P2535 GMC Code - Ignition On/Start Switch Circuit High Voltage
Quick Answer
The Body Control Module (BCM) controls the ignition main relay through the control circuit by applying a voltage to the circuit. Common causes include Faulty Ignition On/Start Switch, Ignition On/Start Switch harness is open or shorted, Ignition On/Start Switch 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
- P2535 GMC indicates Ignition On/Start Switch Circuit High Voltage.
- Common causes
- Common causes include Faulty Ignition On/Start Switch, Ignition On/Start Switch harness is open or shorted, Ignition On/Start Switch 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.
Code P2535 GMC Description
The Diagnostic Trouble Code (DTC) will be set when the control module detects greater than 6 V or greater on the ignition voltage circuit, with the ignition turned OFF.
What are the Possible Causes of the DTC P2535 GMC?
- Faulty Ignition On/Start Switch
- Ignition On/Start Switch harness is open or shorted
- Ignition On/Start Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC P2535 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.
Code Tech Notes
2016-2018 GMC Sierra 1500
2019 GMC Sierra Limited
Dead Battery / P1682 P129D P10E4 P2535 / Crank No Start
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2535 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.
Need more information about the P2535 GMC code?
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Need Help with the Code?
Get the P2535 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P2535 2014 GMC Sierra — Ignition On/Start Switch Circuit High Voltage
- P2535 2015 GMC Sierra — Ignition On/Start Switch Circuit High Voltage
- P2535 2016 GMC Sierra — Ignition On/Start Switch Circuit High Voltage
- P2535 2017 GMC Sierra — Ignition On/Start Switch Circuit High Voltage
- P2535 2018 GMC Sierra — Ignition On/Start Switch Circuit High Voltage
Frequently Asked Questions about P2535 GMC Code
1. What are the common symptoms of OBDII code P2535 GMC?
Symptoms of code P2535 may include difficulty starting the vehicle, the engine not turning over, or the vehicle stalling unexpectedly.
2. What can cause the ignition On/Start switch circuit high voltage issue (P2535) in a GMC?
Possible causes of P2535 include a faulty ignition switch, damaged wiring or connectors in the ignition switch circuit, or a malfunctioning ignition switch module.
3. How serious is the P2535 GMC trouble code?
The P2535 code should be addressed promptly as it can lead to issues with starting the vehicle or cause unexpected stalling, potentially leaving you stranded.
4. How can I diagnose the OBDII code P2535 GMC?
Diagnosing code P2535 typically involves using a scan tool to check for the code, inspecting the ignition switch and related wiring, and testing the ignition switch module for proper function.
5. Can I continue driving with the P2535 trouble code?
It is not recommended to drive with the P2535 code present, as it can lead to unreliable vehicle starting and potential stalling, posing a safety risk.
6. How can I repair the ignition On/Start switch circuit high voltage issue (P2535) in my GMC?
Repairing P2535 often involves replacing the faulty ignition switch, repairing damaged wiring or connectors, or replacing the ignition switch module if necessary.
7. Will resetting the trouble codes clear P2535 permanently?
Resetting the trouble codes may temporarily clear the P2535 code, but if the underlying issue is not addressed, the code is likely to return.
8. Can a DIY enthusiast fix the P2535 GMC trouble code at home?
Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the P2535 code at home. However, if in doubt, it's best to consult a professional mechanic.
9. How much does it cost to fix the ignition On/Start switch circuit high voltage issue (P2535) at a repair shop?
The cost of repairing P2535 can vary depending on the exact cause of the issue, but it may range from a couple of hundred to a few hundred dollars at a repair shop.
10. How can I prevent the OBDII code P2535 GMC from occurring in the future?
To prevent the recurrence of P2535, it's essential to address any underlying issues promptly, perform regular maintenance on the ignition system, and avoid rough handling of the ignition switch.
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