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Engine-Codes – GMC – P0706 2015 GMC Sierra

P0706 2015 GMC Sierra Code - Transmission Range Switch Performance

Quick Answer

The P0706 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Transmission Range Switch (TRS) performance. Common causes include Faulty Transmission Range Switch, Damaged wiring or connectors, Corrosion in the electrical connections. 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
P0706 2015 GMC Sierra indicates Transmission Range Switch Performance.
Common causes
Common causes include Faulty Transmission Range Switch, Damaged wiring or connectors, Corrosion in the electrical connections.
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 16, 2024
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Code P0706 2015 GMC Sierra Description

The P0706 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Transmission Range Switch (TRS) performance. The TRS, also known as the Range Sensor or Neutral Safety Switch, is a crucial component of the vehicle's transmission system. It is responsible for detecting the gear position (Park, Reverse, Neutral, Drive, etc.) selected by the driver and sending this information to the engine control module (ECM) to ensure proper operation of the transmission.

OBDII Code P0706 2015 GMC Sierra - Transmission Range Switch Performance
P0706 2015 GMC Sierra Code - Transmission Range Switch Performance

Common Causes of P0706 2015 GMC Sierra

  1. Faulty Transmission Range Switch
  2. Damaged wiring or connectors
  3. Corrosion in the electrical connections
  4. ECM software issues
  5. Physical damage to the TRS due to external factors

Symptoms of P0706 2015 GMC Sierra

  1. Difficulty shifting gears
  2. Incorrect gear display on the dashboard
  3. Engine stalling when shifting
  4. Inability to start the vehicle
  5. Check Engine Light illuminated

How to Fix P0706 2015 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the P0706 code and identify the specific cause of the issue.
  2. Inspect the TRS, wiring, and connectors for any visible damage or corrosion. Replace any components that are faulty or damaged.
  3. Clear the DTC from the ECM memory and reset the system to see if the issue persists.
  4. Test drive the vehicle to ensure that the transmission is shifting correctly and that the symptoms associated with the P0706 code have been resolved.
  5. If the problem persists, consider seeking professional help from a certified mechanic or dealership for further diagnosis and repair.

Cost to Fix P0706 2015 GMC Sierra

The typical repair costs for addressing a P0706 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new Transmission Range Switch or wiring components, can range from $100 to $300. Labor costs can add an additional $100 to $200, depending on the shop's hourly rates and the complexity of the repair. It is advisable to contact local auto repair shops for more accurate pricing based on your location and vehicle specifications. Keep in mind that rates may vary, with dealerships typically charging higher labor rates than independent shops.

What does this mean?

Tech Notes for P0706 2015 GMC Sierra

The Internal Mode Switch (IMS) is mounted to the manual shift shaft detent lever as an assembly. The components of the detent lever/IMS assembly cannot be individually serviced. When the IMS needs replacing, the entire assembly must be replaced.

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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 P0706 2015 GMC Sierra Code

1. What does the OBDII code P0706 mean on a 2015 GMC Sierra?

P0706 indicates an issue with the Transmission Range Switch, suggesting it is providing an invalid or inconsistent signal to the vehicle’s computer.

2. What are the common symptoms of code P0706 on a 2015 GMC Sierra?

Symptoms may include difficulty shifting gears, the vehicle being stuck in one gear, erratic transmission behavior, a check engine light, or the inability to start the vehicle.

3. What causes the P0706 code to appear on my 2015 GMC Sierra?

Common causes include a faulty transmission range switch, worn or damaged wiring, corroded or loose electrical connections, or issues with the transmission control module (TCM).

4. Can a P0706 code cause transmission damage if ignored?

Yes, ignoring this code can lead to further transmission issues, poor drivability, and potential long-term damage to the transmission system.

5. How is code P0706 diagnosed on a 2015 GMC Sierra?

A technician will typically use a scan tool to verify the code, inspect the transmission range switch and its wiring, and check for proper alignment, continuity, and signal output.

6. Can I still drive my 2015 GMC Sierra with a P0706 code?

Driving with this code is not recommended as it can cause unsafe driving conditions and further damage to the transmission if the issue worsens.

7. How do I fix the P0706 code on my 2015 GMC Sierra?

Repairs may include replacing the transmission range switch, repairing or replacing damaged wiring, cleaning corroded connections, or reprogramming the TCM if necessary.

8. How much does it cost to fix code P0706 on a 2015 GMC Sierra?

The cost can vary but typically ranges from $200 to $500, depending on whether the switch, wiring, or other components need to be replaced.

9. Can a low transmission fluid level cause a P0706 code?

While not a common cause, low or dirty transmission fluid can sometimes contribute to transmission range sensor issues and should be checked as part of the diagnosis.

10. Is the P0706 code specific to the 2015 GMC Sierra?

No, P0706 is a generic OBDII code that can appear on various vehicles, but its specific symptoms and causes may vary depending on the make and model.

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