P0703 2015 GMC Sierra Code - Brake Switch Signal Message Counter Incorrect
Quick Answer
The Body Control Module (BCM) monitors the brake pedal position sensor. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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
- P0703 2015 GMC Sierra indicates Brake Switch Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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 P0703 2015 GMC Sierra Description
What are the Possible Causes of the DTC P0703 2015 GMC Sierra?
- Faulty Body Control Module (BCM)
- Body Control Module harness is open or shorted
- Body Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0703 2015 GMC Sierra?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0703 2015 GMC Sierra 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.
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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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