AutoCodes – GMC – P0703 2016 GMC Sierra

P0703 2016 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 2016 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 165

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0703 2016 GMC Sierra Description

The Body Control Module (BCM) monitors the brake pedal position sensor. When the brake pedal is applied, the BCM detects a predetermined voltage signal. The BCM sends a serial data message to the Engine Control Module (ECM) indicating the status of the stop lamps. The Diagnostic Trouble Code (DTC) will be set when the ECM receives an invalid brake pedal status serial data message from the BCM.

OBDII Code P0703 2016 GMC Sierra - Brake Switch Signal Message Counter Incorrect - AutoCodes.com — P0703 2016 GMC Sierra Code - Brake Switch Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P0703 2016 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 2016 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 2016 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.

Need more information about the P0703 2016 GMC Sierra code?

Need more information on how to fix the P0703 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0703 2016 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 P0703 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0703 on a 2016 GMC Sierra?

- Common symptoms include the Check Engine Light coming on, issues with shifting gears, and potential problems with the vehicle's brake lights.

2. What does the OBDII code P0703 Brake Switch Signal Message Counter Incorrect mean for a 2016 GMC Sierra?

- This code indicates that the vehicle's powertrain control module (PCM) has detected an incorrect number of messages from the brake switch signal.

3. What are the possible causes of OBDII code P0703 on a 2016 GMC Sierra?

- Possible causes include a faulty brake switch, wiring issues in the brake switch circuit, a defective PCM, or problems with the brake light circuit.

4. How serious is OBDII code P0703 Brake Switch Signal Message Counter Incorrect on a 2016 GMC Sierra?

- While the vehicle may still be drivable with this code, it is important to address it promptly as it can affect the proper operation of the transmission and brake lights.

5. Can I still drive my 2016 GMC Sierra with OBDII code P0703 present?

- It is generally not recommended to continue driving the vehicle with this code active, as it can lead to potential transmission issues or safety concerns related to brake light functionality.

6. How can I diagnose and repair OBDII code P0703 on a 2016 GMC Sierra?

- Diagnosing this code typically involves testing the brake switch, inspecting the wiring for damage, and checking the brake light operation. Repair may involve replacing a faulty brake switch or repairing wiring issues.

7. Is it possible to reset OBDII code P0703 on a 2016 GMC Sierra without fixing the underlying issue?

- While clearing the trouble code may temporarily turn off the Check Engine Light, it will likely reappear until the root cause of the problem, such as a faulty brake switch, is addressed.

8. Can a DIY enthusiast fix OBDII code P0703 on a 2016 GMC Sierra?

- Depending on their skill level, a DIY enthusiast may be able to address this code by replacing the brake switch or repairing wiring issues. However, it's recommended to consult a professional if unsure.

9. How much does it cost to repair OBDII code P0703 on a 2016 GMC Sierra at a dealership or repair shop?

- Repair costs can vary depending on the specific issue, but replacing a brake switch or addressing wiring problems related to this code may cost between $100 to $300 at a dealership or repair shop.

10. What are the long-term effects of ignoring OBDII code P0703 on a 2016 GMC Sierra?

- Ignoring this code can potentially lead to transmission problems or safety issues related to brake light malfunctions, so it is advisable to address the underlying cause promptly to prevent further complications.