P0703 2015 GMC Sierra Code - Brake Switch Signal Message Counter Incorrect
Quick Answer
The P0703 code for a 2015 GMC Sierra indicates that the brake switch signal message counter is incorrect. Common causes include Faulty brake switch, Wiring or electrical connection issues, Corroded connectors. 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
- P0703 2015 GMC Sierra indicates Brake Switch Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty brake switch, Wiring or electrical connection issues, Corroded connectors.
- 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 P0703 2015 GMC Sierra Description
The P0703 code for a 2015 GMC Sierra indicates that the brake switch signal message counter is incorrect. This means that the signal sent from the brake switch is not being received or interpreted correctly by the vehicle's computer system. The brake switch is an essential component that informs the vehicle when the brake pedal is pressed, allowing for proper operation of systems such as the brake lights, cruise control, and transmission shifting. When this signal is not being registered correctly, it can lead to various issues with the vehicle's performance and safety.
Common Causes of P0703 2015 GMC Sierra
- Faulty brake switch
- Wiring or electrical connection issues
- Corroded connectors
- Software or programming issues
- Damage to the brake switch signal circuit
Symptoms of P0703 2015 GMC Sierra
- Brake lights not working properly
- Cruise control not engaging or disengaging correctly
- Difficulty shifting out of Park
- Check Engine light is illuminated
- Loss of communication with the vehicle's transmission control module
How to Fix P0703 2015 GMC Sierra
- Begin by verifying the code with a diagnostic scanner to confirm the issue.
- Inspect the brake switch and wiring for any visible damage or corrosion.
- Test the brake switch for proper functionality using a multimeter.
- Replace the brake switch if it is found to be faulty.
- Clear the code and test the vehicle to ensure the issue has been resolved.
Cost to Fix P0703 2015 GMC Sierra
The cost of repairing a P0703 code on a 2015 GMC Sierra can vary depending on the exact cause of the issue. In general, the cost of a new brake switch can range from $20 to $50, plus labor costs which can range from $80 to $150 per hour. Overall, the total repair cost for this issue could range from $100 to $300. It is advisable to consult with a trusted mechanic or dealership for a more accurate estimate based on your specific vehicle and location.
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Frequently Asked Questions about P0703 2015 GMC Sierra Code
1. What does the OBDII code P0703 mean on a 2015 GMC Sierra?
P0703 indicates an issue with the brake switch signal message counter, which is typically related to a malfunction in the brake switch circuit or its corresponding components.
2. What are common symptoms of code P0703 on a 2015 GMC Sierra?
Symptoms may include erratic or incorrect transmission shifting, the brake lights not functioning properly, or the inability to shift out of park.
3. What causes the P0703 code on a 2015 GMC Sierra?
Common causes include a faulty brake switch, damaged wiring or connectors in the brake switch circuit, or issues with the transmission control module (TCM).
4. Can code P0703 affect the transmission on a 2015 GMC Sierra?
Yes, a malfunctioning brake switch signal can impact the transmission’s ability to shift correctly, as the TCM relies on accurate brake signal input for proper operation.
5. How do you diagnose the P0703 code on a 2015 GMC Sierra?
Diagnosis typically involves checking the brake switch operation, inspecting the wiring and connectors for damage, and testing the signal output to the TCM using a multimeter.
6. Is it safe to drive a 2015 GMC Sierra with code P0703?
Driving with code P0703 is not recommended, as it may result in unsafe conditions like impaired brake light function or transmission shifting issues.
7. How do you fix code P0703 on a 2015 GMC Sierra?
Common fixes include replacing the brake switch, repairing damaged wiring or connectors, and potentially reprogramming or replacing the TCM if needed.
8. How much does it cost to repair code P0703 on a 2015 GMC Sierra?
The repair cost depends on the cause but typically ranges from $50 for a brake switch replacement to several hundred dollars for wiring repairs or TCM replacement.
9. Can a faulty brake switch trigger the P0703 code on a 2015 GMC Sierra?
Yes, a malfunctioning brake switch is one of the most common reasons for the P0703 code.
10. Do I need special tools to fix code P0703 on a 2015 GMC Sierra?
Basic tools like a multimeter, socket set, and OBDII scanner are usually sufficient for diagnosing and repairing this code.
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