick Answer

This window lockout switch or circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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: B3527 GMC indicates Window Lockout Switch Circuit Low.
Common causes: Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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 551

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 Mar 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3527 GMC Description

This window lockout switch or circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). There are no external circuits. The DDSA internally supplies power and ground to the contacts of the window lockout switch. When the window lockout switch is operated, the switch contacts momentarily close to ground, providing the DDSA with a signal. The DDSA processes the signal, assigns to digital message to it, then sends the message to the passenger door modules via the class 2 serial data circuit. Upon receiving a class 2 message to lockout the passenger door windows, the passenger door modules will not allow their associated window to operate from the associated passenger door window switch.
If the window lockout is OFF deactivated, it will transition to ON activated when the switch button is momentarily pressed once. If the window lockout is already ON, it will transition to OFF when the switch button is momentarily pressed once. When the lockout is active, the switch button LED will be illuminated and the passenger door windows will not be operational from the passenger door window switches. However, the passenger door windows can still be operated from the appropriate power window switch built into the DDSA.

OBDII Code B3527 GMC - Window Lockout Switch Circuit Low - AutoCodes.com — B3527 GMC Code - Window Lockout Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3527 GMC?

Faulty Driver Door Switch Assembly (DDSA)
Driver Door Switch Assembly (DDSA) harness is open or shorted
Driver Door Switch Assembly (DDSA) circuit poor electrical connection

How to Fix the DTC B3527 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 B3527 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 B3527 GMC Code

1. What are the common symptoms of OBDII code B3527 GMC (Window Lockout Switch Circuit Low)?

The common symptoms include the power window lockout switch not working, power windows being inoperable, and the power window system not responding properly.

2. What are the potential causes of OBDII code B3527 GMC?

Possible causes of this code include a faulty window lockout switch, damaged wiring or connectors in the window lockout circuit, or a malfunctioning power window control module.

3. How can I diagnose the issue related to OBDII code B3527 GMC?

You can start by checking the window lockout switch for any physical damage or signs of wear. Inspecting the wiring and connectors in the circuit for any breaks or corrosion is also recommended.

4. Can I repair OBDII code B3527 GMC on my own?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair this issue on your own by replacing the faulty components or repairing damaged wiring.

5. Is it safe to continue driving with OBDII code B3527 GMC present?

It is not recommended to drive with this code present, as it can affect the proper functioning of the power window system, which may pose safety risks in certain situations.

6. Will resetting the OBDII code B3527 GMC make the issue go away?

Resetting the code may temporarily clear the error code, but if the underlying issue is not addressed, it is likely to reoccur. It is important to diagnose and repair the root cause of the problem.

7. How much does it typically cost to repair OBDII code B3527 GMC?

The cost of repair can vary depending on the exact cause of the issue, labor rates in your area, and whether you choose to repair the problem yourself or take your vehicle to a professional mechanic.

8. Can extreme weather conditions affect OBDII code B3527 GMC?

Extreme temperatures or moisture exposure can potentially worsen the symptoms associated with this code, as they can exacerbate existing electrical issues in the power window system.

9. Are there any preventive measures to avoid OBDII code B3527 GMC in the future?

Regularly inspecting and maintaining the power window system, including the window lockout switch and associated wiring, can help prevent issues that may trigger this OBDII code.

10. How long does it typically take to repair OBDII code B3527 GMC?

The repair time can vary depending on the extent of the issue and your level of experience with automotive repairs. It may take anywhere from a few hours to a full day to diagnose and fix the problem.