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Engine-Codes – GMC – B3875 2017 GMC Sierra

B3875 2017 GMC Sierra Code - Windshield Wiper High Speed Relay Circuit

Quick Answer

The B3875 diagnostic trouble code for a 2017 GMC Sierra specifically relates to the Windshield Wiper High Speed Relay Circuit. Common causes include Faulty windshield wiper high-speed relay switch, Damaged or corroded wiring in the relay circuit, Loose or poor connections in the circuit. 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
B3875 2017 GMC Sierra indicates Windshield Wiper High Speed Relay Circuit.
Common causes
Common causes include Faulty windshield wiper high-speed relay switch, Damaged or corroded wiring in the relay circuit, Loose or poor connections in the circuit.
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 07, 2024
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Code B3875 2017 GMC Sierra Description

The B3875 diagnostic trouble code for a 2017 GMC Sierra specifically relates to the Windshield Wiper High Speed Relay Circuit. This code indicates that there is a malfunction or fault in the circuit responsible for activating the high-speed setting of the windshield wipers. The windshield wiper high-speed relay circuit is an essential component of the vehicle's wiper system, allowing the wipers to operate at their highest speed for optimal visibility during heavy rain or snow.

OBDII Code B3875 2017 GMC Sierra - Windshield Wiper High Speed Relay Circuit
B3875 2017 GMC Sierra Code - Windshield Wiper High Speed Relay Circuit

Common Causes of B3875 2017 GMC Sierra

  1. Faulty windshield wiper high-speed relay switch.
  2. Damaged or corroded wiring in the relay circuit.
  3. Loose or poor connections in the circuit.
  4. Water or moisture intrusion causing electrical issues.
  5. ECM software or hardware malfunction.

Symptoms of B3875 2017 GMC Sierra

  1. Windshield wipers operating at a slower speed than usual.
  2. Inability to activate the high-speed setting of the wipers.
  3. Intermittent wiper operation or erratic behavior.
  4. Wipers not responding to the control switch commands.
  5. Wipers getting stuck or pausing during operation.

How to Fix B3875 2017 GMC Sierra

  1. Begin by performing a thorough inspection of the windshield wiper high-speed relay circuit, including the relay switch, wiring, and connections.
  2. Test the relay switch with a multimeter to determine if it is functioning correctly.
  3. Check for any visible signs of damage or corrosion in the wiring and connections, repairing or replacing as needed.
  4. Verify that there are no water or moisture issues affecting the circuit, ensuring proper sealing and protection.
  5. If the issue persists, consider reprogramming or replacing the ECM to address any underlying software or hardware malfunctions.

Cost to Fix B3875 2017 GMC Sierra

The typical repair costs for addressing a B3875 code related to the Windshield Wiper High Speed Relay Circuit can range from $100 to $300, depending on the extent of the issue and the specific components that need to be repaired or replaced. This estimate includes parts and labor costs, but actual expenses may vary based on the location, vehicle make and model, and the rates of the auto repair shop. It's recommended to consult with a qualified mechanic for an accurate diagnosis and cost assessment.

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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 B3875 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B3875 in a 2017 GMC Sierra related to the Windshield Wiper High Speed Relay Circuit?

The common symptoms include non-functioning high-speed windshield wiper operation or erratic wiper speeds.

2. What could be the potential causes of OBDII code B3875 in a 2017 GMC Sierra?

Possible causes may include a faulty high-speed relay, damaged wiring or connectors in the circuit, or a malfunctioning wiper motor.

3. How can I diagnose the Windshield Wiper High Speed Relay Circuit issue in my 2017 GMC Sierra?

You can use a multimeter to test the high-speed relay, inspect the wiring for any visible damage, and perform a continuity test to identify any open circuits.

4. Is it safe to continue driving my 2017 GMC Sierra with OBDII code B3875 related to the Windshield Wiper High Speed Relay Circuit?

It is not recommended to drive in heavy rain or adverse weather conditions without functioning windshield wipers. Consider repairing the issue promptly to ensure safe driving.

5. Can I repair the Windshield Wiper High Speed Relay Circuit issue in my 2017 GMC Sierra myself?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair the issue yourself by following a detailed repair guide specific to your vehicle.

6. What are the possible consequences of ignoring OBDII code B3875 in a 2017 GMC Sierra related to the Windshield Wiper High Speed Relay Circuit?

Ignoring the issue can lead to reduced visibility during rain or snow, increasing the risk of accidents due to impaired windshield wiper functionality.

7. How much does it typically cost to repair the Windshield Wiper High Speed Relay Circuit issue in a 2017 GMC Sierra at a professional auto repair shop?

The cost of repairs can vary depending on the extent of the issue, the labor rates in your area, and whether any parts need to be replaced. It's advisable to get a few quotes from different shops.

8. Can extreme weather conditions or environmental factors contribute to triggering OBDII code B3875 in a 2017 GMC Sierra?

Extreme cold or heat, moisture ingress, or exposure to corrosive elements can potentially affect the windshield wiper high-speed relay circuit and lead to the triggering of this OBDII code.

9. Are there any preventive maintenance steps I can take to avoid encountering issues with the Windshield Wiper High Speed Relay Circuit in my 2017 GMC Sierra?

Regularly inspecting and cleaning the windshield wiper system, ensuring proper operation, and addressing any minor issues promptly can help prevent more significant problems with the circuit.

10. Does fixing OBDII code B3875 in a 2017 GMC Sierra related to the Windshield Wiper High Speed Relay Circuit require resetting the vehicle's computer system?

After repairing the issue, you may need to clear the error code stored in the vehicle's computer system using an OBDII scanner to reset the system and ensure the problem is resolved.

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