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Engine-Codes – GMC – P2535 2017 GMC Sierra

P2535 2017 GMC Sierra Code - Ignition On/Start Switch Circuit High Voltage

Quick Answer

The P2535 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the ignition on/start switch circuit having high voltage. Common causes include Faulty ignition switch, Wiring or connector issues in the ignition switch circuit, Corrosion or damage to the ignition 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
P2535 2017 GMC Sierra indicates Ignition On/Start Switch Circuit High Voltage.
Common causes
Common causes include Faulty ignition switch, Wiring or connector issues in the ignition switch circuit, Corrosion or damage to the ignition 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 Sep 15, 2024
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Code P2535 2017 GMC Sierra Description

The P2535 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the ignition on/start switch circuit having high voltage. This code is typically triggered when the voltage in the ignition switch circuit exceeds the predetermined threshold set by the manufacturer. The ignition switch is a crucial component that allows the driver to start the vehicle by turning the key or pressing the start button. When this circuit has high voltage, it can lead to issues with starting the vehicle, as well as potential safety concerns.

OBDII Code P2535 2017 GMC Sierra - Ignition On/Start Switch Circuit High Voltage
P2535 2017 GMC Sierra Code - Ignition On/Start Switch Circuit High Voltage

Common Causes of P2535 2017 GMC Sierra

  1. Faulty ignition switch
  2. Wiring or connector issues in the ignition switch circuit
  3. Corrosion or damage to the ignition switch circuit components
  4. ECM malfunction
  5. Electrical system issues

Symptoms of P2535 2017 GMC Sierra

  1. Check Engine Light illuminated on the dashboard
  2. Difficulty starting the vehicle
  3. Intermittent stalling while driving
  4. Electrical issues such as power windows or radio not functioning properly

How to Fix P2535 2017 GMC Sierra

  1. Begin by using a diagnostic scanner to retrieve the trouble codes and verify the presence of P2535.
  2. Inspect the ignition switch and its circuit for any visible damage, corrosion, or loose connections.
  3. Test the voltage in the ignition switch circuit to determine if it exceeds the specified threshold.
  4. Replace the ignition switch if it is found to be faulty, and repair or replace any damaged wiring or connectors.
  5. Clear the trouble codes from the ECM and test the vehicle to ensure the issue has been resolved.

Cost to Fix P2535 2017 GMC Sierra

The cost of repairing the P2535 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair for this type of problem can range from $150 to $500, including parts and labor. It is recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's condition and location. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to inquire about these details before proceeding with the repair.

What does this mean?

Tech Notes for P2535 2017 GMC Sierra

There is a Factory Service Bulletin for the following Chevrolet models:

2016-2018 Chevrolet Silverado 1500

2019 Chevrolet Silverado LD

Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start

Need more information about the P2535 2017 GMC Sierra code?

Need more information on how to fix the P2535 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2535 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P2535 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2535 in a 2017 GMC Sierra?

- Common symptoms include difficulty starting the vehicle, loss of power, and potentially, the engine stalling.

2. What can cause the Ignition On/Start Switch Circuit High Voltage error code (P2535) in a 2017 GMC Sierra?

- The code P2535 can be triggered by issues such as a faulty ignition switch, damaged wiring, or a malfunctioning starter relay.

3. How serious is the OBDII code P2535 in a 2017 GMC Sierra?

- While the vehicle may still be drivable with this code, it is important to address it promptly to avoid potential safety hazards and further damage to the vehicle.

4. Can driving with the P2535 code present cause any long-term damage to the vehicle?

- Continuing to drive with the P2535 code may lead to increased wear on the starter motor and other related components, potentially resulting in more costly repairs.

5. What are some DIY repair tips for addressing the Ignition On/Start Switch Circuit High Voltage code in a 2017 GMC Sierra?

- DIY enthusiasts can start by checking the ignition switch, inspecting the wiring for any visible damage, and testing the starter relay for proper functionality.

6. Is it recommended to reset the OBDII code P2535 in a 2017 GMC Sierra after making repairs?

- Yes, it is advisable to clear the error code after fixing the underlying issue to see if the problem has been successfully resolved.

7. Can a faulty battery or alternator cause the P2535 code to appear in a 2017 GMC Sierra?

- While less common, issues with the battery or alternator could potentially trigger the P2535 code due to disruptions in the electrical system.

8. How much can a professional repair for the P2535 code in a 2017 GMC Sierra typically cost?

- The cost of professional repairs for the P2535 code can vary depending on the exact cause of the issue and the rates charged by the repair shop, but it may range from $100 to $300 or more.

9. Will the check engine light remain illuminated in a 2017 GMC Sierra after fixing the Ignition On/Start Switch Circuit High Voltage issue?

- After successfully repairing the underlying problem causing the P2535 code, the check engine light should turn off once the vehicle's computer detects that the issue has been resolved.

10. How can a mechanic diagnose the specific cause of the P2535 code in a 2017 GMC Sierra?

- A mechanic can use a diagnostic scanner to retrieve additional error codes, perform voltage tests on the ignition switch circuit, and inspect related components to pinpoint the exact cause of the issue.

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