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Engine-Codes – GMC – P0571 GMC

P0571 GMC Code - Cruise Control Brake Switch Circuit

Quick Answer

The P0571 GMC code refers to an issue with the cruise control brake switch circuit. Common causes include Faulty brake switch, Wiring or electrical connection issues in the brake switch circuit, Corrosion or damage to the brake switch circuit components. 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
P0571 GMC indicates Cruise Control Brake Switch Circuit.
Common causes
Common causes include Faulty brake switch, Wiring or electrical connection issues in the brake switch circuit, Corrosion or damage to the brake switch circuit components.
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 Aug 30, 2024
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Code P0571 GMC Description

The P0571 GMC code refers to an issue with the cruise control brake switch circuit. The cruise control system in a vehicle relies on input signals from various sensors, including the brake switch, to function properly. The brake switch is responsible for disabling the cruise control system when the brakes are applied. When this code is triggered, it indicates that there is a malfunction in the circuit that controls the brake switch, potentially leading to the cruise control system not functioning as intended.

OBDII Code P0571 GMC - Cruise Control Brake Switch Circuit
P0571 GMC Code - Cruise Control Brake Switch Circuit

Common Causes of P0571 GMC

  1. Faulty brake switch.
  2. Wiring or electrical connection issues in the brake switch circuit.
  3. Corrosion or damage to the brake switch circuit components.
  4. Malfunctioning cruise control module.
  5. Issues with the vehicle's electronic control module (ECM).

Symptoms of P0571 GMC

  1. Cruise control not engaging or disengaging properly.
  2. Inability to set or maintain a constant speed while using cruise control.
  3. Cruise control cutting out unexpectedly while driving.
  4. Illumination of the check engine light on the dashboard.
  5. The vehicle may experience issues with shifting or acceleration.

How to Fix P0571 GMC

  1. Begin by conducting a thorough inspection of the brake switch and its wiring to check for any visible damage or corrosion.
  2. Test the brake switch using a multimeter to determine if it is functioning correctly.
  3. If the brake switch is faulty, replace it with a new one following the manufacturer's instructions.
  4. Check and repair any damaged wiring or connections in the brake switch circuit.
  5. Clear the diagnostic trouble codes using an OBD-II scanner and test the cruise control system to ensure proper functionality.

Cost to Fix P0571 GMC

The cost of repairing a P0571 GMC code can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty brake switch can range from $50 to $150, while labor costs can range from $80 to $150 per hour. Additional costs may be incurred if there are other components that need to be replaced or repaired. It is recommended to consult with a qualified mechanic or repair shop to get an accurate estimate based on your vehicle's make and model.

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Information for Specific GMC Models

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 P0571 GMC Code

1. What are the common symptoms of OBDII code P0571 GMC?

The common symptoms of code P0571 GMC include the cruise control not working, the brake lights staying on all the time, and the inability to shift out of park.

2. What can cause OBDII code P0571 GMC to trigger?

The most common cause of code P0571 GMC is a faulty cruise control brake switch or a malfunction in the cruise control brake switch circuit.

3. How can I diagnose the issue related to code P0571 GMC?

To diagnose code P0571 GMC, you can start by checking the cruise control brake switch for proper functionality, inspecting the wiring and connectors for any damage, and using a scan tool to retrieve the trouble codes.

4. Can I still drive my vehicle with OBDII code P0571 GMC?

While you may still be able to drive your vehicle with code P0571 GMC, it is recommended to address the issue promptly to avoid potential safety hazards or further damage to the vehicle.

5. How can I repair OBDII code P0571 GMC?

Repairing code P0571 GMC typically involves replacing the faulty cruise control brake switch or repairing any damaged wiring or connectors in the cruise control brake switch circuit.

6. Can a DIY enthusiast fix OBDII code P0571 GMC?

Yes, a DIY enthusiast with some knowledge of automotive systems and access to basic tools can potentially fix code P0571 GMC by following repair guides or consulting with a professional for assistance.

7. Will resetting the check engine light resolve code P0571 GMC?

Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing code P0571 GMC. It's important to diagnose and repair the problem to prevent the code from reoccurring.

8. How long does it typically take to repair OBDII code P0571 GMC?

The repair time for code P0571 GMC can vary depending on the extent of the issue and the expertise of the individual performing the repair. In general, it may take anywhere from 30 minutes to a few hours to complete the repair.

9. Are there any preventive measures to avoid OBDII code P0571 GMC in the future?

Regularly inspecting the cruise control brake switch, maintaining proper electrical connections, and addressing any issues promptly can help prevent OBDII code P0571 GMC from occurring in the future.

10. Can OBDII code P0571 GMC affect the overall performance of the vehicle?

While code P0571 GMC is primarily related to the cruise control brake switch circuit, ignoring the issue can potentially affect the overall performance of the vehicle, especially in terms of safety and convenience features.

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